readurl.java

介绍有关java的资料 课件 相当一本书籍 里面都是很基础的知识

/**
 * Title:        Java网络编程演示
 * Description:  Java网络编程演示，用于北京师范大学计算机系Java课程教学示范。
 * Copyright:    Copyright (c) 2001
 * Company:      北京师范大学计算机系
 * @author 孙一林
 * @version 1.0
 */

import java.io.*;
import java.net.*;
public class ReadURL {
public ReadURL() { }
  public static void main(String args[]) {
    URL url = null;
    InputStream in= null;
    try {
	System.out.println("Creating URL...");
	url = new URL(args[0]);                   // "http://www.bnu.edu.cn"
	System.out.println("Opening Stream...");
	in = url.openStream();
	DataInputStream buffer = new DataInputStream(in);
	System.out.println("Reading data...");
	String lineOfData;
	while( (lineOfData = buffer.readLine()) != null ) {
		System.out.println("LINE: "+lineOfData);
	}
    }
    catch( MalformedURLException e) {
	System.out.println("Bad URL");
    }
    catch( IOException e) {
	System.out.println("IO Error "+e.getMessage());
    }
    finally {
	if(in != null)
          try {
	    in.close();
  	    System.out.println("Stream Closed.");
          }
  	  catch( IOException e ) { }
        }
        System.exit(0);
    }
  }