HttpClient如何进行文件上传呢？

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转自:

http://www.java265.com/JavaCourse/202204/2938.html

HttpClient是一个java语言编写的包，

我们使用HttpClient可以非常方便的发送Http请求

它使基于Http协议请求内容变得非常简单

HttpClient是Apache Jakarta Common下的子项目 它里面封装了很多使用http协议访问的工具，可用于高效访问http

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下文笔者讲述基于HttpClient Utils工具类编写一个文件上传的示例分享，如下所示:

HttpClient Utils进行表单进行文件上传的示例分享，如下所示
实现思路:
    1.获取连接
	2.声明一个HttpPost
	3.创建上传体FileBody
	4.定义一个HttpEntity传送文件
	5.execute执行上传操作
	6.获取返回信息
	7.关闭连接

/** 
     * 上传文件 
     */   
    public void upload() {   
        CloseableHttpClient httpclient = HttpClients.createDefault();   
        try {   
            HttpPost httppost = new HttpPost("http://java265.com/uploadFile");   
     
            FileBody bin = new FileBody(new File("F:\image\sendpix0.jpg"));   
            StringBody comment = new StringBody("A binary file of some kind", ContentType.TEXT_PLAIN);   
     
            HttpEntity reqEntity = MultipartEntityBuilder.create().addPart("bin", bin).addPart("comment", comment).build();   
     
            httppost.setEntity(reqEntity);   
     
            System.out.println("executing request " + httppost.getRequestLine());   
            CloseableHttpResponse response = httpclient.execute(httppost);   
            try {   
   System.out.println("----------------------------------------");   
   System.out.println(response.getStatusLine());   
   HttpEntity resEntity = response.getEntity();   
   if (resEntity != null) {   
       System.out.println("Response content length: " + resEntity.getContentLength());   
   }   
   EntityUtils.consume(resEntity);   
            } finally {   
   response.close();   
            }   
        } catch (ClientProtocolException e) {   
            e.printStackTrace();   
        } catch (IOException e) {   
            e.printStackTrace();   
        } finally {   
            try {   
   httpclient.close();   
            } catch (IOException e) {   
   e.printStackTrace();   
            }   
        }   
    }