dictionaryclient.java

一个java 在线字典程序 实现客户端在线查词

import java.net.*;
import java.io.*;
import java.util.*;
public class DictionaryClient 
{
        private static String serverName="localhost";
        private static int port=4500;
        public static void main(String[] args)  
        {
	String meaning=null;
	try
	{
		if(args.length==0)
			throw new Exception("No parameters, use default setting");
		else if(args.length!=2)
			throw new Exception("Please input 2 parameters!");
		else
		{
			serverName=args[0];
			port=Integer.parseInt(args[1]);
		}
	}
	catch (Exception e)
	{
		String message= e.getMessage();
		System.out.println(message);
	}
	System.out.println("Strat using DictionaryClient");
	Scanner keyboard=new Scanner(System.in);
	boolean exit=false;
	while(!exit)
	{
		System.out.println("Please input a word");
		System.out.println("If you want to exit, input the word: exit!");
		String inputword=keyboard.nextLine();
		if(inputword.equalsIgnoreCase("exit"))
		{
			exit=true;
		} 
		else
		{
		    meaning=DictionarySearch(inputword,meaning);
		    if(meaning.equals("no"))
		    {
			System.out.println("The dictionary does not have this word!");
		    }
		    else
		    {
			System.out.println(inputword+" means "+meaning);
		        System.out.println();
		    }
		 }
		    
	}
}
public static String DictionarySearch(String keyword, String meaning)
{
	String result="no";
	try
	{
		
		Socket client=new Socket(serverName,port);
		DataInputStream cinputstream = new DataInputStream(client.getInputStream());
		DataOutputStream coutputstream = new DataOutputStream(client.getOutputStream());
		coutputstream.writeUTF(keyword);
		String explanation = new String (cinputstream.readUTF());
		result = explanation;
		
		cinputstream.close();
		coutputstream.close();
		client.close();
	}
	catch(UnknownHostException uhe) 
	{ 
	    System.out.println("Unknown host: " + serverName);
	    uhe.printStackTrace(); 
	} 
	catch(IOException ioe) 
	{ 
	    System.out.println("IOException: " + ioe); 
	    ioe.printStackTrace(); 
	} 	
	return result;
}

}