Java项目中调用第三方接口的方式有
1. 通过JDK网络类Java.net.HttpURLConnection
2. 通过Apache common封装HttpClient
3. 通过Apache封装好的CloseableHttpClient；
4. Springboot提供的RestTemplate
5. 通过OkHttp；
6. 通过hutool的HttpUtil。
一、HttpURLConnection调用
方式一：
package com.book.xw.web.util;
import org.springframework.lang.Nullable;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class HttpClientUtil {
/**
* http get请求，参数拼接在URL上
* 实例：String url = "http://op.jw.cn/idcard/query" + "?kev=" + "&idcard=" + idCard + "&realname=" + realName;
*/
public static String doGet(String httpUrl){
HttpURLConnection connection = null;
InputStream is = null;
BufferedReader br = null;
StringBuffer result = new StringBuffer();
try {
//创建连接
URL url = new URL(httpUrl);
connection = (HttpURLConnection) url.openConnection();
//设置请求方式
connection.setRequestMethod("GET");
//设置连接超时时间
connection.setReadTimeout(15000);
//开始连接
connection.connect();
//获取响应数据
if (connection.getResponseCode() == 200) {
//获取返回的数据
is = connection.getInputStream();
if (null != is) {
br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
String temp = null;
while (null != (temp = br.readLine())) {
result.append(temp);
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (null != br) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != is) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//关闭远程连接
connection.disconnect();
}
return result.toString();
}
/**
* Http post请求
*/
public static String doPost(String httpUrl, String param) {
StringBuffer result = new StringBuffer();
//连接
HttpURLConnection connection = null;
OutputStream os = null;
InputStream is = null;
BufferedReader br = null;
try {
//创建连接对象
URL url = new URL(httpUrl);
//创建连接
connection = (HttpURLConnection) url.openConnection();
//设置请求方法
connection.setRequestMethod("POST");
//设置连接超时时间
connection.setConnectTimeout(15000);
//设置读取超时时间
connection.setReadTimeout(15000);
//DoOutput设置是否向httpUrlConnection输出，DoInput设置是否从httpUrlConnection读入，此外发送post请求必须设置这两个
//设置是否可读取
connection.setDoOutput(true);
connection.setDoInput(true);
//设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("Content-Type","application/json;charset=utf-8");
//拼装参数
if (null != param && !param.equals("")) {
//设置参数
os = connection.getOutputStream();
//拼装参数
os.write(param.getBytes("UTF-8"));
}
//connection.connect();
//读取响应
if (connection.getResponseCode() == 200) {
is = connection.getInputStream();
if (null != is) {
br = new BufferedReader(new InputStreamReader(is, "GBK"));
String temp = null;
while (null != (temp = br.readLine())) {
result.append(temp);
result.append("\r\n");
}
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭连接
if(br!=null){
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(os!=null){
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(is!=null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//关闭连接
connection.disconnect();
}
return result.toString();
}
}
方式二：
import com.alibaba.fastjson.JSON;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* @ClassName : HttpUrlConnectionToInterface
* @Description : jdk类HttpURLConnection调用第三方http接口
* @Author : wj
* @Version V1.0
*/
public class HttpUrlConnectionToInterface {
/**
* 以post方式调用对方接口方法
* @param pathUrl
*/
public static void doPost(String pathUrl, String data){
OutputStreamWriter out = null;
BufferedReader br = null;
String result = "";
try {
URL url = new URL(pathUrl);
//打开和url之间的连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设定请求的方法为"POST"，默认是GET
//post与get的不同之处在于post的参数不是放在URL字串里面，而是放在http请求的正文内。
conn.setRequestMethod("POST");
//设置30秒连接超时
conn.setConnectTimeout(30000);
//设置30秒读取超时
conn.setReadTimeout(30000);
// 设置是否向httpUrlConnection输出，因为这个是post请求，参数要放在http正文内，因此需要设为true, 默认情况下是false;
conn.setDoOutput(true);
// 设置是否从httpUrlConnection读入，默认情况下是true;
conn.setDoInput(true);
// Post请求不能使用缓存
conn.setUseCaches(false);
//设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive"); //维持长链接
conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
//连接，从上述url.openConnection()至此的配置必须要在connect之前完成，
conn.connect();
/**
* 下面的三句代码，就是调用第三方http接口
*/
//获取URLConnection对象对应的输出流
//此处getOutputStream会隐含的进行connect(即：如同调用上面的connect()方法，所以在开发中不调用上述的connect()也可以)。
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
//发送请求参数即数据
out.write(data);
//flush输出流的缓冲
out.flush();
/**
* 下面的代码相当于，获取调用第三方http接口后返回的结果
*/
//获取URLConnection对象对应的输入流
InputStream is = conn.getInputStream();
//构造一个字符流缓存
br = new BufferedReader(new InputStreamReader(is));
String str = "";
while ((str = br.readLine()) != null){
result += str;
}
System.out.println(result);
//关闭流
is.close();
//断开连接，disconnect是在底层tcp socket链接空闲时才切断，如果正在被其他线程使用就不切断。
conn.disconnect();
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
if (out != null){
out.close();
}
if (br != null){
br.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 以get方式调用对方接口方法
* @param pathUrl
*/
public static void doGet(String pathUrl){
BufferedReader br = null;
String result = "";
try {
URL url = new URL(pathUrl);
//打开和url之间的连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设定请求的方法为"GET"，默认是GET
//post与get的不同之处在于post的参数不是放在URL字串里面，而是放在http请求的正文内。
conn.setRequestMethod("GET");
//设置30秒连接超时
conn.setConnectTimeout(30000);
//设置30秒读取超时
conn.setReadTimeout(30000);
// 设置是否向httpUrlConnection输出，因为这个是post请求，参数要放在http正文内，因此需要设为true, 默认情况下是false;
conn.setDoOutput(true);
// 设置是否从httpUrlConnection读入，默认情况下是true;
conn.setDoInput(true);
// Post请求不能使用缓存(get可以不使用)
conn.setUseCaches(false);
//设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive"); //维持长链接
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
//连接，从上述url.openConnection()至此的配置必须要在connect之前完成，
conn.connect();
/**
* 下面的代码相当于，获取调用第三方http接口后返回的结果
*/
//获取URLConnection对象对应的输入流
InputStream is = conn.getInputStream();
//构造一个字符流缓存
br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
String str = "";
while ((str = br.readLine()) != null){
result += str;
}
System.out.println(result);
//关闭流
is.close();
//断开连接，disconnect是在底层tcp socket链接空闲时才切断，如果正在被其他线程使用就不切断。
conn.disconnect();
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
