JAVA soket通信

最新推荐文章于 2022-04-17 21:35:55 发布

jingyesihw

最新推荐文章于 2022-04-17 21:35:55 发布

阅读量309

点赞数

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/jingyesihw/article/details/77148190

本文提供了一组Java网络编程的基本示例，包括服务端和客户端代码。服务端监听10086端口并接收客户端消息，客户端则连接到该端口发送消息，并接收来自服务端的响应。

服务端代码

import java.net.*;
import java.io.*;
import java.lang.*;
import java.util.*;
import java.text.*;

public class server
{
private static String getInputMsg( Socket s )
{
String inStr = "";
if(s == null)
return inStr;

try{
InputStream in = s.getInputStream();
byte[] inStrBuff = new byte[1024];
in.read(inStrBuff);
inStr = new String(inStrBuff);
}
catch(IOException e)
{
e.printStackTrace();
}
return inStr.trim();
}

private static void sendOutputMsg(Socket s, String msg)
{
if( s == null || msg == "" )
return;

try{
OutputStream out = s.getOutputStream();
out.write( msg.getBytes() );
out.flush();
}
catch(IOException e)
{
e.printStackTrace();
}
}

private static String getCurrentTime()
{
//get now time string
Date dNow = new Date();
SimpleDateFormat ft = new SimpleDateFormat ("yyyyMMddhhmmss");
String nowTime = new String(ft.format(dNow));
return nowTime;
}

public static void main(String [] args)
{
try{
//listen at port 10086
ServerSocket serverSocket = new ServerSocket(10086);
System.out.println( "start listen at port 10086" );

while(true)
{
//accept
Socket server = serverSocket.accept();

//print client message
String clientMsg = getInputMsg(server);
System.out.println( "data from client => " + clientMsg );

//create response data send to client
System.out.println("client data length = " + clientMsg.length());
String msg = "$ST$" + getCurrentTime() + "0000" + "RECE" + "0000" + "$ED$";
sendOutputMsg(server, msg);
}

}catch(IOException e)
{
e.printStackTrace();
}
}
}

客户端代码

import java.net.*;
import java.io.*;
import java.lang.*;
import java.util.*;
import java.text.*;

public class client
{

private static String getInputMsg( Socket s )
{
String inStr = "";
if(s == null)
return inStr;

try{
InputStream in = s.getInputStream();
byte[] inStrBuff = new byte[1024];
in.read(inStrBuff);
inStr = new String(inStrBuff);
}
catch(IOException e)
{
e.printStackTrace();
}
return inStr.trim();
}

private static void sendOutputMsg(Socket s, String msg)
{
if( s == null || msg == "" )
return;

try{
OutputStream out = s.getOutputStream();
out.write( msg.getBytes() );
out.flush();
}
catch(IOException e)
{
e.printStackTrace();
}

}

private static String getCurrentTime()
{
//get now time string
Date dNow = new Date();
SimpleDateFormat ft = new SimpleDateFormat ("yyyyMMddhhmmss");
String nowTime = new String(ft.format(dNow));
return nowTime;
}

public static void main(String [] args)
{
try{
Socket client = new Socket("127.0.0.1",10086);
//send message to server
String msg = "$ST$" + getCurrentTime() + "0000" + "STAT" + "0000" + "$ED$";
sendOutputMsg(client, msg);

//print server message
String serverMsg = getInputMsg(client);
System.out.println("server data length = " + serverMsg.length());
System.out.println( "data from server => " + serverMsg );

}
catch(IOException e)
{
e.printStackTrace();
}
}
}