JAVA程序网络图片下载

package action;

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 {
/* 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) {
Getpic pic = new Getpic();/* 创建实例 */

//需要下载的URL
String photoUrl = "http://hiphotos.baidu.com/yanshennan/pic/item/03a505c8bcbaf6557f3e6f8a.jpg";

// 截取最后/后的字符串
String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));

//图片保存路径
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);
}

}