if (br != null){
br.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
//post请求一般都是把实体对象转为Json字符串
LocationPrintDTO locationPrintDTO = new LocationPrintDTO();
String s = JSON.toJSONString(locationPrintDTO);
doPost("http://127.0.0.1:9090/ZebraPrinter/locationPrint", s);
doGet("https://weather.cma.cn/api/climate?stationid=57516");
}
}
缺点：不能直接使用池化技术，需要自行处理输入输出流
二、apache common封装HttpClient
引入依赖
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>
实现
public class HttpClientUtil {
public static String doGet(String url, String charset) {
//1.生成HttpClient对象并设置参数
HttpClient httpClient = new HttpClient();
//设置Http连接超时为5秒
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
//2.生成GetMethod对象并设置参数
GetMethod getMethod = new GetMethod(url);
//设置get请求超时为5秒
getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
//设置请求重试处理，用的是默认的重试处理：请求三次
getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
String response = "";
//3.执行HTTP GET 请求
try {
int statusCode = httpClient.executeMethod(getMethod);
//4.判断访问的状态码
if (statusCode != HttpStatus.SC_OK) {
System.err.println("请求出错：" + getMethod.getStatusLine());
}
//5.处理HTTP响应内容
//HTTP响应头部信息，这里简单打印
Header[] headers = getMethod.getResponseHeaders();
for(Header h : headers) {
System.out.println(h.getName() + "---------------" + h.getValue());
}
//读取HTTP响应内容，这里简单打印网页内容
//读取为字节数组
byte[] responseBody = getMethod.getResponseBody();
response = new String(responseBody, charset);
System.out.println("-----------response:" + response);
//读取为InputStream，在网页内容数据量大时候推荐使用
//InputStream response = getMethod.getResponseBodyAsStream();
} catch (HttpException e) {
e.printStackTrace();
} catch (IOException e) {
//发生网络异常
System.out.println("发生网络异常!");
} finally {
//6.手动释放连接
getMethod.releaseConnection();
}
return response;
}
public static String doPost(String url, JSONObject json){
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(url);
postMethod.addRequestHeader("accept", "*/*");
postMethod.addRequestHeader("connection", "Keep-Alive");
//设置json格式传送
postMethod.addRequestHeader("Content-Type", "application/json;charset=utf-8");
//必须设置下面这个Header
postMethod.addRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
//添加请求参数
postMethod.addParameter("xxx", json.getString("xxx"));
String res = "";
try {
int code = httpClient.executeMethod(postMethod);
if (code == 200){
res = postMethod.getResponseBodyAsString();
System.out.println(res);
}
} catch (IOException e) {
e.printStackTrace();
}finally {
postMethod.releaseConnection();
}
return res;
}
}
public static void main(String[] args) {
doGet("http://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=13026194071", "UTF-8");
System.out.println("-----------分割线------------");
System.out.println("-----------分割线------------");
System.out.println("-----------分割线------------");
JSONObject jsonObject = new JSONObject();
jsonObject.put("commentId", "13026194071");
doPost("http://tcc.taobao.com/cc/json/mobile_tel_segment.htm", jsonObject);
}
三、CloseableHttpClient
可以使用连接池保持连接，并且过期自动释放。引入jar包
引入依赖
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
实现
package com.book.xw.common.util.utils;
import com.alibaba.fastjson.JSON;
import org.apache.http.Header;
import org.apache.http.HttpStatus;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
public class HttpCloseableClient {
// 池化管理
private static PoolingHttpClientConnectionManager poolConnManager = null;
// 它是线程安全的，所有的线程都可以使用它一起发送http请求
private static CloseableHttpClient httpClient;
static {
try {
SSLContextBuilder builder = new SSLContextBuilder();
builder.loadTrustMaterial(null, new TrustSelfSignedStrategy());
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(builder.build());
// 配置同时支持 HTTP 和 HTPPS
Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create().register("http", PlainConnectionSocketFactory.getSocketFactory()).register("https", sslsf).build();
// 初始化连接管理器
poolConnManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
// 同时最多连接数
poolConnManager.setMaxTotal(640);
// 设置最大路由
poolConnManager.setDefaultMaxPerRoute(320);
// 初始化httpClient
httpClient = getConnection();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (KeyStoreException e) {
e.printStackTrace();
} catch (KeyManagementException e) {
e.printStackTrace();
}
}
public static CloseableHttpClient getConnection() {
RequestConfig config = RequestConfig.custom().setConnectTimeout(5000)
.setConnectionRequestTimeout(5000).setSocketTimeout(5000).build();
CloseableHttpClient httpClient = HttpClients.custom()
// 设置连接池管理
.setConnectionManager(poolConnManager)
.setDefaultRequestConfig(config)
// 设置重试次数
.setRetryHandler(new DefaultHttpRequestRetryHandler(2, false)).build();
return httpClient;
}
public static String httpGet(String url) {
HttpGet httpGet = new HttpGet(url);
CloseableHttpResponse response = null;
try {
response = httpClient.execute(httpGet);
String result = EntityUtils.toString(response.getEntity());
int code = response.getStatusLine().getStatusCode();
if (code == HttpStatus.SC_OK) {
return result;
} else {
return null;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (response != null)
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
public static String post(String uri, Object params, Header... heads) {
HttpPost httpPost = new HttpPost(uri);
CloseableHttpResponse response = null;
try {
StringEntity paramEntity = new StringEntity(JSON.toJSONString(params));
paramEntity.setContentEncoding("UTF-8");
paramEntity.setContentType("application/json");
httpPost.setEntity(paramEntity);
if (heads != null) {
httpPost.setHeaders(heads);
}
response = httpClient.execute(httpPost);
int code = response.getStatusLine().getStatusCode();
String result = EntityUtils.toString(response.getEntity());
if (code == HttpStatus.SC_OK) {
return result;
} else {
return null;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
}
非连接池连接：
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
/**
* @ClassName : CloseableHttpClientToInterface
* @Description : Apache封装好的CloseableHttpClient
* @Author : wj
