HttpClient 3.1下载文件

最新推荐文章于 2024-10-24 11:33:37 发布

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#HttpClient #3.1 #下载 #文件

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本文介绍如何利用Apache HttpClient 3.1版本的Java客户端进行文件下载操作，并提供了完整的示例代码。示例中展示了如何配置HttpClient和GetMethod来从远程URL下载文件，并将文件保存到本地磁盘。

项目有点老，用的HttpClient 3.1

需要有的Jar;
    * commons-httpclient-3.1.jar
    * commons-logging-1.04.jar
    * commons-codec-1.3.jar

public class HttpClientTest {   
       
    private final static String REMOTE_FILE_URL = "http://www.gjt.org/download/time/java/tar/javatar-2.5.tar.gz";   
       
    private final static int BUFFER = 1024;   
  
    public static void main(String[] args) {   
  
       HttpClient client = new HttpClient();   
       GetMethod httpGet = new GetMethod(REMOTE_FILE_URL);   
        try {   
            client.executeMethod(httpGet);   
               
            InputStream in = httpGet.getResponseBodyAsStream();   
              
            FileOutputStream out = new FileOutputStream(new File("E:\\test_jar\\javatar-2.5.tar.gz"));   
              
            byte[] b = new byte[BUFFER];   
            int len = 0;   
            while((len=in.read(b))!= -1){   
                out.write(b,0,len);   
            }   
            in.close();   
            out.close();   
               
        }catch (HttpException e){   
            e.printStackTrace();   
        } catch (IOException e) {   
            e.printStackTrace();   
        }finally{   
            httpGet.releaseConnection();   
        }   
        System.out.println("download, success!!");   
       }   
}

参考了：

http://kukuqiu.iteye.com/blog/343019