JAVA调用第三方接口的GET/POST/PUT请求方式-Toy模板网

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GET请求

public static String doGet(String url, String charset){

        System.out.println("请求的接口："+url);

        /**
         * 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("接口返回数据为：" + response);
            //读取为InputStream，在网页内容数据量大时候推荐使用
            //InputStream response = getMethod.getResponseBodyAsStream();
            return response;
        } catch (HttpException e) {
            //发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
            return "调用GET请求失败";
        } catch (IOException e){
            //发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
            return "调用GET请求失败";
        }finally {
            /**
             * 6.释放连接
             */
            getMethod.releaseConnection();
        }
    }

//get请求示例
String result = HttpClientToInterface.doGet("http://127.0.0.1:8085/xxxx/xxxx?yy=yyyyyy&zz=zzzzzzz","UTF-8");

POST请求

public static String doPost(String url, String charset){

        System.out.println("请求的接口："+url);

        /**
         * 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PostMethod对象并设置参数
         */
        PostMethod postMethod = new PostMethod(url);
        //设置post请求超时为5秒
        postMethod.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
        postMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());

        String response = "";

        /**
         * 3.执行HTTP POST 请求
         */
        try {
            int statusCode = httpClient.executeMethod(postMethod);

            /**
             * 4.判断访问的状态码
             */
            if (statusCode != HttpStatus.SC_OK){
                System.err.println("请求出错：" + postMethod.getStatusLine());
            }

            /**
             * 5.处理HTTP响应内容
             */
            //HTTP响应头部信息，这里简单打印
            Header[] headers = postMethod.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 = postMethod.getResponseBody();
            response = new String(responseBody, charset);
            System.out.println("接口返回数据为：" + response);
            //读取为InputStream，在网页内容数据量大时候推荐使用
            //InputStream response = getMethod.getResponseBodyAsStream();
            return response;
        } catch (HttpException e) {
            //发生致命的异常，可能是协议不对或者返回的内容有问题
            System.out.println("请检查输入的URL!");
            e.printStackTrace();
            return "调用POST请求失败";
        } catch (IOException e){
            //发生网络异常
            System.out.println("发生网络异常!");
            e.printStackTrace();
            return "调用POST请求失败";
        }finally {
            /**
             * 6.释放连接
             */
            postMethod.releaseConnection();
        }
    }

//post请求示例
String result = HttpClientToInterface.doPost("http://127.0.0.1:8085/xxxx/xxxx?yy=yyyyyy&zz=zzzzzzz","UTF-8");

POST请求（JSON传参）

public static String doPost(String url, JSONObject json){
        try {
            CloseableHttpClient httpClient = HttpClientBuilder.create().build();
            HttpPost post = new HttpPost(url);

            // 首先Header部分需要设定字符集为：uft-8
            post.addHeader("Content-Type", "application/json;charset=utf-8");
            // 此处也需要设定
            post.setHeader("Accept", "*/*");
            post.setHeader("Accept-Encoding", "gzip, deflate, br");
//            post.setHeader("Accept-Language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
            post.setHeader("Connection", "keep-alive");
            post.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36");
            post.setEntity(new StringEntity(json.toString(), Charset.forName("UTF-8"))); //设置请求参数
            HttpResponse response = httpClient.execute(post);
            int statusCode = response.getStatusLine().getStatusCode();
            if (HttpStatus.SC_OK == statusCode){
                //返回String
                String res = EntityUtils.toString(response.getEntity());
                System.out.println(res);
                return res;
            }else{
                return "调用POST请求失败";
            }

        } catch (Exception e) {
            e.printStackTrace();
            return "调用POST请求失败";
        }
    }

//post请求示例-josn传参
 Map<String, Object> map = new HashMap<>();
 map.put("xxxx", "xxxxxx");
 map.put("xxxxx", "xxxxxx");
 JSONObject json = new JSONObject(map);

//以post形式请求接口
 String result = HttpClientToInterface.doPost("http://127.0.0.1:8085/xxxx/xxxxx/", json);
 JSONObject jsonObject = JSONObject.parseObject(result);
 String data = jsonObject.get("data").toString();

PUT请求（传TOKEN）文章来源地址https://www.toymoban.com/news/detail-768413.html

public static String doPut(String url,String token){
        try (CloseableHttpClient httpclient = HttpClients.createDefault()) {
            HttpPut httpPut = new HttpPut(url);
            //设置编码 , 设置token参数
            httpPut.addHeader("Authentication", token);
            // 首先Header部分需要设定字符集为：uft-8
            httpPut.addHeader("Content-Type", "application/json;charset=utf-8");
            // 此处也需要设定
            httpPut.setHeader("Accept", "*/*");
            httpPut.setHeader("Accept-Encoding", "gzip, deflate, br");
//            post.setHeader("Accept-Language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
            httpPut.setHeader("Connection", "keep-alive");
            httpPut.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36");
            //设置请求参数

            System.out.println("Executing request " + httpPut.getRequestLine());

            // Create a custom response handler
            ResponseHandler<String> responseHandler = response -> {
                int status = response.getStatusLine().getStatusCode();
                if (status >= 200 && status < 300) {
                    HttpEntity entity = response.getEntity();
                    return entity != null ? EntityUtils.toString(entity) : null;
                } else {
                    throw new ClientProtocolException("Unexpected response status: " + status);
                }
            };
            String responseBody = httpclient.execute(httpPut, responseHandler);
            System.out.println("接口返回数据为："+responseBody);
            return responseBody;
        } catch (IOException e) {
            e.printStackTrace();
            return "调用PUT请求失败";
        }
    }

//put请求示例
String result = HttpClientToInterface.doPut("http://127.0.0.1：8085/xxxx/xxxxx", token);

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JAVA调用第三方接口的GET/POST/PUT请求方式

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