* @Version V1.0
*/
public class CloseableHttpClientToInterface {
private static String tokenString = "";
private static String AUTH_TOKEN_EXPIRED = "AUTH_TOKEN_EXPIRED";
private static CloseableHttpClient httpClient = null;
/**
* 以get方式调用第三方接口
* @param url
* @return
*/
public static String doGet(String url, String token){
//创建HttpClient对象
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpGet get = new HttpGet(url);
try {
if (tokenString != null && !tokenString.equals("")){
tokenString = getToken();
}
//api_gateway_auth_token自定义header头，用于token验证使用
get.addHeader("api_gateway_auth_token", tokenString);
get.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
HttpResponse response = httpClient.execute(get);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//返回json格式
String res = EntityUtils.toString(response.getEntity());
return res;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 以post方式调用第三方接口
* @param url
* @param json
* @return
*/
public static String doPost(String url, JSONObject json){
try {
if (httpClient == null){
httpClient = HttpClientBuilder.create().build();
}
HttpPost post = new HttpPost(url);
if (tokenString != null && !tokenString.equals("")){
tokenString = getToken();
}
//api_gateway_auth_token自定义header头，用于token验证使用
post.addHeader("api_gateway_auth_token", tokenString);
post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
StringEntity s = new StringEntity(json.toString());
s.setContentEncoding("UTF-8");
//发送json数据需要设置contentType
s.setContentType("application/x-www-form-urlencoded");
//设置请求参数
post.setEntity(s);
HttpResponse response = httpClient.execute(post);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
//返回json格式
String res = EntityUtils.toString(response.getEntity());
return res;
}
} catch (Exception e) {
e.printStackTrace();
}finally {
if (httpClient != null){
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return null;
}
/**
* 获取第三方接口的token
*/
public static String getToken(){
String token = "";
JSONObject object = new JSONObject();
object.put("appid", "appid");
object.put("secretkey", "secretkey");
try {
if (httpClient == null){
httpClient = HttpClientBuilder.create().build();
}
HttpPost post = new HttpPost("http://localhost/login");
post.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.81 Safari/537.36");
StringEntity s = new StringEntity(object.toString());
s.setContentEncoding("UTF-8");
//发送json数据需要设置contentType
s.setContentType("application/x-www-form-urlencoded");
//设置请求参数
post.setEntity(s);
HttpResponse response = httpClient.execute(post);
//这里可以把返回的结果按照自定义的返回数据结果，把string转换成自定义类
//ResultTokenBO result = JSONObject.parseObject(response, ResultTokenBO.class);
//把response转为jsonObject
JSONObject result = JSONObject.parseObject(String.valueOf(response));
if (result.containsKey("token")){
token = result.getString("token");
}
} catch (Exception e) {
e.printStackTrace();
}
return token;
}
/**
* 测试
*/
public static void test(String telephone){
JSONObject object = new JSONObject();
object.put("telephone", telephone);
try {
//首先获取token
tokenString = getToken();
String response = doPost("http://localhost/searchUrl", object);
//如果返回的结果是list形式的，需要使用JSONObject.parseArray转换
//List<Result> list = JSONObject.parseArray(response, Result.class);
System.out.println(response);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
test("12345678910");
}
四、OkHttp3
引入依赖
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.10.0</version>
</dependency>
实现
@Slf4j
public class OkHttpClient {
private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
private volatile static okhttp3.OkHttpClient client;
private static final int MAX_IDLE_CONNECTION = Integer
.parseInt(ConfigManager.get("httpclient.max_idle_connection"));
private static final long KEEP_ALIVE_DURATION = Long
.parseLong(ConfigManager.get("httpclient.keep_alive_duration"));
private static final long CONNECT_TIMEOUT = Long.parseLong(ConfigManager.get("httpclient.connectTimeout"));
private static final long READ_TIMEOUT = Long.parseLong(ConfigManager.get("httpclient. "));
/**
* 单例模式(双重检查模式)
*/
private static okhttp3.OkHttpClient getInstance() {
if (client == null) {
synchronized (okhttp3.OkHttpClient.class) {
if (client == null) {
client = new okhttp3.OkHttpClient.Builder()
.connectTimeout(CONNECT_TIMEOUT, TimeUnit.SECONDS)
.readTimeout(READ_TIMEOUT, TimeUnit.SECONDS)
.connectionPool(new ConnectionPool(MAX_IDLE_CONNECTION, KEEP_ALIVE_DURATION, TimeUnit.MINUTES))
.build();
}
}
}
return client;
}
public static String doPost(String url, String json) throws IOException {
RequestBody body = RequestBody.create(JSON, json);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
try {
Response response = OkHttpClient.getInstance().newCall(request).execute();
if (response.isSuccessful()) {
String result = response.body().string();
log.info("syncPost response = {}, responseBody= {}", response, result);
return result;
}
String result = response.body().string();
log.info("syncPost response = {}, responseBody= {}", response, result);
throw new IOException("三方接口返回http状态码为" + response.code());
} catch (Exception e) {
log.error("syncPost() url:{} have a ecxeption {}", url, e);
throw new RuntimeException("syncPost() have a ecxeption {}" + e.getMessage());
}
}
public static String doGet(String url, Map<String, Object> headParamsMap) throws IOException {
Request request;
final Request.Builder builder = new Request.Builder().url(url);
try {
if (!CollectionUtils.isEmpty(headParamsMap)) {
final Iterator<Map.Entry<String, Object>> iterator = headParamsMap.entrySet()
.iterator();
while (iterator.hasNext()) {
final Map.Entry<String, Object> entry = iterator.next();
builder.addHeader(entry.getKey(), (String) entry.getValue());
}
}
request = builder.build();
Response response = OkHttpClient.getInstance().newCall(request).execute();
String result = response.body().string();
log.info("syncGet response = {},responseBody= {}", response, result);
if (!response.isSuccessful()) {
