• pom.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
    
      <groupId>org.example</groupId>
      <artifactId>untitled1</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>war</packaging>
    
      <name>untitled1 Maven Webapp</name>
      <!-- FIXME change it to the project's website -->
      <url>http://www.example.com</url>
    
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
      </properties>
      <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
      </parent>
      <dependencies>
        <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <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>
        <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.11</version>
          <scope>test</scope>
        </dependency>
      </dependencies>
    
      <build>
        <finalName>untitled1</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
          <plugins>
            <plugin>
              <artifactId>maven-clean-plugin</artifactId>
              <version>3.1.0</version>
            </plugin>
            <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
            <plugin>
              <artifactId>maven-resources-plugin</artifactId>
              <version>3.0.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-compiler-plugin</artifactId>
              <version>3.8.0</version>
            </plugin>
            <plugin>
              <artifactId>maven-surefire-plugin</artifactId>
              <version>2.22.1</version>
            </plugin>
            <plugin>
              <artifactId>maven-war-plugin</artifactId>
              <version>3.2.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-install-plugin</artifactId>
              <version>2.5.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-deploy-plugin</artifactId>
              <version>2.8.2</version>
            </plugin>
          </plugins>
        </pluginManagement>
      </build>
    </project>
  • 创建配置⽂件 application.yml

    server:
      port: 8181
    spring:
      mvc:
        view:
          prefix: /
          suffix: .jsp
  • 创建Handler

    package com.yin.controller;
    
    import com.yin.entity.Student;
    import com.yin.repository.StudentRepositroy;
    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 StudentRepositroy studentRepositroy;
        @GetMapping("/index")
        public ModelAndView index(){
            ModelAndView modelAndView =new ModelAndView();
            modelAndView.setViewName("index");
            modelAndView.addObject("list",studentRepositroy.findAll());
            return  modelAndView;
    
        }
        @GetMapping("/deleteById/{id}")
        public  String deleteById(@PathVariable("id") long id){
            studentRepositroy.deleteById(id);
            return  "redirect:/hello/index";
    
        }
        @PostMapping("/save")
        public  String  save(Student student){
            studentRepositroy.saveOrUpdate(student);
            return  "redirect:/hello/index";
        }
        @PostMapping("/update")
        public  String update(Student student){
            studentRepositroy.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",studentRepositroy.findById(id));
            return  modelAndView;
    
    
        }
    
    }
  • JSP

    <%--
      Created by IntelliJ IDEA.
      User: Destiny
      Date: 2020/6/9
      Time: 17:02
      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>
            <td>学生编号</td>
            <td>学生姓名</td>
            <td>学生年龄</td>
            <td>操作</td>
    
        </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/${student.id}">xiugai</a>
                    <a href ="/hello/deleteById/${student.id}">shachu</a>
                </td>
            </tr>
        </c:forEach>
    </table>
    <a href="/save.jsp">添加学生</a>
    </body>
    </html>
<%--
  Created by IntelliJ IDEA.
  User: Destiny
  Date: 2020/6/9
  Time: 17:29
  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" value="提交"/>
</form>
</body>
</html>
<%--
  Created by IntelliJ IDEA.
  User: Destiny
  Date: 2020/6/9
  Time: 17:29
  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" value="提交"/>
</form>
</body>
</html>
最后修改:2021 年 05 月 10 日 09 : 06 PM
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