writeurlconnection.java

java课件及例程有一些PPT及一些例程

import java.net.*;
import java.io.*;
public class WriteURLConnection{
    public static void main(String[] args){
    	try{
            URL theUrl = new URL("file:///d:/javaExam/write.html");            
            URLConnection urlConn = theUrl.openConnection();                       
            BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
            String s;
            System.out.println("文件类型为:"+urlConn.getContentType());
            System.out.println("文件长度为:"+urlConn.getContentLength());
            int i = 0;
            while((s=urlConn.getHeaderFieldKey(i))!=null){
                System.out.println(s+" is: "+urlConn.getHeaderField(s));
                i++;
            }
            System.out.println("文件write.java的类型为:" + URLConnection.guessContentTypeFromName("write.java"));
            System.out.println("文件write.gif的类型为:" + URLConnection.guessContentTypeFromName("write.gif"));
	    System.out.println("域doInput的值为:" + urlConn.getDoInput());
            while ((s = in.readLine())!= null){
                System.out.println(s);
            }
            in.close();
            /*urlConn.setDoOutput(true);          
            BufferedWriter out = new BufferedWriter(new OutputStreamWriter(urlConn.getOutputStream()));
            String a = "hi,this is the URLConnection test!";
            //out.write(a,0,a.length()); 
            out.close(); */
        }catch(Exception e){
            System.out.println(e.toString());
        }
    }
}