throw new IOException("三方接口返回http状态码为" + response.code());
}
return result;
} catch (Exception e) {
log.error("remote interface url:{} have a ecxeption {}", url, e);
throw new RuntimeException("三方接口返回异常");
}
}
}
五、OkHttp
引入依赖
<!--okhttp3-->
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>4.9.1</version>
</dependency>
import okhttp3.*;
import java.io.IOException;
/**
* @ClassName : OkHttpToInterface
* @Description :
* @Author : wj
* @Version V1.0
*/
public class OkHttpToInterface {
public static final MediaType JSON = MediaType.get("application/json; charset=utf-8");
/**
* 以get方式调用第三方接口
* @param url
*/
public static void doGet(String url) {
OkHttpClient okHttpClient = new OkHttpClient();
final Request request = new Request.Builder()
.url(url)
.get()//默认就是GET请求，可以不写
.build();
Call call = okHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
System.out.println( "onFailure: ");
}
@Override
public void onResponse(Call call, Response response) throws IOException {
System.out.println("onResponse: " + response.body().string());
}
});
}
/**
* post请求
* @param url
* @param json
*/
public static void doPost(String url, String json){
MediaType mediaType = MediaType.parse("text/x-markdown; charset=utf-8");
String requestBody = json;
Request request = new Request.Builder()
.url(url)
.post(RequestBody.create(mediaType, requestBody))
.build();
OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
System.out.println("onFailure: " + e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
System.out.println(response.protocol() + " " +response.code() + " " + response.message());
Headers headers = response.headers();
for (int i = 0; i < headers.size(); i++) {
System.out.println(headers.name(i) + ":" + headers.value(i));
}
System.out.println("onResponse: " + response.body().string());
}
});
}
public static void main(String[] args) {
doGet("http://tcc.taobao.com/cc/json/mobile_tel_segment.htm?tel=13026194071");
doPost("https://api.github.com/markdown/raw","I am Jdqm.");
}
}
六、RestTemplate
// 先声明bean
@Configuration
public class RestTemplateConfig {
@Bean
public RestTemplate restTemplate(ClientHttpRequestFactory factory){
return new RestTemplate(factory);
}
@Bean
public ClientHttpRequestFactory simpleClientHttpRequestFactory(){
SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
factory.setConnectTimeout(15000);
factory.setReadTimeout(5000);
return factory;
}
}
import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.*;
import org.springframework.web.client.RestTemplate;
/**
* @ClassName : RestTemplateToInterface
* @Description :
* @Author : wj
* @Version V1.0
*/
public class RestTemplateToInterface {
@Autowired
private RestTemplate restTemplate;
/**
* 以get方式请求第三方http接口 getForEntity
* @param url
* @return
*/
public User doGetWith1(String url){
ResponseEntity<User> responseEntity = restTemplate.getForEntity(url, User.class);
User user = responseEntity.getBody();
return user;
}
/**
* 以get方式请求第三方http接口 getForObject
* 返回值返回的是响应体，省去了我们再去getBody()
* @param url
* @return
*/
public User doGetWith2(String url){
User user = restTemplate.getForObject(url, User.class);
return user;
}
/**
* 以post方式请求第三方http接口 postForEntity
* @param url
* @return
*/
public String doPostWith1(String url){
User user = new User("小白", 20);
ResponseEntity<String> responseEntity = restTemplate.postForEntity(url, user, String.class);
String body = responseEntity.getBody();
return body;
}
/**
* 以post方式请求第三方http接口 postForEntity
* @param url
* @return
*/
public String doPostWith2(String url){
User user = new User("小白", 20);
String body = restTemplate.postForObject(url, user, String.class);
return body;
}
/**
* exchange
* @return
*/
public String doExchange(String url, Integer age, String name){
//header参数
HttpHeaders headers = new HttpHeaders();
String token = "asdfaf2322";
headers.add("authorization", token);
headers.setContentType(MediaType.APPLICATION_JSON);
//放入body中的json参数
JSONObject obj = new JSONObject();
obj.put("age", age);
obj.put("name", name);
//组装
HttpEntity<JSONObject> request = new HttpEntity<>(obj, headers);
ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.POST, request, String.class);
String body = responseEntity.getBody();
return body;
}
}
方法可以参考官方文档APi
- delete() 在特定的URL上对资源执行HTTP DELETE操作
- exchange() 在URL上执行特定的HTTP方法，返回包含对象的ResponseEntity，这个对象是从响应体中映射得到的
- execute() 在URL上执行特定的HTTP方法，返回一个从响应体映射得到的对象
- getForEntity() 发送一个HTTP GET请求，返回的ResponseEntity包含了响应体所映射成的对象
- getForObject() 发送一个HTTP GET请求，返回的请求体将映射为一个对象
- postForEntity() POST 数据到一个URL，返回包含一个对象的ResponseEntity，这个对象是从响应体中映射得到的
- postForObject() POST 数据到一个URL，返回根据响应体匹配形成的对象
- headForHeaders() 发送HTTP HEAD请求，返回包含特定资源URL的HTTP头
- optionsForAllow() 发送HTTP OPTIONS请求，返回对特定URL的Allow头信息
- postForLocation() POST 数据到一个URL，返回新创建资源的URL
- put() PUT 资源到特定的URL
七、hutool的HttpUtil
引入依赖
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.7.1</version>
</dependency>
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.http.HttpUtil;
import java.util.HashMap;
/**
* @ClassName : HttpUtilToInterface
* @Description :
* @Author : wj
* @Version V1.0
*/
public class HttpUtilToInterface {
/**
* get请求示例
*/
public static void doGet() {
// 最简单的HTTP请求，可以自动通过header等信息判断编码，不区分HTTP和HTTPS
String result1 = HttpUtil.get("https://www.baidu.com");
// 当无法识别页面编码的时候，可以自定义请求页面的编码
String result2 = HttpUtil.get("https://www.baidu.com", CharsetUtil.CHARSET_UTF_8);
//可以单独传入http参数，这样参数会自动做URL编码，拼接在URL中
HashMap<String, Object> paramMap = new HashMap<>();
paramMap.put("city", "北京");
String result3 = HttpUtil.get("https://www.baidu.com", paramMap);
}
/**
* post请求示例
*/
public static void doPost() {
//post普通请求示例
HashMap<String, Object> paramMap = new HashMap<>();
paramMap.put("city", "北京");
String result= HttpUtil.post("https://www.baidu.com", paramMap);
//文件上传示例
HashMap<String, Object> paramMap1 = new HashMap<>();
//文件上传只需将参数中的键指定（默认file），值设为文件对象即可，对于使用者来说，文件上传与普通表单提交并无区别
paramMap1.put("file", FileUtil.file("D:\\face.jpg"));
String result1= HttpUtil.post("https://www.baidu.com", paramMap1);
//下载文件（很少用）
