说是学生管理系统,实际上就是对学生表的CURD
环境说明
- jdk:1.8
- tomcat:8.5
- spring系列:4.3.2
- IDE:Eclipse
之前使用 jdk 11 出现了很多配置问题,换了 jdk 1.8 就正常了,百度了一下原因是 jdk 和 spring 版本不兼容。
项目结构

数据库结构
数据库名:stubase
表名:student
表结构:

id 字段为自增
具体代码
Pojo
// Student.java
public class Student {
private String name;
private int age;
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
}
}
Dao层
// StudentDao.java
// 接口
import java.util.List;
import org.springframework.stereotype.Repository;
import com.ye.pojo.Student;
@Repository
public interface StudentDao {
// 添加学生信息
public void add(String name, int age);
// 显示所有学生信息
public List<Student> show();
// 删除学生信息
public void delete(int id);
// 根据id查询学生信息
public List<Student> select(int id);
// 更新学生信息
public void update(int id, String name, int age);
}
// studentMapping.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ye.dao.StudentDao">
<select id="show" resultType="student">
select id, name, age from student
</select>
<select id="select" parameterType="int" resultType="student">
select id, name, age from student where id = #{id}
</select>
<insert id="add">
insert into student(name, age) values(#{0}, #{1})
</insert>
<delete id="delete" parameterType="int">
DELETE FROM student WHERE id = #{id}
</delete>
<update id="update">
update student set name=#{1}, age=#{2} where id=#{0}
</update>
</mapper>
Service层
// StudentService.java
//接口
import java.util.List;
import com.ye.pojo.Student;
public interface StudentService {
public void add(String name, int age);
public List<Student> show();
public void delete(int id);
public List<Student> select(int id);
public void update(int id, String name, int age);
}
// StudentServiceImpl.java
// StudentService接口的实现类
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ye.dao.StudentDao;
import com.ye.pojo.Student;
import com.ye.service.StudentService;
@Service
public class StudentServiceImpl implements StudentService{
@Autowired
private StudentDao studentDao;
public void setStudentDao(StudentDao studentDao) {
this.studentDao = studentDao;
}
public List<Student> show(){
return studentDao.show();
}
public void add(String name, int age) {
studentDao.add(name, age);
}
public void delete(int id) {
studentDao.delete(id);
}
public List<Student> select(int id) {
return studentDao.select(id);
}
public void update(int id, String name, int age) {
studentDao.update(id, name, age);
}
}
Controller
// StudentController.java
// java类
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.ye.pojo.Student;
import com.ye.service.StudentService;
@Controller
@RequestMapping("/stu")
public class StudentController {
@Autowired
private StudentService studentService;
public void setStudentService(StudentService studentService) {
this.studentService = studentService;
}
// 查询所有学生信息用list接收,将list数据传到index.jsp中。
// index.jsp使用${list}获取数据
@RequestMapping("/show")
public ModelAndView Show() {
ModelAndView mv = new ModelAndView();
List<Student> list = new ArrayList<Student>();
if( null != studentService.show()){
list = studentService.show();
mv.addObject("list", list);
}
mv.setViewName("index");
return mv;
}
// 添加学生信息
// add()操作数据库成功之后,重定向到show方法上重新绑定数据
@RequestMapping("/add")
public String Add(String add_name, String add_age) {
studentService.add(add_name, Integer.parseInt(add_age));
return "redirect:./show.do";
}
// 根据学生id查询信息
@RequestMapping("/select")
public ModelAndView Select(int id) {
ModelAndView mv = new ModelAndView();
List<Student> list = new ArrayList<Student>();
list = studentService.select(id);
mv.addObject("list", list);
mv.setViewName("index");
return mv;
}
// 根据id删除学生信息
// delete()操作数据库成功之后,重定向到show方法上重新绑定数据
@RequestMapping("/delete")
public String Delete(int del_id) {
studentService.delete(del_id);
return "redirect:./show.do";
}
// 将要更新的数据传到update页面,单独显示
@RequestMapping("/getupdate/{id}")
public ModelAndView UpdateGetId(@PathVariable int id) {
int modId = id;
ModelAndView mv = new ModelAndView();
List<Student> list = new ArrayList<Student>();
list = studentService.select(id);
mv.addObject("list", list);
