依赖jar包:httpclient-4.4.jar、httpcore-4.4.jar、httpmime-4.4.x.jar </div>

 

[Java]代码    

/**   * httpclient4.x 文件上传   *    * Example how to use multipart/form encoded POST request.   */  public class ClientMultipartFormPost {        public static void main(String[] args) {    String url = "http://localhost:8080/fileRequest";    File file = new File("/home/opt/fileUpload/A.zip");          CloseableHttpClient httpclient = HttpClients.createDefault();          try {              HttpPost httppost = new HttpPost(url);     MultipartEntityBuilder builder = MultipartEntityBuilder.create();     //others param for request     StringBody stringFileNameBody = new StringBody("fileName", ContentType.create("text/plain", "UTF-8"));     builder.addPart(name, stringFileNameBody);     StringBody stringFileMd5 = new StringBody("md5", ContentType.create("text/plain", "UTF-8"));     builder.addPart(name, stringFileMd5);          //file param for request     String fileRequestParam = "file";     FileBody fileBody = new FileBody(file, ContentType.create("multipart/form-data", "UTF-8"));     builder.addPart(fileRequestParam, fileBody);          HttpEntity reqEntity = builder.build();              httppost.setEntity(reqEntity);              System.out.println("executing request " + httppost.getRequestLine());              CloseableHttpResponse response = httpclient.execute(httppost);                System.out.println(response.getStatusLine());     HttpEntity resEntity = response.getEntity();     if (resEntity != null) {      System.out.println("Response content length: " + resEntity.getContentLength());     }     EntityUtils.consume(resEntity);                     } catch(Exception e){     e.printStackTrace();    }finally {             try {      EntityUtils.consume(resEntity);     } catch (IOException e) {      e.printStackTrace();     }     if (response != null) {      try {       response.close();      } catch (IOException e) {       e.printStackTrace();      }     }          }      }    }