String fileUrl = "http://mirrors.sohu.com/centos/8.4.2105/isos/x86_64/CentOS-8.4.2105-x86_64-dvd1.iso";
//将文件下载后保存在E盘，返回结果为下载文件大小
long size = HttpUtil.downloadFile(fileUrl, FileUtil.file("e:/"));
System.out.println("Download size: " + size);
}
}
八、自定义HttpClientUtil工具类实现（与上类似）
package com.njsc.credit.util;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class HttpClientUtil {
/**
* 带参数的get请求
* @param url
* @param param
* @return String
*/
public static String doGet(String url, Map<String, String> param) {
// 创建Httpclient对象
CloseableHttpClient httpclient = HttpClients.createDefault();
String resultString = "";
CloseableHttpResponse response = null;
try {
// 创建uri
URIBuilder builder = new URIBuilder(url);
if (param != null) {
for (String key : param.keySet()) {
builder.addParameter(key, param.get(key));
}
}
URI uri = builder.build();
// 创建http GET请求
HttpGet httpGet = new HttpGet(uri);
// 执行请求
response = httpclient.execute(httpGet);
// 判断返回状态是否为200
if (response.getStatusLine().getStatusCode() == 200) {
resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (response != null) {
response.close();
}
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}
/**
* 不带参数的get请求
* @param url
* @return String
*/
public static String doGet(String url) {
return doGet(url, null);
}
/**
* 带参数的post请求
* @param url
* @param param
* @return String
*/
public static String doPost(String url, Map<String, String> param) {
// 创建Httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString = "";
try {
// 创建Http Post请求
HttpPost httpPost = new HttpPost(url);
// 创建参数列表
if (param != null) {
List<NameValuePair> paramList = new ArrayList<>();
for (String key : param.keySet()) {
paramList.add(new BasicNameValuePair(key, param.get(key)));
}
// 模拟表单
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
httpPost.setEntity(entity);
}
// 执行http请求
response = httpClient.execute(httpPost);
resultString = EntityUtils.toString(response.getEntity(), "utf-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}
/**
* 不带参数的post请求
* @param url
* @return String
*/
public static String doPost(String url) {
return doPost(url, null);
}
/**
* 传送json类型的post请求
* @param url
* @param json
* @return String
*/
public static String doPostJson(String url, String json) {
// 创建Httpclient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpResponse response = null;
String resultString = "";
try {
// 创建Http Post请求
HttpPost httpPost = new HttpPost(url);
// 创建请求内容
StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
httpPost.setEntity(entity);
// 执行http请求
response = httpClient.execute(httpPost);
resultString = EntityUtils.toString(response.getEntity(), "utf-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return resultString;
}
}
接口返回的数据是一个json的字符串，类型实际上是一个String字符串，要解析数据，用工具类JsonUtils的parse方法将字符串转换为Java对象，JsonUtils的代码如下：
package com.eqianxian.commons.utils.json;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.PropertyFilter;
import com.alibaba.fastjson.serializer.SerializerFeature;
/**
* 统一使用，方便将来切换不同的JSON生成工具
*
* @author wj
*
*/
public class JsonUtils {
public static final int TYPE_FASTJSON = 0;
public static final int TYPE_GSON = 1;
/**
* <pre>
* 对象转化为json字符串
*
* @param obj 待转化对象
* @return 代表该对象的Json字符串
*/
public static final String toJson(final Object obj) {
return JSON.toJSONString(obj);
// return gson.toJson(obj);
}
/**
* <pre>
* 对象转化为json字符串
*
* @param obj 待转化对象
* @return 代表该对象的Json字符串
*/
public static final String toJson(final Object obj, SerializerFeature... features) {
return JSON.toJSONString(obj, features);
// return gson.toJson(obj);
}
/**
* 对象转化为json字符串并格式化
*
* @param obj
* @param format 是否要格式化
* @return
*/
public static final String toJson(final Object obj, final boolean format) {
return JSON.toJSONString(obj, format);
}
/**
* 对象对指定字段进行过滤处理，生成json字符串
*
* @param obj
* @param fields 过滤处理字段
* @param ignore true做忽略处理，false做包含处理
* @param features json特征，为null忽略
* @return
*/
public static final String toJson(final Object obj, final String[] fields, final boolean ignore,
SerializerFeature... features) {
if (fields == null || fields.length < 1) {
return toJson(obj);
}
if (features == null)
features = new SerializerFeature[] { SerializerFeature.QuoteFieldNames };
return JSON.toJSONString(obj, new PropertyFilter() {
@Override
public boolean apply(Object object, String name, Object value) {
for (int i = 0; i < fields.length; i++) {
if (name.equals(fields[i])) {
return !ignore;
}
}
return ignore;
}
}, features);
}
/**
* <pre>
* 解析json字符串中某路径的值
*
* @param json
* @param path
* @return
*/
@SuppressWarnings("unchecked")
public static final <E> E parse(final String json, final String path) {
String[] keys = path.split(",");
JSONObject obj = JSON.parseObject(json);
for (int i = 0; i < keys.length - 1; i++) {
obj = obj.getJSONObject(keys[i]);
}
return (E) obj.get(keys[keys.length - 1]);
}
/**
* <pre>
* json字符串解析为对象
*
* @param json 代表一个对象的Json字符串
* @param clazz 指定目标对象的类型，即返回对象的类型
* @return 从json字符串解析出来的对象
*/
public static final <T> T parse(final String json, final Class<T> clazz) {
return JSON.parseObject(json, clazz);
}
/**
* <pre>
* json字符串解析为对象
*
* @param json json字符串
* @param path 逗号分隔的json层次结构
* @param clazz 目标类
*/
public static final <T> T parse(final String json, final String path, final Class<T> clazz) {
String[] keys = path.split(",");
JSONObject obj = JSON.parseObject(json);
for (int i = 0; i < keys.length - 1; i++) {
obj = obj.getJSONObject(keys[i]);
}
String inner = obj.getString(keys[keys.length - 1]);
return parse(inner, clazz);
}
/**
* 将制定的对象经过字段过滤处理后，解析成为json集合
*
* @param obj
* @param fields
* @param ignore
* @param clazz
* @param features
* @return
*/
public static final <T> List<T> parseArray(final Object obj, final String[] fields, boolean ignore,
final Class<T> clazz, final SerializerFeature... features) {
String json = toJson(obj, fields, ignore, features);
return parseArray(json, clazz);
}
/**
* <pre>
* 从json字符串中解析出一个对象的集合，被解析字符串要求是合法的集合类型
* （形如:["k1":"v1","k2":"v2",..."kn":"vn"]）
*
* @param json - [key-value-pair...]
