Java socket多线程实现一个简单的tomcat

言曌 2017年08月30日19:22:13 6 2844 views

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今天老师让我们十分钟实现一个简单版的 Tomcat，需求很简单，用户访问 localhost:8080，能向后台发起请求。后台通过 socket 监听，并返回一个 html 页面内容给他就行，因为时间有限，只写了一个简单的类。

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
/**
* 服务器端
*
* @author 言曌
* @date 2017-08-30 14:31
*/
public class TomcatServer {
public static void main(String[] args) throws Exception {
ServerSocket server = new ServerSocket(8080);
// (1) 接收新连接线程
while (true) {
try {
// (1) 阻塞方法获取新的连接
Socket socket = server.accept();
// (2) 每一个新的连接都创建一个线程，负责读取数据
new Thread(() -> {
try {
System.out.println("创建了新的线程："+Thread.currentThread().getName());
InputStreamReader r = new InputStreamReader(socket.getInputStream());
BufferedReader br = new BufferedReader(r);
String readLine = br.readLine();
System.out.println("获取到数据：");
System.out.println("====================================================》");
while (readLine != null && !readLine.equals("")) {
System.out.println(readLine);
readLine = br.readLine();
}
String html = "http/1.1 200 ok\n\n" + readFromFile("test.html");
PrintWriter pw = new PrintWriter(socket.getOutputStream());
pw.println(html);
pw.close();
} catch (IOException e) {
}
}).start();
} catch (IOException e) {
}
}
}
public static String readFromFile(String filename) {
StringBuffer sb = new StringBuffer();
try {
BufferedReader br = new BufferedReader(new FileReader("/Users/liuyanzhao/sell/Demo/src/" + filename));
String temp = null;
while ((temp = br.readLine()) != null) {
sb.append(temp + "\r\n");
}
// System.out.println(sb);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
}

src目录放一个 text.html

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
XXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
这是 test.html 内容
</body>
</html>