import java.io.*;
import java.net.Socket;
import java.util.Scanner;
public class Client {
public static void main(String[] args) throws IOException {
Socket socket = new Socket("127.0.0.1", 10001);
System.out.println("服务器已经连接成功");
while (true) {
System.out.println("==============欢迎来到黑马聊天室================");
System.out.println("1登录");
System.out.println("2注册");
System.out.println("请输入您的选择：");
Scanner sc = new Scanner(System.in);
String choose = sc.nextLine();
switch (choose) {
case "1" -> login(socket);
case "2" -> System.out.println("用户选择了注册");
default -> System.out.println("没有这个选项");
}
}
}
public static void login(Socket socket) throws IOException {
//获取输出流
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
//键盘录入
Scanner sc = new Scanner(System.in);
System.out.println("请输入用户名");
String username = sc.nextLine();
System.out.println("请输入密码");
String password = sc.nextLine();
//拼接
StringBuilder sb = new StringBuilder();
//username=zhangsan&password=123
sb.append("username=").append(username).append("&password=").append(password);
//第一次写的是执行登录操作
bw.write("login");
bw.newLine();
bw.flush();
//第二次写的是用户名和密码的信息
//往服务器写出用户名和密码
bw.write(sb.toString());
bw.newLine();
bw.flush();
//接收数据
//获取输入流
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String message = br.readLine();
System.out.println(message);
//1：登录成功 2 密码有误 3 用户名不存在
if ("1".equals(message)) {
System.out.println("登录成功，开始聊天");
//开一条单独的线程，专门用来接收服务端发送过来的聊天记录
new Thread(new ClientMyRunnable(socket)).start();
//开始聊天
talk2All(bw);
} else if ("2".equals(message)) {
System.out.println("密码输入错误");
} else if ("3".equals(message)) {
System.out.println("用户名不存在");
}
}
//往服务器写出消息
private static void talk2All(BufferedWriter bw) throws IOException {
Scanner sc = new Scanner(System.in);
while (true) {
System.out.println("请输入您要说的话");
String str = sc.nextLine();
//把聊天内容写给服务器
bw.write(str);
bw.newLine();
bw.flush();
}
}
}
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
class ClientMyRunnable implements Runnable{
Socket socket;
public ClientMyRunnable(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
//循环，重复的接受
while (true) {
try {
//接收服务器发送过来的聊天记录
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String msg = br.readLine();
System.out.println(msg);
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
import java.io.*;
import java.net.Socket;
import java.util.Properties;
class MyRunnable implements Runnable {
Socket socket;
Properties prop;
public MyRunnable(Socket socket, Properties prop) {
this.prop = prop;
this.socket = socket;
}
@Override
public void run() {
try {
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while (true) {
String choose = br.readLine();
switch (choose) {
case "login" -> login(br);
case "register" -> System.out.println("用户选择了注册操作");
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
//获取用户登录时，传递过来的信息。
//并进行判断
public void login(BufferedReader br) throws IOException {
System.out.println("用户选择了登录操作");
String userinfo = br.readLine();
//username=zhangsan&password=123
String[] userInfoArr = userinfo.split("&");
String usernameInput = userInfoArr[0].split("=")[1];
String passwordInput = userInfoArr[1].split("=")[1];
System.out.println("用户输入的用户名为:" + usernameInput);
System.out.println("用户输入的密码为:" + passwordInput);
if (prop.containsKey(usernameInput)) {
//如果用户名存在，继续判断密码
String rightPassword = prop.get(usernameInput) + "";
if (rightPassword.equals(passwordInput)) {
//提示用户登录成功，可以开始聊天
writeMessage2Client("1");
//登录成功的时候，就需要把客户端的连接对象Socket保存起来
Server.list.add(socket);
//写一个while(){}表示正在聊天
//接收客户端发送过来的消息，并打印在控制台
talk2All(br, usernameInput);
} else {
//密码输入有误
writeMessage2Client("2");
}
} else {
//如果用户名不存在，直接回写
writeMessage2Client("3");
}
}
private void talk2All(BufferedReader br, String username) throws IOException {
while (true) {
String message = br.readLine();
System.out.println(username + "发送过来消息：" + message);
//群发
for (Socket s : Server.list) {
//s依次表示每一个客户端的连接对象
writeMessage2Client(s, username + "发送过来消息：" + message);
}
}
}
public void writeMessage2Client(String message) throws IOException {
//获取输出流
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
bw.write(message);
bw.newLine();
bw.flush();
}
public void writeMessage2Client(Socket s, String message) throws IOException {
//获取输出流
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
bw.write(message);
bw.newLine();
bw.flush();
}
}
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Properties;
public class Server {
static ArrayList list = new ArrayList<>();
public static void main(String[] args) throws IOException {
ServerSocket ss = new ServerSocket(10001);
//1.把本地文件中正确的用户名和密码获取到
Properties prop = new Properties();
FileInputStream fis = new FileInputStream("sockethomework\\servicedir\\userinfo.txt");
prop.load(fis);
fis.close();
//2.只要来了一个客户端，就开一条线程处理
while (true) {
Socket socket = ss.accept();
System.out.println("有客户端来链接");
new Thread(new MyRunnable(socket, prop)).start();
}
}
}
单词