* @param clazz
* @return
*/
public static final <T> List<T> parseArray(final String json, final Class<T> clazz) {
return JSON.parseArray(json, clazz);
}
/**
* <pre>
* 从json字符串中按照路径寻找，并解析出一个对象的集合，例如：
* 类Person有一个属性name，要从以下json中解析出其集合：
* {
* "page_info":{
* "items":{
* "item":[{"name":"KelvinZ"},{"name":"Jobs"},...{"name":"Gates"}]
* }
* }
* 使用方法：parseArray(json, "page_info,items,item", Person.class)，
* 将根据指定路径，正确的解析出所需集合，排除外层干扰
*
* @param json json字符串
* @param path 逗号分隔的json层次结构
* @param clazz 目标类
* @return
*/
public static final <T> List<T> parseArray(final String json, final String path, final Class<T> clazz) {
String[] keys = path.split(",");
JSONObject obj = JSON.parseObject(json);
for (int i = 0; i < keys.length - 1; i++) {
obj = obj.getJSONObject(keys[i]);
}
String inner = obj.getString(keys[keys.length - 1]);
List<T> ret = parseArray(inner, clazz);
return ret;
}
/**
* <pre>
* 有些json的常见格式错误这里可以处理，以便给后续的方法处理
* 常见错误：使用了\" 或者 "{ 或者 }"，腾讯的页面中常见这种格式
*
* @param invalidJson 包含非法格式的json字符串
* @return
*/
public static final String correctJson(final String invalidJson) {
String content = invalidJson.replace("\\\"", "\"").replace("\"{", "{").replace("}\"", "}");
return content;
}
/**
* 格式化Json
*
* @param json
* @return
*/
public static final String formatJson(String json) {
Map<?, ?> map = (Map<?, ?>) JSON.parse(json);
return JSON.toJSONString(map, true);
}
/**
* 获取json串中的子json
*
* @param json
* @param path
* @return
*/
public static final String getSubJson(String json, String path) {
String[] keys = path.split(",");
JSONObject obj = JSON.parseObject(json);
for (int i = 0; i < keys.length - 1; i++) {
obj = obj.getJSONObject(keys[i]);
System.out.println(obj.toJSONString());
}
return obj != null ? obj.getString(keys[keys.length - 1]) : null;
}
}
实现代码
public boolean test1(String idCard, String realName){
String url = ......;
logger.info("请求url:" + url);
boolean match = false; //是否匹配
try {
String result = HttpClientUtil.doGet(url);
Student stu = JsonUtils.parse(result, Student.class);
Teacher tea = JsonUtils.parse(result, "result", Teacher.class);
if(stu .correct() && stu .getRes() == 1){
match = true;
}
} catch (Exception e) {
e.printStackTrace();
}
return match;
}
十、我常用的
package com.core.util;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.*;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import javax.net.ssl.SSLContext;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.*;
/**
* @Author: wjh
* @Date: 2022/09/14
* @FileName: HttpClientUtil
* @Description: HttpClientUtil
*/
public class HttpClientUtil {
private static Logger log = LoggerFactory.getLogger(HttpClientUtil.class);
private final static String DEFAULT_ENCODE = "UTF-8";
/**
* 默认 10s 超时
*/
private static final int TIME_OUT = 10 * 1000;
private HttpClientUtil() {
}
/**
* 忽略 ssl
*
* @return
*/
private static SSLContext buildIgnoreContext() {
SSLContext sslContext = null;
try {
sslContext = SSLContexts.custom().setProtocol("TLSv1.2").build();
} catch (NoSuchAlgorithmException | KeyManagementException e) {
log.error(e.getMessage(), e);
}
return sslContext;
}
private static CloseableHttpClient getClient(int timeOut) {
RequestConfig requestConfig = RequestConfig.custom()
.setConnectionRequestTimeout(timeOut)
.setConnectTimeout(timeOut)
.setSocketTimeout(timeOut)
.build();
SSLContext sslContext = buildIgnoreContext();
// 注册
Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", PlainConnectionSocketFactory.INSTANCE)
.register("https", new SSLConnectionSocketFactory(sslContext))
.build();
PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(registry);
return HttpClients.custom()
.setConnectionManager(connManager)
.setDefaultRequestConfig(requestConfig)
.build();
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param jsonStr 请求数据json字符串
* @param headers 请求头
* @param timeOut 超时时间
*/
public static String sendPostJson(String url, String jsonStr, Map<String, String> headers, int timeOut) {
HttpPost post = new HttpPost(url);
if (headers != null && headers.size() > 0) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
post.setHeader(entry.getKey(), entry.getValue());
}
}
StringEntity entity = new StringEntity(jsonStr, DEFAULT_ENCODE);
entity.setContentEncoding(DEFAULT_ENCODE);
entity.setContentType("application/json;charset=" + DEFAULT_ENCODE);
post.setEntity(entity);
return execute(post, timeOut);
}
public static String sendDelete(String url, Map<String, String> headers, int timeOut) {
HttpDelete httpDelete = new HttpDelete(url);
if (headers != null && headers.size() > 0) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
httpDelete.setHeader(entry.getKey(), entry.getValue());
}
}
return execute(httpDelete, timeOut);
}
public static String sendDelete(String url, Map<String, String> headers) {
return sendDelete(url, headers, TIME_OUT);
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param jsonStr 请求数据json字符串
* @param headers 请求头
*/
public static String sendPostJson(String url, String jsonStr, Map<String, String> headers) {
return sendPostJson(url, jsonStr, headers, TIME_OUT);
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param jsonStr 请求数据json字符串
* @param timeOut 超时时间
*/
public static String sendPostJson(String url, String jsonStr, int timeOut) {
return sendPostJson(url, jsonStr, new HashMap<>(0), timeOut);
