Java Socket编程 标准范例（多线程）

链接地址：http://blog.csdn.net/benweizhu/article/details/6615542

服务器端（Server）非多线程

package com.zeph.serverclient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class MyServer {
    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(5678);
        Socket client = server.accept();
        BufferedReader in = new BufferedReader(new InputStreamReader(
                client.getInputStream()));
        PrintWriter out = new PrintWriter(client.getOutputStream());
        while (true) {
            String str = in.readLine();
            System.out.println(str);
            out.println("has receive....");
            out.flush();
            if (str.equals("end"))
                break;
        }
        client.close();
    }
}

客户端（Client）

package com.zeph.serverclient;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;

public class MyClient {
    static Socket server;

    public static void main(String[] args) throws Exception {
        server = new Socket(InetAddress.getLocalHost(), 5678);
        BufferedReader in = new BufferedReader(new InputStreamReader(
                server.getInputStream()));
        PrintWriter out = new PrintWriter(server.getOutputStream());
        BufferedReader wt = new BufferedReader(new InputStreamReader(System.in));
        while (true) {
            String str = wt.readLine();
            out.println(str);
            out.flush();
            if (str.equals("end")) {
                break;
            }
            System.out.println(in.readLine());
        }
        server.close();
    }
}

服务器端（Server）多线程

package com.zeph.multiclient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class MultiClient extends Thread {
    private Socket client;

    public MultiClient(Socket c) {
        this.client = c;
    }

    public void run() {
        try {
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    client.getInputStream()));
            PrintWriter out = new PrintWriter(client.getOutputStream());
            // Mutil User but can't parallel

            while (true) {
                String str = in.readLine();
                System.out.println(str);
                out.println("has receive....");
                out.flush();
                if (str.equals("end"))
                    break;
            }
            client.close();
        } catch (IOException ex) {
        } finally {
        }
    }

    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(5678);
        while (true) {
            // transfer location change Single User or Multi User

            MultiClient mc = new MultiClient(server.accept());
            mc.start();
        }
    }
}

测试这个代码的时候可以直接用DOS控制台上面运行，这样看的效果更清楚！

服务器基本步骤：

1.指定端口实例化一个SeverSocket

2.调用ServerSocket的accept()方法，以在等待连接期间造成阻塞

3.获取位于该底层的Socket的流以进行读写操作

4.将数据封装成流

5.对Socket进行读写

6.关闭打开的流

客户端基本步骤：

1.通过IP地址和端口实例化Socket，请求连接服务器

2.获得Socket上的流以进行读写

3.把流封装进BufferedReader/PrintWriter的实例

4.对Socket进行读写

5.关闭打开的流