Java获取url地址图片

package com.listings.web.controller;
 
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Date;
 
public class CatchPic {
     public static boolean saveUrlAs(String fileUrl, String savePath)/* fileUrl网络资源地址 */  
        {  
       
            try {  
                /* 将网络资源地址传给,即赋值给url */  
                URL url = new URL(fileUrl);  
                   
                /* 此为联系获得网络资源的固定格式用法，以便后面的in变量获得url截取网络资源的输入流 */  
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();  
                DataInputStream in = new DataInputStream(connection.getInputStream());  
                   
                /* 此处也可用BufferedInputStream与BufferedOutputStream  需要保存的路径*/  
                DataOutputStream out = new DataOutputStream(new FileOutputStream(savePath));  
                   
                   
                /* 将参数savePath，即将截取的图片的存储在本地地址赋值给out输出流所指定的地址 */  
                byte[] buffer = new byte[4096];  
                int count = 0;  
                while ((count = in.read(buffer)) > 0)/* 将输入流以字节的形式读取并写入buffer中 */  
                {  
                    out.write(buffer, 0, count);  
                }  
                out.close();/* 后面三行为关闭输入输出流以及网络资源的固定格式 */  
                in.close();  
                connection.disconnect();  
                return true;/* 网络资源截取并存储本地成功返回true */  
       
            } catch (Exception e) {  
                System.out.println(e + fileUrl + savePath);  
                return false;  
            }  
        }  
       
        public static void main(String[] args) {  
            CatchPic pic = new CatchPic();/* 创建实例 */  
               
            //需要下载的URL  
            String photoUrl = "http://photos.listhub.net/GAMLS/07442715/25?lm=20150426T002920";  
       
            // 截取最后/后的字符串  
            String fileName = new Date().getTime()+".png";  
               
            //图片保存路径  
            String filePath = "D:/img/";  
               
            /* 调用函数，并且进行传参 */  
            boolean flag = pic.saveUrlAs(photoUrl, filePath + fileName);  
               
            System.out.println("Run ok!\n Get URL file " + flag);  
            System.out.println(filePath);  
            System.out.println(fileName);  
        }  
 
}