java读取网络上的图片并保存到本地，图片文件名不变
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://hiphotos.baidu.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); }}?