我有一个Java服务器和客户端，都在localhost或我的机器IP上工作，但是当我从本地网络中的另一台计算机告诉IP时，它告诉“发生异常：连接被拒绝：连接”！这是我的代码：
ChatClient.java
package programmingchat;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
public class ChatClient {
private Socket socket;
private Scanner console;
private DataOutputStream output;
private BufferedReader reader;
public ChatClient(String serverName, int serverPort) {
try {
System.out.println("LiveChat Client 1.1 start.");
System.out.println("Trying to connect to " + serverName + " on port " + serverPort + "...");
socket = new Socket(serverName, serverPort);
System.out.println("Success!");
console = new Scanner(System.in);
output = new DataOutputStream(socket.getOutputStream());
reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
Thread t1 = new Thread(){
@Override
public void run() {
String line = "";
while(!line.equals(".bye")) {
try {
System.out.print("me: ");
line = console.nextLine();
output.writeUTF(line);
output.flush();
} catch(IOException e) {
e.printStackTrace();
}
}
}
};
Thread t2 = new Thread(){
@Override
public void run() {
String line = "";
try {
while(!(line = reader.readLine()).equals(".bye")) {
System.out.print("\nhe: " + line + "\nme: ");
}
} catch (IOException e) {
e.printStackTrace();
}
}
};
t1.start();
t2.start();
} catch(UnknownHostException e) {
System.err.println("Unknown host: " + e.getMessage());
} catch(IOException e) {
System.err.println("Exception ocurred: " + e.getMessage());
} catch(Exception e) {
e.printStackTrace();
System.exit(-1);
}
}
@SuppressWarnings({ "unused", "resource" })
public static void main(String[] args) throws IOException {
File hostsFile = new File("hosts.dat");
if(!hostsFile.exists()) {
hostsFile.createNewFile();
FileController.writeFile(hostsFile.getPath(), "localhost\n");
}
String hosts = FileController.loadFile("hosts.dat");
String[] h = hosts.split("\n");
System.out.println("Select host by it number, or insert a new one.");
System.out.println("Currently avaliable hosts: ");
for(int i = 0; i < h.length; i++) {
System.out.println(i + ": " + h[i]);
}
System.out.print("Please provide the IP Address of the server: ");
Scanner s = new Scanner(System.in);
String hostName = s.nextLine();
if(isInteger(hostName)) {
int i = Integer.parseInt(hostName);
hostName = h[i];
} else {
FileController.writeFile(hostsFile.getPath(), hostName + "\n");
}
ChatClient client = new ChatClient("localhost", 9081);
}
private static boolean isInteger(String str) {
boolean is = false;
try {
Integer.parseInt(str);
is = true;
} catch(Exception e) {
is = false;
}
return is;
}
}
ChatServer.java
package programmingchat;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
public class ChatServer {
private Socket[] sockets;
private ServerSocket server;
private DataInputStream[] ins;
private PrintStream[] outs;
private String ln1;
private String ln2;
public ChatServer(int port) {
try {
System.out.println("LiveChat Server 0.9 start.");
System.out.println("Trying to open port " + port + "...");
server = new ServerSocket(port);
System.out.println("Server " + server.getInetAddress().getHostName() + " successfully started!");
System.out.println("Instantiating input and output streams...");
ins = new DataInputStream[2];
outs = new PrintStream[2];
System.out.println("Success!");
System.out.println("Instantiating sockets...");
sockets = new Socket[2];
System.out.println("Success!");
System.out.println("Waiting socket 1 to connect...");
sockets[0] = server.accept();
System.out.println("Success!");
System.out.println("Waiting socket 2 to connect...");
sockets[1] = server.accept();
System.out.println("Success!");
System.out.println("Opening input and output streams...");
open();
System.out.println("Success!");
System.out.println("Initializing input strings...");
ln1 = "";
ln2 = "";
System.out.println("Success!");
Thread r1 = new Thread() {
@Override
public void run() {
try {
while(!ln1.equals(".bye")) {
ln1 = ins[0].readUTF();
System.out.println("1: " +ln1);
outs[1].println(ln1);
}
System.out.println("Socket 1 disconnect!");
sockets[0].close();
} catch(IOException e) {
e.printStackTrace();
}
}
};
Thread r2 = new Thread() {
@Override
public void run() {
try {
while(!ln2.equals(".bye")) {
ln2 = ins[1].readUTF();
System.out.println("2: " + ln2);
outs[0].println(ln2);
}
System.out.println("Socket 2 disconnect!");
sockets[1].close();
} catch(IOException e) {
e.printStackTrace();
}
}
};
r1.start();
r2.start();
} catch(Exception e) {
e.printStackTrace();
}
}
public void open() throws IOException {
ins[0] = new DataInputStream(new BufferedInputStream(sockets[0].getInputStream()));
ins[1] = new DataInputStream(new BufferedInputStream(sockets[1].getInputStream()));
outs[0] = new PrintStream(sockets[0].getOutputStream());
outs[1] = new PrintStream(sockets[1].getOutputStream());
}
@SuppressWarnings("unused")
public static void main(String[] args) {
ChatServer chat = new ChatServer(9081);
}
}
请有人可以帮助我吗？
答案 0 :(得分：0)
使用服务器的本地IP地址而不是“localhost”
ChatClient client = new ChatClient("localhost", 9081);
您的服务器位于不同的计算机上，如果服务器和客户端都在一台计算机上，则它可以正常工作。
（How do I find my local (internal) IP address?）
修改
通过在路由器上转发端口号，未配置路由器接受客户端和服务器之间的此连接肯定会导致此错误，因此您应该这样做。
（How to Set Up Port Forwarding on a Router，根据路由器类型的不同而不同）