Java实现以form-data形式文件上传到服务器-Toy模板网

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package com.joolun.cloud.mall.common.util;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Map;

@Slf4j
public class HttpFileUtil {
		/**
		 * 以post方式调用第三方接口,以form-data 形式  发送 MultipartFile 文件数据
		 * @param url  post请求url
		 * @param fileParamName 文件参数名称
		 * @param multipartFile  文件
		 * @param paramMap  文件之外其他参数
		 */
		public static String doPostFormData(String url, String fileParamName, MultipartFile multipartFile, Map<String, String> paramMap) {
			log.info("文件参数名称"+fileParamName);
			// 创建Http实例
			CloseableHttpClient httpClient = HttpClients.createDefault();
			// 创建HttpPost实例
			HttpPost httpPost = new HttpPost(url);
			// 请求参数配置
			RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(60000).setConnectTimeout(60000)
					.setConnectionRequestTimeout(10000).build();
			httpPost.setConfig(requestConfig);
			//请求头设置
			try {
				MultipartEntityBuilder builder = MultipartEntityBuilder.create();
				builder.setCharset(StandardCharsets.UTF_8);
				builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
				String fileName = multipartFile.getOriginalFilename();
				// 文件流
				builder.addBinaryBody(fileParamName, multipartFile.getInputStream(), ContentType.MULTIPART_FORM_DATA, fileName);
				//表单中其他参数，如果没有其他参数可以注释该部分
				for(Map.Entry<String, String> entry: paramMap.entrySet()) {
					builder.addPart(entry.getKey(),new StringBody(entry.getValue(), ContentType.create("text/plain", Consts.UTF_8)));
				}
				log.info("builder"+builder);
				HttpEntity entity = builder.build();
				httpPost.setEntity(entity);

				log.info("请求url："+url);
				log.info("请求参数："+paramMap.toString());
				// 执行提交
				HttpResponse response = httpClient.execute(httpPost);
				if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
					// 返回
					String res = EntityUtils.toString(response.getEntity(), StandardCharsets.UTF_8);
					log.info("请求返回数据"+res);
					JSONObject resJson= JSON.parseObject(res);
					if ("200".equals(resJson.get("code").toString())) {
						JSONObject data = (JSONObject) resJson.get("data");
						return data.get("fileUrl").toString();
					}
					return res;
				}
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				if (httpClient != null) {
					try {
						httpClient.close();
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
			return null;
		}
	}