接：[springboot 搭建简单demo](https://blog.csdn.net/qq_44969643/article/details/106408784)
**先看最终效果图：**
由于是jsp写的，所以效果不是很好（之前做过：vue-cli+Element ui+springboot的图书管理系统，比较美观，下载地址：[github](https://github.com/hnust-xijing/BookManage.git)）
新建项目：
使用maven,选择webapp（jsp需要）
pom.xml
```java
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.7.RELEASE</version>
</parent>
<dependencies>
<dependency>
<!-- web相关的组件-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--整合jsp-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<!--JSTL-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.6</version>
<scope>provided</scope>
</dependency>
</dependencies>
创建配置文件 application.yml
server:
port: 8181
spring:
mvc:
view:
prefix: /
suffix: .jsp
```
**创建配置文件 application.yml**
```java
server:
port: 8181
spring:
mvc:
view:
prefix: /
suffix: .jsp
```
**创建Handler**
```java
package com.shuang.controller;
import com.shuang.entity.Student;
import com.shuang.repository.StudentRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/hello")
public class HelloHandler {
@Autowired
private StudentRepository studentRepository;
@GetMapping("/index")
public ModelAndView index(){
ModelAndView modelAndView=new ModelAndView();
modelAndView.setViewName("index");
modelAndView.addObject("List",studentRepository.findAll());
return modelAndView;
}
@GetMapping("/deleteById/{id}")
public String deleteById(@PathVariable("id") long id){
studentRepository.deleteById(id);
return "redirect:/hello/index";
}
@PostMapping("/save")
public String save(Student student){
studentRepository.saveOrUpdate(student);
return "redirect:/hello/index";
}
@PostMapping("/update")
public String update(Student student){
studentRepository.saveOrUpdate(student);
return "redirect:/hello/index";
}
@GetMapping("/findById/{id}")
public ModelAndView findById(@PathVariable("id") long id){
ModelAndView modelAndView=new ModelAndView();
modelAndView.setViewName("update");
modelAndView.addObject("student",studentRepository.findByid(id));
return modelAndView;
}
}
```
**JSP**
index.jsp
```java
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2020/5/29
Time: 10:16
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>学生信息</h1>
<table>
<tr>
<th>学生编号</th>
<th>学生姓名</th>
<th>学生年龄</th>
<th>操作</th>
</tr>
<c:forEach items="${List}" var="student">
<tr>
<td>${student.id}</td>
<td>${student.name}</td>
<td>${student.age}</td>
<td>
<a href="/hello/findById/${student.id}">修改</a>
<a href="/hello/deleteById/${student.id}">删除</a>
</td>
</tr>
</c:forEach>
</table>
<a href="/save.jsp">添加学生</a>
</body>
</html>
```
save.jsp
```java
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2020/5/29
Time: 12:01
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="/hello/save" method="post">
ID:<input type="text" name="id"/><br/>
name:<input type="text" name="name"/><br/>
age:<input type="text" name="age"/><br/>
<input type="submit" name="提交"/>
</form>
</body>
</html>
```
update.jsp
```java
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2020/5/29
Time: 12:05
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="/hello/update" method="post">
ID:<input type="text" name="id" value="${student.id}" readonly/><br/>
name:<input type="text" name="name" value="${student.name}"/><br/>
age:<input type="text" name="age" value="${student.age}"/><br/>
<input type="submit" name="提交"/>
</form>
</body>
</html>
```
**文件目录**
