Java从服务器下载图片保存到本地

package me.cj.test1;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class TestFileInputStream1 {
    public static void main(String[] args) {
         HttpURLConnection conn = null;
         InputStream inputStream = null;
         BufferedInputStream bis = null;
         FileOutputStream out = null;
         try
        {
            File file0=new File("D:\\test111");
            if(!file0.isDirectory()&&!file0.exists()){
                file0.mkdirs();
            }
            out = new FileOutputStream(file0+"\\2.jpg");
            // 建立链接
            URL httpUrl=new URL("http://172.16.6.111/dfs/group1/M00/01/19/rBAGb1tYWC-ALvf4AAErJEekP8U334.jpg");
            conn=(HttpURLConnection) httpUrl.openConnection();
            //以Post方式提交表单，默认get方式
            conn.setRequestMethod("GET");
            conn.setDoInput(true);  
            conn.setDoOutput(true);
            // post方式不能使用缓存 
            conn.setUseCaches(false);
            //连接指定的资源 
            conn.connect();
            //获取网络输入流
            inputStream=conn.getInputStream();
            bis = new BufferedInputStream(inputStream);
            byte b [] = new byte[1024];
            int len = 0;
            while((len=bis.read(b))!=-1){
                out.write(b, 0, len);
            }
            System.out.println("下载完成...");
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                if(out!=null){
                    out.close();
                }
                if(bis!=null){
                    bis.close();
                }
                if(inputStream!=null){
                    inputStream.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        
    }
}