我上网复制了一点服务器代码：
package ZTFZS;
import java.io.*;
import java.net.*;
/**
* socket 服务端
* @author xiaoming
* @version 1.0
* @date 2022-01-28
*/
public class A {
public static String socketserver_ip = "127.0.0.1";
public static int socketserver_port = 1024;
public static void main(String[] args) throws IOException {
startSocketForMoreThread();
}
/**
* 多线程通信socket服务端
*/
public static void startSocketForMoreThread() throws IOException {
try{
ServerSocket ss = new ServerSocket(socketserver_port);
System.out.println("CommunicationServer启动服务器....端口为:"+socketserver_port+" wait connect...");
while(true){
Socket s = ss.accept();
System.out.println("12");
String r = new String("");
System.out.println();
//起一个线程处理
new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("ok");
//读取和写入消息
readAndWriteMsg(s.getInputStream(),s.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}catch (EOFException c){
//TODO
}
}
/**
* 读取和写入消息
* @param inp
* @param outp
* @throws IOException
*/
public static void readAndWriteMsg(InputStream inp,OutputStream outp) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(inp));
//持续读取客户端发送来的消息
while(true) {
System.out.println("CAN");
Thread t = Thread.currentThread();
String tname = t.getName();
String mess = br.readLine();
System.out.println("线程name="+tname+"【收到客户端信息】信息为：" + mess);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(outp));
bw.write("【服务端】已收到客户端发送消息，消息为："+mess+"\n");
bw.flush();
}
}
}
//But，它运行时突然报错：
//Exception in thread "main" java.net.BindException: Address already in use: bind
//at java.base/sun.nio.ch.Net.bind0(Native Method)
//at java.base/sun.nio.ch.Net.bind(Net.java:555)
//at java.base/sun.nio.ch.Net.bind(Net.java:544)
//at java.base/sun.nio.ch.NioSocketImpl.bind(NioSocketImpl.java:643)
//at java.base/java.net.ServerSocket.bind(ServerSocket.java:388)
//at java.base/java.net.ServerSocket.<init>(ServerSocket.java:274)
//at java.base/java.net.ServerSocket.<init>(ServerSocket.java:167)
//at ZTFZS.A.startSocketForMoreThread(A.java:26)
//at ZTFZS.A.main(A.java:17)
//不知道咋办
//请高人指教
//very感谢