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param jsonStr 请求数据json字符串
*/
public static String sendPostJson(String url, String jsonStr) {
return sendPostJson(url, jsonStr, TIME_OUT);
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param data 请求数据
*/
public static String sendPostJson(String url, Object data) {
if (data == null) {
data = new HashMap(0);
}
return sendPostJson(url, JSON.toJSONString(data));
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param jsonStr 请求数据json字符串
* @param responseType 返回值类型
*/
public static <T> T postJsonForObject(String url, String jsonStr, Class<T> responseType) {
String result = sendPostJson(url, jsonStr);
if (StringUtils.isNotBlank(result)) {
return JSONObject.parseObject(result, responseType);
} else {
return null;
}
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param jsonStr 请求数据json字符串
* @param responseType 返回值类型
*/
public static <T> T postJsonForObject(String url, String jsonStr, TypeReference<T> responseType) {
String result = sendPostJson(url, jsonStr);
if (StringUtils.isNotBlank(result)) {
return JSON.parseObject(result, responseType);
} else {
return null;
}
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param data 请求数据
* @param responseType 返回值类型
*/
public static <T> T postJsonForObject(String url, Object data, Class<T> responseType) {
if (data == null) {
data = new HashMap(0);
}
return postJsonForObject(url, JSON.toJSONString(data), responseType);
}
/**
* POST application/json请求
*
* @param url 请求地址
* @param data 请求数据
* @param responseType 返回值类型
*/
public static <T> T postJsonForObject(String url, Object data, TypeReference<T> responseType) {
if (data == null) {
data = new HashMap(0);
}
return postJsonForObject(url, JSON.toJSONString(data), responseType);
}
/**
* POST application/x-www-form-urlencoded 请求
*
* @param url 请求地址
* @param params 请求数据map
*/
public static String sendPostForm(String url, Map<String, String> params) {
return sendPostForm(url, params, new HashMap<>(0));
}
/**
* POST application/x-www-form-urlencoded 请求
*
* @param url 请求地址
* @param params 请求数据map
* @param timeOut 超时时间
*/
public static String sendPostForm(String url, Map<String, String> params, int timeOut) {
Map<String, String> headers = new HashMap<>(1);
return sendPostForm(url, params, headers, timeOut);
}
/**
* POST application/x-www-form-urlencoded 请求
*
* @param url 请求地址
* @param params 请求数据map
* @param headers 请求头
*/
public static String sendPostForm(String url, Map<String, String> params, Map<String, String> headers) {
return sendPostForm(url, params, headers, TIME_OUT);
}
/**
* POST application/x-www-form-urlencoded 请求
*
* @param url 请求地址
* @param params 请求数据map
* @param headers 请求头
* @param timeOut 超时时间
*/
public static String sendPostForm(String url, Map<String, String> params, Map<String, String> headers, int timeOut) {
UrlEncodedFormEntity reqEntity = createFormEntity(params);
HttpPost httppost = new HttpPost(url);
httppost.addHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
if (headers != null) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
if (StringUtils.equalsAnyIgnoreCase
(entry.getKey(), HttpHeaders.CONTENT_LENGTH, HttpHeaders.CONTENT_TYPE)) {
continue;
}
httppost.addHeader(entry.getKey(), entry.getValue());
}
}
httppost.setEntity(reqEntity);
return execute(httppost, timeOut);
}
/**
* POST application/x-www-form-urlencoded 请求
*
* @param url 请求地址
* @param params 请求数据map
* @param responseType 返回值类型
*/
public static <T> T postFormForObject(String url, Map<String, String> params, Class<T> responseType) {
String result = sendPostForm(url, params);
if (StringUtils.isNotBlank(result)) {
return JSONObject.parseObject(result, responseType);
} else {
return null;
}
}
/**
* POST application/x-www-form-urlencoded 请求
*
* @param url 请求地址
* @param params 请求数据map
* @param responseType 返回值类型
*/
public static <T> T postFormForObject(String url, Map<String, String> params, TypeReference<T> responseType) {
String result = sendPostForm(url, params);
if (StringUtils.isNotBlank(result)) {
return JSON.parseObject(result, responseType);
} else {
return null;
}
}
/**
* GET 请求
*
* @param url 请求地址
* @param params 请求参数
* @param timeOut 超时时间
* @return
*/
public static String sendGet(String url, Map<String, String> params, int timeOut) {
return sendGet(url, params, new HashMap<>(1), timeOut);
}
/**
* GET 请求
*
* @param url 请求地址
* @param params 请求参数
*/
public static String sendGet(String url, Map<String, String> params) {
return sendGet(url, params, new HashMap<>(1));
}
/**
* GET 请求
*
* @param url url
* @param params 请求参数
* @param headers 请求头
* @param timeOut 超时时间
*/
public static String sendGet(String url, Map<String, String> params, Map<String, String> headers, int timeOut) {
if (url == null) {
return null;
}
try {
URIBuilder uriBuilder = new URIBuilder(url);
if (null != params) {
uriBuilder.setParameters(getNameValuePairList(params));
}
URI uri = uriBuilder.build();
String rawQueryString = uri.getRawQuery();
//拼接url
if (StringUtils.isNotBlank(rawQueryString)) {
// 防止原本url里面就有参数
if (!url.contains("?")) {
url = url + "?";
}
if (url.endsWith("?")) {
url = url + rawQueryString;
} else {
url = url + "&" + rawQueryString;
}
}
HttpGet httpGet = new HttpGet(url);
if (headers != null) {
Set<Map.Entry<String, String>> entrySet = headers.entrySet();
for (Map.Entry<String, String> entry : entrySet) {
