用url类获取指定url页面的内容

package demo1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.http.client.ClientProtocolException;

public class Test1 {
public static void main(String[] args) throws ClientProtocolException, IOException {
URL url=new URL("http://www.baidu.com");
HttpURLConnection httpurlconnection=(HttpURLConnection) url.openConnection();
InputStream is=httpurlconnection.getInputStream();

BufferedReader breader=new BufferedReader(new InputStreamReader(is,"utf-8"));
String line="";
while((line=breader.readLine())!=null)
{
System.out.println(line);
}
}

}