Socket程序两台电脑为什么连接失败?(在同一台电脑上就成功)
这是我写的Socket程序,在一台电脑上测试就连接成功,用两台电脑分别服务器客户端就失败了。
我确定双方的防火墙什么都关了,也用管理员权限运行。
求大神看看问题出在哪里?
服务器:
package server;
import java.net.*;
import java.io.*;
public class Server {
private ServerSocket server;
private Socket client;
public Server() {
boolean flag = true;
try {
server = new ServerSocket(8888); //端口
System.out.println("服务器正在等到客户端连接......");
while (flag) {
client = server.accept(); //阻塞
new ServerThread(client).start();
}
server.close();
} catch (Exception e) {
}
}
public static void main(String[] args) {
new Server();
}
private class ServerThread extends Thread {
private Socket clientThread;
private PrintStream out;
private BufferedReader in;
private boolean flag = true;
public ServerThread(Socket client) {
this.clientThread = client;
System.out.println("主机与客户端成功建立连接,开始通讯!!");
}
public void run() {
try {
/*
* 超时判断:设置超时时间300秒,中断连接或者300秒内客户端无回应信息则认为中断
* 缺点便是必须把超时时间设置很长,否则客户端待机也认为超时处理,无法判断是否端口
*/
clientThread.setSoTimeout(300000);
out = new PrintStream(client.getOutputStream());
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
while (flag) {
String str = in.readLine(); //阻塞
System.out.println("客户端:" + str);
out.println("主机成功接收到您的信息!!");
}
client.close();
} catch (Exception e) {
//如果异常是连接异常,则输出连接断开
if (e.getMessage() == "Connection reset") {
System.out.println("客户端已断开连接!!");
}
}
}
}
}
package client;socket java 通讯 服务器 客户端
import java.net.*;
import java.io.*;
public class Client {
private Socket client;
public Client() {
try {
System.out.println("正在连接服务器......");
client = new Socket("192.168.218.168", 8888); //阻塞
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
PrintStream out = new PrintStream(client.getOutputStream());;
boolean flag = true;
System.out.println("成功连接到主机,开始通讯!!");
while (flag) {
System.out.printf("请输入信息:");
out.println(input.readLine()); //阻塞
//判断是否与主机断开
if (isConnected()) {
System.out.println("发生成功!!");
System.out.println("主机:" + in.readLine());
} else {
System.out.println("发生失败!!");
System.out.println("与服务器断开连接!!");
client.close();
break;
}
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
//判断服务器是否断开的方法,
//通过OutputStream发送一段测试数据,如果发送失败就表示远端已经断开连接
//但会与正常的传送干扰,所以用sendUrgenData
public boolean isConnected() {
try {
client.sendUrgentData(0xFF);
return true;
} catch (Exception e) {
return false;
}
}
public static void main(String[] args) {
new Client();
}
}