httpclient4.3 模拟表单提交文件

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<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.3.6</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpmime</artifactId><version>4.3.6</version></dependency>

package com.test;import java.io.File;import java.io.IOException;import java.nio.charset.Charset;import org.apache.http.Consts;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.ContentType;import org.apache.http.entity.mime.MultipartEntityBuilder;import org.apache.http.entity.mime.content.FileBody;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;      public class ClientMultipartFormPost {        /**      * 这个例子展示了如何执行请求包含一个多部分编码的实体      * 模拟表单提交      * @throws IOException       */      public static void main(String[] args) throws IOException {          CloseableHttpClient httpClient = HttpClients.createDefault();          try{              //要上传的文件的路径              String filePath = "/Users/jjs/Downloads/feedbak_image.jpg";              //把一个普通参数和文件上传给下面这个地址    是一个servlet              HttpPost httpPost = new HttpPost("http://localhost:8080/feedback/add");              //把文件转换成流对象FileBody              FileBody bin = new FileBody(new File(filePath));              //普通字段  重新设置了编码方式              StringBody content = new StringBody("这里是一个评论", ContentType.create("text/plain", Consts.UTF_8));              //StringBody comment = new StringBody("这里是一个评论", ContentType.TEXT_PLAIN);                            HttpEntity reqEntity = MultipartEntityBuilder.create()              .addPart("media", bin)//相当于<input type="file" name="media"/>              .addPart("content", content)              .build();                            httpPost.setEntity(reqEntity);                            System.out.println("发起请求的页面地址 " + httpPost.getRequestLine());              //发起请求   并返回请求的响应              CloseableHttpResponse response = httpClient.execute(httpPost);              try {                  System.out.println("----------------------------------------");                  //打印响应状态                  System.out.println(response.getStatusLine());                  //获取响应对象                  HttpEntity resEntity = response.getEntity();                  if (resEntity != null) {                      //打印响应长度                      System.out.println("Response content length: " + resEntity.getContentLength());                      //打印响应内容                      System.out.println(EntityUtils.toString(resEntity,Charset.forName("UTF-8")));                  }                  //销毁                  EntityUtils.consume(resEntity);              } finally {                  response.close();              }          }finally{              httpClient.close();          }      }    }

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