Java 聊天工具：打造即时消息应用120

Java 语言以其强大的网络功能和可移植性而闻名，使其成为开发聊天工具的理想选择。本文将指导你一步一步创建 Java 聊天工具，实现实时消息传输。

先决条件

在开始之前，确保你的计算机已安装以下软件：
Java 开发工具包 (JDK) 11 或更高版本
集成开发环境 (IDE)，例如 IntelliJ IDEA 或 Eclipse
文本编辑器，例如 Notepad++ 或 Sublime Text

创建一个新项目

使用你选择的 IDE 创建一个新的 Java 项目，并将其命名为“ChatTool”。

创建服务器类

创建名为“”的新类，此类将处理服务器端逻辑：```java
import .*;
import .*;
public class Server {
private int port;
private ServerSocket serverSocket;
public Server(int port) {
= port;
}
public void start() {
try {
serverSocket = new ServerSocket(port);
("Server started on port " + port);
while (true) {
Socket clientSocket = ();
("Client connected from " + ().getHostAddress());
handleClient(clientSocket);
}
} catch (IOException e) {
();
}
}
private void handleClient(Socket clientSocket) {
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(()));
PrintWriter writer = new PrintWriter((), true);
String message;
while ((message = ()) != null) {
("Received message from client: " + message);
("Server received your message.");
}
} catch (IOException e) {
();
} finally {
try {
();
} catch (IOException e) {
();
}
}
}
}
```

创建客户端类

创建名为“”的新类，此类将处理客户端端逻辑：```java
import .*;
import .*;
public class Client{
private String host;
private int port;
public Client(String host, int port) {
= host;
= port;
}
public void start() {
try {
Socket clientSocket = new Socket(host, port);
("Connected to server on " + host + ":" + port);
BufferedReader reader = new BufferedReader(new InputStreamReader(()));
PrintWriter writer = new PrintWriter((), true);
BufferedReader input = new BufferedReader(new InputStreamReader());
String message;
while ((message = ()) != null) {
(message);
(());
}
} catch (IOException e) {
();
}
}
}
```