contentdisplay.java

一个实现网络会议的软件.包含三个包.其中一个包需JMF的支持.

package clientPackage;
import mediaPackage.*;
import java.awt.Point;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.*;

public class ContentDisplay extends JEditorPane{

	private static final String SERVER = "127.0.0.1";
	public void addPropertyChangeListener(ClientUI clientUI) {
		// TODO Auto-generated method stub
		
	}

	public void showFile(String newURL) {
		getThePage(newURL);
	}
	private void getThePage(String url){
		String fileName=null;
		if (url.indexOf("file:") != -1)
			try{
				fileName=getFileName(url);
				System.out.println("file name is:"+fileName);
				FileInputStream fileIn=new FileInputStream("E:/slides/"+fileName);
				fileIn.close();
			}catch(FileNotFoundException e0){
				System.out.println("file not exist,download the file from server now!");
				try{
					Socket socket=new Socket(SERVER,Constants.FILEPORT);
					ObjectOutputStream output=new ObjectOutputStream(socket.getOutputStream());
					FileOutputStream out=new FileOutputStream("E:/slides/"+fileName);
					BufferedInputStream in=new BufferedInputStream(socket.getInputStream());
					output.writeObject(fileName);
					//output.close();
					int ch;
					while ((ch=in.read())!=-1) out.write(ch);
					out.close();
					in.close();
					socket.close();
					System.out.println("downloading file successfully");
				}catch(Exception e2){
					System.err.println("error in downloading file"+e2.getMessage());
					e2.printStackTrace();
					return;
				}
			}catch(IOException e1){
				System.err.println("ioexception in setpage");
			}
		try{
			setPage(url);
		}catch(IOException e0){
			System.err.println("can not get the page!"+url);
		}
	}
	public void drawRedDot(Point point) {
		// TODO Auto-generated method stub
		
	}
	private String getFileName(String urlStr)
	{
		if (urlStr == "" || urlStr == null)
		{
			System.out.println("In contentDisplay class: URL is empty.");
			return null;
		}
		
		int nameStartIndex = urlStr.lastIndexOf("/");
		if(nameStartIndex == -1)
			nameStartIndex = urlStr.lastIndexOf("\\");		
		if(nameStartIndex == -1)
			nameStartIndex = urlStr.lastIndexOf("//");
		
		String fileName = null;
		if(nameStartIndex != -1)
			fileName = urlStr.substring(nameStartIndex + 1);
		else
		{
			System.out.println("URL form error: " + urlStr 
					+ "\n URL should be in the form of protocol://Path/FileName");
		}
		return fileName;
	}

}