socket客户端与服务端的简单Demo

   与外系统开发接口，发现系统采用的是Socket来做通信的，整理个简单的Demo，复习下基础。

   客户端Demo

package com.socket;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class SocketClientDemo {
    public static void main(String[] args) {
        Socket sc = null;
        InputStream ips = null;
        OutputStream ops = null;
        try {
            // 设置发送服务端的ip和端口
            sc = new Socket("127.0.0.1", 8081);
            // 设置超时时间
            sc.setSoTimeout(10000);
            // 发送服务端
            ops = sc.getOutputStream();
            ops.write("Socket客户端发送请求报文内容".getBytes("UTF-8"));
            ops.flush();
            System.out.println("客户端报文发送完毕");
            
            // 接受服务端响应的内容
            ips = sc.getInputStream();
            byte[] rsp = new byte[256];    
            // 将服务端返回的字节流读入字节数组
            ips.read(rsp);
            // 将字节流数组安装UTF-8的格式转换为String类型
            String rspStr = new String(rsp, "UTF-8");
            System.out.println("服务端返回的响应为：" + rspStr);
            
        } catch (Exception e) {
            e.getStackTrace();
        }finally {
            
            // 关闭流
            if(ips != null) {
                try {
                    ips.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(ops != null) {
                try {
                    ops.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }                                
            // 关闭Socket
            if(sc != null) {
                try {
                    sc.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        
    }
}

  服务端Demo

package com.socket;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketServerDemo {
    public static void main(String[] args) {
        ServerSocket ss = null;
        InputStream ips = null;
        OutputStream ops = null;
        try {
            // 服务端监听8081端口
            ss = new ServerSocket(8081);
            System.out.println("服务端已启动");
            // 阻塞等待客户端请求
            Socket accept = ss.accept();
            // 获取客户端的输入流
            ips = accept.getInputStream();
            byte[] reqByte = new byte[256];
            // 将输入流的内容读入字节数组
            ips.read(reqByte);
            String reqStr = new String(reqByte, "UTF-8");
            System.out.println("服务端接收到客户端请求报文：" + reqStr);
            
            // 服务端返回信息给客户端
            ops = accept.getOutputStream();
            ops.write("服务端已收到客户端的请求".getBytes("UTF-8"));
            ops.flush();
            System.out.println("服务端响应完毕");
            
        } catch (Exception e) {
            e.getStackTrace();
        }finally {
            // 关闭流
            if(ips != null) {
                try {
                    ips.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(ops != null) {
                try {
                    ops.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }                                
            // 关闭Socket
            if(ss != null) {
                try {
                    ss.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}