httpGet.setHeader(entry.getKey(), entry.getValue());
}
}
return execute(httpGet, timeOut);
} catch (URISyntaxException e) {
log.error(e.getMessage(), e);
}
return null;
}
/**
* GET 请求
*
* @param url 请求地址
* @param params 请求参数
* @param headers 请求头
*/
public static String sendGet(String url, Map<String, String> params, Map<String, String> headers) {
return sendGet(url, params, headers, TIME_OUT);
}
/**
* GET 请求
*
* @param url 请求地址
* @param params 请求参数
* @param responseType 返回值类型
*/
public static <T> T getForObject(String url, Map<String, String> params, Class<T> responseType) {
String result = sendGet(url, params);
if (StringUtils.isNotBlank(result)) {
return JSONObject.parseObject(result, responseType);
} else {
return null;
}
}
/**
* GET 请求
*
* @param url 请求地址
* @param params 请求参数
* @param responseType 返回值类型
*/
public static <T> T getForObject(String url, Map<String, String> params, TypeReference<T> responseType) {
String result = sendGet(url, params);
if (StringUtils.isNotBlank(result)) {
return JSON.parseObject(result, responseType);
} else {
return null;
}
}
private static List<NameValuePair> getNameValuePairList(Map<String, String> params) {
List<NameValuePair> list = new ArrayList<>();
try {
if (params != null && !params.isEmpty()) {
for (String key : params.keySet()) {
String value = params.get(key);
if (value != null) {
list.add(new BasicNameValuePair(key, value));
}
}
}
} catch (Exception e) {
log.error(e.getMessage(), e);
}
return list;
}
private static UrlEncodedFormEntity createFormEntity(Map<String, String> pram) {
try {
List<NameValuePair> formParams = getNameValuePairList(pram);
return new UrlEncodedFormEntity(formParams, DEFAULT_ENCODE);
} catch (UnsupportedEncodingException e) {
log.error(e.getMessage(), e);
}
return null;
}
private static String execute(HttpRequestBase requestBase, int timeOut) {
StringBuilder sb = new StringBuilder();
BufferedReader reader = null;
CloseableHttpResponse response = null;
CloseableHttpClient httpClient = getClient(timeOut);
try {
// 执行
long start = System.currentTimeMillis();
response = httpClient.execute(requestBase);
log.debug("请求id: {} , url: {} , 耗时: {} ", requestBase.getURI().toString(), (System.currentTimeMillis() - start));
HttpEntity entity = response.getEntity();
reader = new BufferedReader(new InputStreamReader(entity.getContent(), DEFAULT_ENCODE));
String line = reader.readLine();
while (line != null) {
sb.append(line);
line = reader.readLine();
}
EntityUtils.consume(entity);
} catch (Exception e) {
log.error("远程调用异常", e);
} finally {
try {
if (reader != null) {
reader.close();
}
if (response != null) {
response.close();
}
httpClient.close();
} catch (IOException e) {
log.error("", e);
}
}
return sb.toString();
}
/**
* POST multipart/form-data 请求
*
* @param requestUrl
* @param body
*/
public static String sendPostWithFile(String requestUrl, RequestBody body) {
try {
OkHttpClient client = new OkHttpClient().newBuilder().build();
Request request = new Request.Builder()
.url(requestUrl)
.method("POST", body)
//.post(body) // 设置请求方法为POST，并传入RequestBody对象
.addHeader("Content-Type", "multipart/form-data")
.build();
Response response = client.newCall(request).execute();
if (response.body() == null) {
log.info("发送httpClent获取数据为空");
return null;
}
log.info("from-data:" + response.body().toString());
return response.body().string();
} catch (Exception e) {
log.info("******发送httpClent 请求出错****" + e.getMessage());
} finally {
}
return null;
}
}
post接口请求文章来源：https://www.toymoban.com/news/detail-758624.html
HashMap<Object, Object> map = new HashMap<>();
map.put("xm", xm);
map.put("sfzh", sfzh);
map.put("sec", sec);
JSONObject params = new JSONObject();
params.put("method", "winning.hms.healthrecord.recordurl.get");
params.put("content", map);
log.info("入参:" + JSON.toJSONString(params));
//String healthUrl = commonService.getSytemCode(orgnCode, "A051");
String healthUrl = dataManager.getConfigValue(orgnCode, "A051");
if (healthUrl == null || healthUrl.isEmpty()) {
return message.setCode("F").setMessage("请配置Url");
}
String resultStr = HttpClientUtil.sendPostJson(healthUrl, params);
if (resultStr != null && !resultStr.isEmpty()) {
JSONObject jsonObject = JSON.parseObject(resultStr);
if (ConstantValues.CONSTANT_1.equals(jsonObject.getString("code"))) {
JSONObject data = jsonObject.getJSONObject("data");
String daurl = data.getString("daurl");
return message.setCode("T").setMessage("success").setData(daurl);
}
}
文件上传请求文章来源地址https://www.toymoban.com/news/detail-758624.html
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
public class Main {
public static void main(String[] args) {
String filePath = "path/to/your/file.txt"; // 替换为你的文件路径
File file = new File(filePath);
MediaType mediaType = MediaType.parse("text/plain"); // 根据文件类型设置MediaType，此处为示例，实际应根据你的文件类型进行调整
RequestBody requestBody = new RequestBody() {
@Override
public MediaType contentType() {
return mediaType;
}
@Override
public long contentLength() {
try {
return Files.size(Paths.get(filePath));
} catch (IOException e) {
e.printStackTrace();
return 0;
}
}
@Override
public void writeTo(BufferedSource source) throws IOException {
Files.copy(Paths.get(filePath), source);
}
};
String resultStr = HttpClientUtil.sendPostWithFile("http://example.com/upload", requestBody);
}
}
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