【使用篇】SpringBoot整合jsp（六）

1. pom.xml中添加jstl和jasper

springboot不推荐使用jsp，所以在spring-boot-starter-web启动器中并没有包括这两个，所以我们需要单独引入：

<!-- jstl -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
</dependency>
<!-- jasper:jsp引擎 -->
<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
    <scope>provided</scope>
</dependency>

2. 在src/main/resources目录下创建application.properties，添加jsp的视图映射

#jsp映射配置
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

3. 编写controller

public class User {
    private Integer userId;
    private String userName;
    private Integer age;
    
    public User() {
    }
    public User(Integer userId, String userName, Integer age) {
        this.userId = userId;
        this.userName = userName;
        this.age = age;
    }
    public Integer getUserId() {
        return userId;
    }
    public void setUserId(Integer userId) {
        this.userId = userId;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
}

@RestController
public class UserController {

    @RequestMapping("/findUserList")
    public Object findUserList(Model model){
        List<User> list = new ArrayList<User>();
        list.add(new User(1, "张三", 20));
        list.add(new User(2, "李四", 27));
        list.add(new User(3, "王五", 30));
        model.addAttribute("list",list);
        //因为使用@RestController注解，所以要返回视图，必须使用ModelAndView
        ModelAndView view = new ModelAndView();
        view.addObject(model);
        view.setViewName("userList");//视图名称
        return view;
    }
}

4. 在src/main下创建webapp

前面在application.properties中，已添加了jsp的视图映射，所以在webapp目录下创建WEB-INF/jsp，并创建userList.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!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=utf-8">
<title>用户列表</title>
</head>
<body>
<table>
    <thead>
        <tr>
            <th>Id</th>
            <th>Name</th>
            <th>Age</th>
        </tr>
    </thead>
    <tbody>
        <c:forEach items="${list}" var="user">
            <tr>
                <td>${user.userId }</td>
                <td>${user.userName }</td>
                <td>${user.age }</td>
            </tr>
        </c:forEach>
    </tbody>
</table>
</body>
</html>

5. 编写启动类，执行main方法，访问浏览器：http://localhost:8080/findUserList

【使用篇】SpringBoot整合jsp（六）

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