07_pom.xml下增加对JSP的支持

1.增加servlet依赖

<!-- servlet依赖 -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>
<!-- tomcat的支持 -->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
</dependency>

2.在目录src/main/resources的application.properties文件下，添加以下内容，作为jsp内容的重定位

spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

3.添加HelloController类

package com.example.demo_zhang.web;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;


import java.text.DateFormat;
import java.util.Date;

@Controller
public class HelloController {

    @RequestMapping("/hello")
    public String hello(Model m) {
        m.addAttribute("now", DateFormat.getDateTimeInstance().format(new Date()));
        return "hello";
    }

}

4.在main目录下，新建webapp/WEB-INF/jsp目录，添加以下内容。

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
Hi JSP. 现在时间是  ${now}

5.启动，并查看地址

http://127.0.0.1:8080/hello