通过HttpPost发送http请求实现文件上传-Toy模板网

这篇具有很好参考价值的文章主要介绍了通过HttpPost发送http请求实现文件上传。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

通过HttpPost发送http请求，实现postman上传文件效果

需要引入：

  <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
      <version>4.5.12</version>
  </dependency>
  <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpmime</artifactId>
      <version>4.5.12</version>
  </dependency>

** 关键代码：multipartEntityBuilder.addBinaryBody **

 /**
  * 发送post请求 （上传文件）
  * @param url
  * @param file
  * @return
  */
  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;
  }