mv.addObject("modId", modId);
mv.setViewName("update");
return mv;
}
// 更新数据到数据库
// update()操作数据库成功之后,重定向到show方法上重新绑定数据
@RequestMapping("/updatedata")
public String UpdateData(int mody_id, String mody_name, int mody_age) {
studentService.update(mody_id, mody_name, mody_age);
return "redirect:./show.do";
}
}
配置文件
<!-- mybatis-config.xml -->
<!-- 路径 src/mybatis-config.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<typeAlias type="com.ye.pojo.Student" alias="student" />
</typeAliases>
<mappers>
<mapper resource="com/ye/dao/studentMapper.xml" />
</mappers>
</configuration>
<!-- applicationContext.xml -->
<!-- 路径 WebContent/WEB-INF/applicationContext.xml -->
<?xml version='1.0' encoding='UTF-8' ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:annotation-config />
<context:component-scan base-package="com.ye.*" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/stubase" />
<property name="username" value="root" />
<property name="password" value="root" />
<property name="maxActive" value="255" />
<property name="maxIdle" value="5" />
<property name="maxWait" value="10000" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ye.dao" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
<property name="annotationClass" value="org.springframework.stereotype.Repository" />
</bean>
</beans>
<!-- dispatcher-servlet.xml -->
<!-- 路径 WebContent/WEB-INF/dispatcher-servlet.xml -->
<?xml version='1.0' encoding='UTF-8' ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<mvc:annotation-driven />
<context:component-scan base-package="com.ye.controller" />
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
</beans>
<!-- web.xml -->
<!-- 路径 WebContent/WEB-INF/web.xml -->
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE xml>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee:description" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee:servlet-class http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>student-ssm</display-name>
<absolute-ordering />
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
没有 web.xml 文件?
Dynamic Web Module 2.5之后不再主动显示web.xml
生成 web.xml
步骤:右键项目名 – Java EE Tools – Generate Deployment Descriptor Stub
jsp页面
<!-- forward.jsp -->
<!-- 入口文件 -->
<!-- 路径 WebContent/forward.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
request.getRequestDispatcher("/stu/show.do").forward(request, response);
%>
</body>
</html>
<!-- index.jsp -->
<!-- 路径 WebContent/WEB-INF/jsp/index.jsp -->
<!-- WEB-INF下文件前端不可直接访问 -->
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ page import="java.util.*"%>
<%@ page import="com.ye.dao.StudentDao"%>
<%@ page import="com.ye.pojo.Student"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>学生管理系统</title>
<link rel="stylesheet" href="/student-ssm/layui/css/layui.css" media="all">
<script src="/student-ssm/layui/layui.js" charset="utf-8"></script>
</head>
<body class="layui-layout-body">
<div class="layui-layout layui-layout-admin">
<div class="layui-header">
<div class="layui-logo">学生信息管理</div>
<ul class="layui-nav layui-layout-right">
<li class="layui-nav-item"><a href="javascript:;"> <img
src="http://51hello.com/fr/10/u7350.jpg" class="layui-nav-img">
老易
</a>
<dl class="layui-nav-child">
<dd>
<a href="">基本资料</a>
</dd>
<dd>
<a href="">安全设置</a>
</dd>
</dl></li>
<li class="layui-nav-item"><a href="">退出</a></li>
</ul>
</div>
<div class="layui-side layui-bg-black">
<div class="layui-side-scroll">
<ul class="layui-nav layui-nav-tree" lay-filter="test">
<li class="layui-nav-item"><a href="/student-ssm/stu/show.do">主页</a></li>
</ul>
</div>
</div>
<div class="layui-body">
<div style="padding: 15px;">
<fieldset class="layui-elem-field layui-field-title"
style="margin-top: 50px;">
<legend>学生信息表</legend>
</fieldset>
<table class="layui-table" lay-even="" lay-skin="row">
<colgroup>
<col width="150">
<col width="150">
<col width="150">
<col>
</colgroup>
<thead>
<tr>
<th>学号</th>
<th>姓名</th>
<th>年龄</th>
<th>修改</th>
</tr>
</thead>
<tbody>
