在Spring第一個Demo程序的基礎上
第一步：添加web.xml文件， web.xml文件放在/WEB-INF下，內容如下
<?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_3_1.xsd"
version="3.1">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 封裝了一個監聽器,幫助加載spring的配置文件 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
該xml在tomcat運行時，會被加載，並且會把applicationContext.xml進行加載
第二步：添加StudentServlet類
package com.fd.spring.servlet;
import java.io.IOException;
import javax.servlet.ServletConfig;
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 org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
@WebServlet("/student")
public class StudentServlet extends HttpServlet{
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
}
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("service...");
req.setAttribute("list", "123");
req.getRequestDispatcher("index.jsp").forward(req, resp);
}
}
這時運行run on server的話，在頁面上訪問 http://localhost:8080/SpringDemo/student，在console上可以看到如下信息
第三步：繼續添加index.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>this is spring on Tomcat</h1>
</body>
</html>
再次運行出現如下頁面
