Socketclient与服务端

package test;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
class ThreadSocket implements Runnable{
	private Socket client = null ;
	public ThreadSocket(Socket client){
		this.client = client ;
	}
	public void run(){
		BufferedReader buf = null ;	// 接收输入流
		PrintStream out = null ;		// 打印流输出最方便
		try{
			out = new PrintStream(client.getOutputStream()) ;
			// 准备接收客户端的输入信息
			buf = new BufferedReader(new InputStreamReader(client.getInputStream())) ;
			boolean flag = true ;	// 标志位。表示能够一直接收并回应信息
			while(flag){
				String str = buf.readLine() ;		// 接收客户端发送的内容
				if(str==null||"".equals(str)){	// 表示没有内容
					flag = false ;	// 退出循环
				}else{
					if("bye".equals(str)){	// 假设输入的内容为bye表示结束
						flag = false ;
					}else{
						out.println("ECHO : " + str) ;	// 回应信息
					}
				}
			}
			client.close() ;
		}catch(Exception e){}
 
	}
}
public class Test {  
 
    public static void main(String[] args) throws IOException {
    	server3();
    }
 
    public static void server3() throws IOException{
    	ServerSocket server=new ServerSocket(8888);
    	while(true){
    		Socket client=server.accept();
    		new Thread(new ThreadSocket(client)).start();
    	}
    }
    public static void server2() throws IOException{
    	ServerSocket server=new ServerSocket(8888);
    	Socket client=server.accept();
    	boolean flag=true;
    	while(flag){
    		BufferedReader in=new BufferedReader(new InputStreamReader(client.getInputStream()));
    		PrintStream print=new PrintStream(client.getOutputStream());
        	boolean f=true;
        	while(f){
        		String str=in.readLine();
        		if(str==null||"".equals(str)){
        			f=false;
        		}else{
        			if("bye".equals(str)){
        				f=false;
        			}else{
        				print.println("Echo::"+str);
        			}
        		}
            	print.print(str);
        	}
        	print.close();
    	}
    	client.close();
    	server.close();
    }
    public static void server1() throws IOException{
    	ServerSocket server=new ServerSocket(8888);
    	Socket client=server.accept();
    	PrintStream print=new PrintStream(client.getOutputStream());
    	String str="Hello world";
    	print.print(str);
    	print.close();
    	client.close();
    	server.close();
    }
 
    /**
     *baidu的IP地址：119.75.217.109
 
     */
}

package test;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
 
public class Socket01{
	public static void main(String args[]) throws IOException{
		Socket socket=new Socket("localhost",8888);
		BufferedReader buf=new BufferedReader(new InputStreamReader(socket.getInputStream()));
		BufferedReader input=new BufferedReader(new InputStreamReader(System.in));
		PrintStream out=new PrintStream(socket.getOutputStream());
		boolean flag = true ;		// 定义标志位
		while(flag){
			System.out.print("输入信息：") ;
			String str = input.readLine() ;	// 接收键盘的输入信息
			out.println(str) ;
			if("bye".equals(str)){
				flag = false ;
			}else{
				String echo = buf.readLine() ;	// 接收返回结果
				System.out.println(echo) ;	// 输出回应信息
			}
		}
		buf.close();
		out.close();
		input.close();
		socket.close();
	}
 
};
/**
read1():
hello
read2():
hello
hello
**/