读取网络上的图片并保存到本机，图片文件的文件名不变

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class Getpic{
public Getpic(){
}

public static boolean saveUrlAs(String fileUrl, String savePath)/*fileUrl网络资源地址*/
{

try
{
URL url = new URL(fileUrl);/*将网络资源地址传给,即赋值给url*/
/*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*/
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)
{
Getpic pic = new Getpic();/*创建实例*/
String  photoUrl = "http://ww.XXX.com/yanshennan/pic/item/03a505c8bcbaf6557f3e6f8a.jpg";
/*photoUrl.substring(photoUrl.lastIndexOf("/")的方法将返回最后一个符号为
* ‘/’后photoUrl变量中的所有字符，包裹此自身符号*/
String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));
String filePath = "E:";
/*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);
}

}