在Debian上使用MVC設計模式開發JSP應用程序,你需要遵循以下步驟:
sudo apt-get update
sudo apt-get install openjdk-11-jdk
sudo apt-get install tomcat9
myapp/
├── src/
│ ├── main/
│ │ ├── java/
│ │ │ └── com/
│ │ │ └── myapp/
│ │ │ ├── controller/
│ │ │ ├── model/
│ │ │ └── view/
│ │ ├── resources/
│ │ └── webapp/
│ │ ├── WEB-INF/
│ │ │ └── web.xml
│ │ └── index.jsp
src/main/java/com/myapp/model
目錄下,創建你的數據模型類。例如,創建一個名為User.java
的文件:package com.myapp.model;
public class User {
private String name;
private String email;
// 構造函數、getter和setter方法
}
src/main/java/com/myapp/controller
目錄下,創建一個名為UserController.java
的文件:package com.myapp.controller;
import com.myapp.model.User;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/user")
public class UserController extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
User user = new User("John Doe", "john.doe@example.com");
req.setAttribute("user", user);
req.getRequestDispatcher("/WEB-INF/views/user.jsp").forward(req, resp);
}
}
src/main/webapp/WEB-INF/views
目錄下,創建一個名為user.jsp
的文件:<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>User Information</title>
</head>
<body>
<h1>User Information</h1>
<p>Name: ${user.name}</p>
<p>Email: ${user.email}</p>
</body>
</html>
src/main/webapp/WEB-INF
目錄下,編輯web.xml
文件,添加以下內容:<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>UserController</servlet-name>
<servlet-class>com.myapp.controller.UserController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UserController</servlet-name>
<url-pattern>/user</url-pattern>
</servlet-mapping>
</web-app>
myapp
目錄復制到/var/lib/tomcat9/webapps
目錄下。然后重啟Tomcat:sudo systemctl restart tomcat9
現在,你可以在瀏覽器中訪問http://your_debian_ip:8080/myapp/user
,看到你的MVC應用程序運行正常。