从指定网址下载网页

import java.net.URL;
import java.net.URLConnection;
import java.io.IOException;
import java.util.Date;

public class urlc
{
void display()
{
byte buf[]=new byte[100];

try
{
System.out.print("输入文URL地址: ");
//读户输入URL
int ount=System.in.read(buf);

String addr=new String
(buf,0,count);

//户输入URL字符串传入URL类象
URL url=new URL (addr);
//创建URLConnection象，URLopenConnection连接返回给URLConnection象
//实际URLopenConnection返回值就个URLConnection
URLConnection c = url.openConnection();
//URLConnectionconnect()建立连接
c.connect();
// 显示该连接相关信息，这些都URLConnection
System.out.println("容类型: "+c.getContentType());
System.out.println("容编码: "+c.getContentEncoding());
System.out.println("容长度: "+c.getContentLength());
System.out.println("创建日期: "+new Date(c.getDate()));
System.out.println("最修改日期: "+new Date(c.getLastModified()));
System.out.println("终止日期: "+new Date(c.getExpiration()));

}

catch (IOException e)
{
System.out.println(e);
}

}

public static void main(String[] args)
{
urlc app=new urlc();
app.display();
}
}