通过HttpPost发送http请求实现文件上传

通过HttpPost发送http请求，实现postman上传文件效果

需要引入：

  
      org.apache.httpcomponents
      httpclient
      4.5.12
  
  
      org.apache.httpcomponents
      httpmime
      4.5.12
  

** 关键代码：multipartEntityBuilder.addBinaryBody **

 
  public static String sendPost(String url, MultipartFile file) {
      // 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);
          MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
          multipartEntityBuilder.setMode(HttpMultipartMode.RFC6532);   // 处理中文文件名称乱码
          multipartEntityBuilder.setCharset(Charset.forName("UTF-8"));
          multipartEntityBuilder.addBinaryBody("file", file.getInputStream(), ContentType.MULTIPART_FORM_DATA, file.getName());
          multipartEntityBuilder.addTextBody("comment", file.getName());
          HttpEntity httpEntity = multipartEntityBuilder.build();
          httpPost.setEntity(httpEntity);
          // 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;
  }

如还需传入其他文本参数：如下图

本人亲自验证有效。