HttpClient 实现文件上传

最新推荐文章于 2025-07-11 14:43:47 发布

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最新推荐文章于 2025-07-11 14:43:47 发布

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分类专栏： JAVA Web 文章标签： HttpClient Upload 上传

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本文提供了一个使用Apache HttpClient进行文件上传的完整示例代码，包括设置超时时间和字符编码，并展示了如何通过Spring MVC接收文件。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

其实搜索可以找到很多例子但是基本没有超时设置和编码设置。

我主要也是添加代码做一个完整的例子。帮助大家也留给自己

上代码：

  import org.apache.http.HttpEntity;

  @ResponseBody
  @RequestMapping(value = "/uploadRequest.do", produces = "application/json; charset=utf-8")
  public String uploadRequest(HttpServletRequest request, MultipartFile file) throws IOException {Map<String, String> reqData = CgtUtil.getParameterMap(request);
    String result = "";

    String url = "http://***.com";

    CloseableHttpClient httpClient = HttpClients.createDefault();
    CloseableHttpResponse response = null;

    try{
      HttpPost httpPost = new HttpPost(url);
      //设置超时时间
      RequestConfig requestConfig = RequestConfig.custom()
          .setConnectTimeout(3000)
          .setSocketTimeout(5000).build();
      httpPost.setConfig(requestConfig);
      MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();

      //拼接普通的参数
      //设置文本编码
      ContentType contentType = ContentType.create("text/plain", "UTF-8");
      for (String key : reqData.keySet()) {
        multipartEntityBuilder.addTextBody(key, reqData.get(key), contentType);
      }
      //拼接文件 此处大多少都是用File来添加文件 由于springmvc传递文件到后台只有InputStream
      // 所以这里用addBinaryBody方法 
      // 注意： 一定要添加 ContentType.create(file.getContentType()), file.getOriginalFilename() 否则找不到文件
      multipartEntityBuilder.addBinaryBody("file", file.getInputStream(),
          ContentType.create(file.getContentType()), file.getOriginalFilename());
      HttpEntity httpEntity = multipartEntityBuilder.build();
      httpPost.setEntity(httpEntity);

      response = httpClient.execute(httpPost);

      int status = response.getStatusLine().getStatusCode();
      if (status == HttpStatus.SC_OK) {
        HttpEntity resEntity = response.getEntity();

        //获取响应内容
        result = EntityUtils.toString(resEntity, Charset.forName("UTF-8"));

        //销毁响应内容
        EntityUtils.consume(resEntity);
      } else {
        logger.info("返回http状态码["+status+"]，请检查请求报文或者请求地址是否正确");
      }
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (null != response) {
        response.close();
      }
      if (null != httpClient) {
        httpClient.close();
      }
    }

    return result;
  }

jar包

<dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
      <version>4.5.1</version>
    </dependency>
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpmime</artifactId>
      <version>4.5.1</version>
    </dependency>