上一节实现了client像server端发送请求。本节将实现server端向client回传信息。实现原理非常easy，在原来的基础上。在server端实现输出流，在client实现输入流就可以，详细代码例如以下：
server端：
package com.socket.demo;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static void main(String[] args) {
try{
ServerSocket serverSocket=new ServerSocket(8888);
System.out.println("----------------服务端执行。開始监听请求----------------");
Socket socket=serverSocket.accept();//開始监听
InputStream inputStream=socket.getInputStream();
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream));
//获取请求内容
String info;
while ((info=bufferedReader.readLine())!=null) {
System.out.println("我是server端。client请求为："+info);
}
socket.shutdownInput();
//server端向client回传信息
OutputStream outputStream=socket.getOutputStream();
PrintWriter printWriter=new PrintWriter(outputStream);
printWriter.write("client您好。我已经接受到你的信息");
printWriter.flush();
//关闭资源
printWriter.close();
outputStream.close();
bufferedReader.close();
inputStream.close();
socket.close();
serverSocket.close();
}catch(Exception exception){
}
}
}
client：
package com.socket.demo;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class Client {
public static void main(String[] args) {
try {
//发送到8888端口
Socket socket=new Socket("127.0.0.1", 8888);
//输出流
OutputStream outputStream=socket.getOutputStream();
PrintWriter printWriter=new PrintWriter(outputStream);
printWriter.write("server端你好，我是client。
"); printWriter.flush(); socket.shutdownOutput();//这个不能少。！
！
！
！！！。！！。！
！
！ //接受server端回传的信息 InputStream inputStream=socket.getInputStream(); BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream)); String info; while ((info=bufferedReader.readLine())!=null) { System.out.println("我是client。server端返回：："+info); } //关闭资源 bufferedReader.close(); inputStream.close(); printWriter.close(); outputStream.close(); socket.close(); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }