clientio.java

来自「JAVA实现的聊天工具,可以容纳最多10个用户 1.本系统需要JDK1.5 」· Java 代码 · 共 82 行

import java.io.*;

public class ClientIO{
	//private static String friendsFile="clientFriendsDatabase";
	//private static ObjectOutputStream oos=null;
	//private static ObjectInputStream ois=null;

	/* called by connectServer() in ClientControlThread;
	 * if no key match the client's id,then the client is new-user
	 * on the system in this computer,then setup a new database for 
	 * it. if there is a matching key,then load the database
	 */
	/*static FriendsDatabase readFriendsDatabase(long key){
		FriendsDatabase fd=null;
		if(!checkFile(friendsFile+String.valueOf(key))) //if file doesn't exit
			return new FriendsDatabase(key); //return new database
		else{
			if((fd=(FriendsDatabase)readFromDatabase(friendsFile+String.valueOf(key)))!=null){
				return fd;								
			}
		return new FriendsDatabase(key); //return new database
		}
	}
	
	static void writeFriendsDatabase(Object o,String fileName){
		writeToDatabase(o,fileName);
	}
	
	static boolean checkFile(String fileName){ // to check if none of data has been written in
		File temp=new File(fileName);
		boolean signal=temp.exists();
		if(!signal) //file doesn't exit,the initial status
			return false;
		else return true;
	}*/
	
	static int getInt(){
		return Integer.parseInt(getString());
	}
	
	static long getLong(){
		return Long.parseLong(getString());
	}

	static String getString(){
		BufferedReader br; 
		br=new BufferedReader(new InputStreamReader(System.in));
        try{
        	return br.readLine();
        }
        catch(IOException e){
			System.out.println(e+" "+e.getMessage());
			return null;
		}
	}
	
	/*private static void writeToDatabase(Object end,String fileName){		
		try{
			oos=new ObjectOutputStream(
					new FileOutputStream(fileName));
			oos.writeObject(end);
			oos.flush();
			oos.close();
		}
               catch(IOException e){
			System.out.println(e+" "+e.getMessage());
		}
	}
	
	private static Object readFromDatabase(String fileName){		
		try{
			ois=new ObjectInputStream(new FileInputStream(fileName));
			Object o=ois.readObject();
			ois.close();
			return o;
		}
       catch(Exception e){
			System.out.println(e+" "+e.getMessage());
			return null;
		}
	}*/
}