urlconnection.java.bak

Java程序设计培训教程2

import java.net.*;
import java.io.*;
public class UrlConnection{
	public static void main(String args[]){
		try{
			/*声明字符串变量strVar,用于读取一行信息*/
			String strVar;
			/*声明url对象，该对象将连接到清华主页上*/
			URL urlObj = new URL("http://www.tsinghua.edu.cn");
			/*通过URL对象的openConnection()方法生成URLConnection类的对象*/
			URLConnection conObj = urlObj.openConnection();
			/*将通过URLConnection对象的getInputStream()方法获得的InputStream对象赋给streamObj*/
			InputStream InStrObj = conObj.getInputStream();
			/*通过上面的InStrObj生成InputStreamReader类对象readerObj*/
			InputStreamReader readerObj = new InputStreamReader(InStrObj);
			/*生成BufferedReader类对象buffObj*/
			BufferedReader buffObj      = new BufferedReader(readerObj);
			/*while循环用于读取URL对象指定的HTML文件内容，按行读取*/
			while((strVar = buffObj.readLine())!=null)
				System.out.println(strVar);
			/*下面的语句将连接关闭*/
			buffObj.close();
		}catch(MalformedURLException e){
			System.err.println("url error");
		}catch(IOException e){
			System.out.println("IO error");
		}		
	}
}