<c:forEach items="${list}" var="s">
<tr>
<td>${s.id}</td>
<td>${s.name}</td>
<td>${s.age}</td>
<th>
<form action="/student-ssm/stu/getupdate/${s.id}.do" method="POST">
<input type="submit" value="修改" class="layui-btn layui-btn-normal layui-btn-radius"/>
</form>
</th>
</tr>
</c:forEach>
</tbody>
</table>
<fieldset class="layui-elem-field layui-field-title"
style="margin-top: 20px;">
<legend>数据查询</legend>
</fieldset>
<div class="layui-form-item">
<form action="/student-ssm/stu/select.do" method="POST">
<label class="layui-form-label">学号</label>
<div class="layui-input-inline">
<input type="text" name="id" autocomplete="off" class="layui-input">
</div>
<input type="submit" class="layui-btn layui-btn-normal layui-btn-radius" value="查询" />
</form>
</div>
<fieldset class="layui-elem-field layui-field-title"
style="margin-top: 50px;">
<legend>增加信息</legend>
</fieldset>
<div class="layui-form-item">
<form action="/student-ssm/stu/add.do" method="POST">
<label class="layui-form-label">姓名</label>
<div class="layui-input-inline">
<input type="text" name="add_name" autocomplete="off" class="layui-input">
</div>
<label class="layui-form-label">年龄</label>
<div class="layui-input-inline">
<input type="text" name="add_age" autocomplete="off" class="layui-input">
</div>
<input type="submit" class="layui-btn layui-btn-normal layui-btn-radius" value="添加" />
</form>
</div>
<fieldset class="layui-elem-field layui-field-title"
style="margin-top: 50px;">
<legend>删除信息</legend>
</fieldset>
<div class="layui-form-item">
<form action="/student-ssm/stu/delete.do" method="post">
<label class="layui-form-label">学号</label>
<div class="layui-input-inline">
<input type="text" name="del_id" autocomplete="off" class="layui-input">
</div>
<input type="submit" class="layui-btn layui-btn-normal layui-btn-radius" value="删除" />
</form>
</div>
</div>
</div>
<div class="layui-footer">
© Ye
</div>
</div>
</body>
</html>
<!-- update.jsp -->
<!-- 路径 WebContent/WEB-INF/jsp/update.jsp -->
<!-- WEB-INF下文件前端不可直接访问 -->
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>修改学生信息</title>
<link rel="stylesheet" href="/student-ssm/layui/css/layui.css"
media="all">
</head>
<body class="layui-layout-body">
<div class="layui-layout layui-layout-admin">
<div class="layui-header">
<div class="layui-logo">学生信息管理</div>
<ul class="layui-nav layui-layout-right">
<li class="layui-nav-item"><a href="javascript:;"> <img
src="http://51hello.com/fr/10/u7350.jpg" class="layui-nav-img">
老易
</a>
<dl class="layui-nav-child">
<dd>
<a href="">基本资料</a>
</dd>
<dd>
<a href="">安全设置</a>
</dd>
</dl></li>
<li class="layui-nav-item"><a href="">退出</a></li>
</ul>
</div>
<div class="layui-side layui-bg-black">
<div class="layui-side-scroll">
<ul class="layui-nav layui-nav-tree" lay-filter="test">
<li class="layui-nav-item"><a href="/student-ssm/stu/show.do">主页</a></li>
</ul>
</div>
</div>
<div class="layui-body">
<div style="padding: 15px;">
<fieldset class="layui-elem-field layui-field-title"
style="margin-top: 20px;">
<legend>修改数据</legend>
</fieldset>
<form action="/student-ssm/stu/updatedata.do" method="post">
<table class="layui-table" lay-even="" lay-skin="row">
<colgroup>
<col width="150">
<col width="150">
<col width="150">
<col>
</colgroup>
<thead>
<tr>
<th>学号</th>
<th>姓名</th>
<th>年龄</th>
</tr>
</thead>
<tbody>
<c:forEach items="${list}" var="s">
<tr>
<td>
${s.id}
<input type="hidden" name="mody_id" value="${s.id}" />
</td>
<td>
<div class="layui-input-inline">
<input type="text" name="mody_name" autocomplete="off"
class="layui-input" value="${s.name}">
</div>
<td>
<div class="layui-input-inline">
<input type="text" name="mody_age" autocomplete="off"
class="layui-input" value="${s.age}">
</div>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<input type="submit"
class="layui-btn layui-btn-normal layui-btn-radius" value="修改" />
</form>
</div>
</div>
<div class="layui-footer">
© Ye
</div>
</div>
</body>
</html>
WebContent/WEB-INF/lib 路径下放jar包
项目下载
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