JAVA程序下载网络图片

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);   }    }