[英]Is there a possiblity to write/read from a socket on same port from different class
我有 Spring 引导应用程序用于机器(tcp 客户端)和 TCP 服务器(localhost)之间的通信。 我能够与一台机器/客户端通信,但我无法与两台或更多台机器通信。 因此我启动了我的 Spring 引导应用程序:
package com.example.workflow;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import java.io.IOException;
@SpringBootApplication
public class Application {
public static void main(String[] args) throws IOException {
Runnable serverZyklisch = new ServerZyklisch();
Runnable serverAzyklisch = new ServerAzyklisch();
for (int i = 0; i < 4; i++) {
new Thread(serverZyklisch).start();
new Thread(serverAzyklisch).start();
}
SpringApplication.run(Application.class);
}
}
在那里我启动了不同的线程,以便客户端(例如 10.50.12.174 = Press,10.50.12.204 = Drill)可以通过套接字连接连接到 TCP 服务器。
我的 ServerAzyklisch class 是这样的:
package com.example.workflow;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class ServerAzyklisch implements Runnable, JavaDelegate {
int count = 0;
private final ServerSocket ssocket;
static String param = StartTCPServersDelegate.parameter;
HexToByteConverter hexToByteConverter = new HexToByteConverter();
// 2 TCP Server starten Port 2000, Port 2001
public ServerAzyklisch(String Pparam) throws IOException {
ssocket = new ServerSocket(2000);
param = Pparam;
}
public ServerAzyklisch() throws IOException {
ssocket = new ServerSocket(2000);
}
public void run() {
byte[] buf = new byte[1];
System.out.println(param+"Paraaam");
InputStream in;
OutputStream out = null;
Socket socket = null;
//Thread immer aktiv
int n = 0;
while(true){
try {
// Wartet auf Socket Verbindung
System.out.println("Server is listening on port "+ ssocket.getLocalPort());
socket = ssocket.accept();
count++;
System.out.println("Countet clients: "+count);
socket.setSoLinger(true, 1000);
System.out.println("Sockeport: "+socket.getLocalPort());
System.out.println("Connection from " + socket.getInetAddress().toString());
//Inputstream
in = socket.getInputStream();
//Outputstream
out = socket.getOutputStream();
//Datenpuffer deklarieren (anlegen)
byte []data = new byte[132];
byte[]Pressen1hexdump110 = hexToByteConverter.hexStringToByteArray("33333333003d0064000600000004004001c9c78900010000006e0000000000000000000000000001000000000014000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"+param);
byte[]Pressen2hexdump = hexToByteConverter.hexStringToByteArray("3333333300400065000a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
byte[]Pressen3hexdump = hexToByteConverter.hexStringToByteArray("3333333300400065001400000000004001c9c6e900010000006e000000000000000000000000000100000000001e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
in.read(buf);
while (buf[0] != -1) {
out.write(Pressen1hexdump110);
out.write(Pressen2hexdump);
out.write(Pressen3hexdump);
}
} catch (IOException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
}
}
@Override
public void execute(DelegateExecution delegateExecution) throws IOException {
}
}
现在我想将其他类中的“while 循环”(带有 out.write)外包,以使用与 ServerAzyklisch 运行方法中的 Socket 的连接。
因此,我写了例如 Class Presse.java
package com.example.workflow;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.JavaDelegate;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Presse implements JavaDelegate {
ServerSocket ssocket;
private HexToByteConverter hexToByteConverter = new HexToByteConverter();
Socket socket;
InputStream in;
OutputStream out;
byte[]Pressen1hexdump110 = hexToByteConverter.hexStringToByteArray("33333333003d0064000600000004004001c9c78900010000006e00000000000000000000000000010000000000140000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005");
byte[]Pressen2hexdump = hexToByteConverter.hexStringToByteArray("3333333300400065000a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
byte[]Pressen3hexdump = hexToByteConverter.hexStringToByteArray("3333333300400065001400000000004001c9c6e900010000006e000000000000000000000000000100000000001e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
public Presse() throws IOException {
ssocket = new ServerSocket(2000);
socket = ssocket.accept();
//Inputstream
in = socket.getInputStream();
//Outputstream
out = socket.getOutputStream();
}
public void sendMessage(InputStream in, OutputStream out, byte[]message) throws IOException {
out.write(Pressen1hexdump110);
out.write(Pressen2hexdump);
out.write(Pressen3hexdump);
socket.close();
}
@Override
public void execute(DelegateExecution delegateExecution) throws Exception {
PostRequestDelegate postRequestDelegate = new PostRequestDelegate();
postRequestDelegate.post();
}
}
我想从这个 class 发送我的 3 条消息,就像在 ServerAzyklisch class 中一样。 但它会抛出错误,因为:
Caused by: java.net.BindException: Address already in use: NET_Bind
我知道这是因为我第二次做 Socket.accept,但我不明白我如何才能实现这一点。 我必须关闭套接字连接吗? 如果是,在哪里以及使用哪个 Java 命令?
如果您想在您的程序中拥有多个“Presse”实例,那么您至少需要从中删除ServerSocket
。 相反,您应该在其他地方accept
来自客户端的连接,并将客户端套接字传递给Presse
构造函数:
public Presse(Socket clientSocket) throws IOException {
this.socket = clientSocket;
//Inputstream
in = socket.getInputStream();
//Outputstream
out = socket.getOutputStream();
}
通常你只想创建一个ServerSocket
,然后在一个循环中调用accept
。 要一次允许多个客户端连接,请在单独的线程中与客户端通信。 这样服务器可以 go 并接受新的连接。 这是一个如何使用线程池的框架示例:
int maxClients = 10;
ExecutorService threadPool = Executors.newFixedThreadPool(maxClients);
ServerSocket serverSocket = new ServerSocket(2000);
while (true) {
Socket clientSocket = serverSocket.accept();
threadPool.submit(() -> {
// Communicate with clientSocket, for example:
Presse p = new Presse(clientSocket);
// You'll want to have this code in a separate method
});
}
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