前言

在这里插入图片描述

本文为 SpringMVC + Spring + Mybatis整合教程 相关详细介绍，从数据库数据准备、相关依赖包添加、创建项目基本结构和配置框架，到Mybatis层的编写、Spring层的编写、SpringMVC层的编写，再到前端页面编写等，最后进行运行与测试，按步骤对SSM框架整合进行详细的解析~

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一、数据库数据准备

运行以下sql脚本：

CREATE DATABASE `ssm`;
USE `ssm`;
DROP TABLE IF EXISTS `users`;
CREATE TABLE `ssm`.`users`  (`user_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',`user_name` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '用户名',`sex` char(1) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '性别,0男，1女',`tel` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '联系电话',`mail` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '邮件',`status` char(1) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL COMMENT '状态,0正常，1禁用',PRIMARY KEY (`user_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = '用户表' ROW_FORMAT = Dynamic;
INSERT INTO `users`(`user_name`, `sex`, `tel`, `mail`, `status`) VALUES 
('admin', '0', '123456', '', '0'),
('user1', '0', '123456', '', '0');

创建一个名为ssm的数据库，并在此数据库中创建users数据表，表中包含的属性：“用户名”，“性别”，“联系电话”，“邮件”，“状态”。

二、添加相关依赖包

🍀新建一个Maven项目（名称叫ssm-user），并添加web支持后，添加以下pom依赖。

pom.xml：

 <dependencies><!--Junit--><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><!--数据库驱动--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.20</version></dependency><!-- 数据库连接池 --><dependency><groupId>com.mchange</groupId><artifactId>c3p0</artifactId><version>0.9.5.2</version></dependency><!--Servlet - JSP --><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><!--Mybatis--><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.2</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>2.0.2</version></dependency><!--Spring--><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.1.9.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.1.9.RELEASE</version></dependency><!--lombok--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.4</version></dependency></dependencies>

🍀进行Maven资源过滤设置

pom.xml：

<build><resources><resource><directory>src/main/java</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource><resource><directory>src/main/resources</directory><includes><include>**/*.properties</include><include>**/*.xml</include></includes><filtering>false</filtering></resource></resources>
</build>

三、创建项目基本结构和配置框架

com.pojo
com.dao
com.service
com.controller

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四、Mybatis层的编写

🍀（1）添加数据库配置文件 database.properties，方便管理

database.properties：

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1/ssm?serverTimezone=UTC&amp&useUnicode=true&amp&characterEncoding=utf8&amp&useSSL=false
jdbc.username=root
jdbc.password=root

🍀（2）添加实体Users，使用lombok来创建get/set方法

Users.java：

package com.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/*** 用户实体类*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Users {private Integer userId;private String userName;private String sex;private String tel;private String mail;private String status;
}

🍀（3）编写Dao层的 Mapper 接口

UsersMapper.java：

package com.dao;
import com.pojo.Users;
import java.util.List;
/*** 用户 mapper*/
public interface UsersMapper {/*** 查询所有用户*/List<Users> queryAll();/*** 根据ID查询用户*/Users queryById(int id);/*** 添加用户*/int addUser(Users users);/*** 修改用户*/int updateUser(Users users);/*** 根据ID删除用户*/int deleteById(int id);
}

🍀（4）编写接口对应的 Mapper.xml 文件

UsersMapper.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dao.UsersMapper"><resultMap id="users" type="com.pojo.Users"><result column="user_id" property="userId" /><result column="user_name" property="userName" /><result column="sex" property="sex" /><result column="tel" property="tel" /><result column="mail" property="mail" /><result column="status" property="status" /></resultMap><select id="queryAll" resultMap="users">SELECT * FROM `users`</select><select id="queryById" resultMap="users">SELECT * FROM `users`where user_id = #{id}</select><insert id="addUser">INSERT INTO `users`(`user_name`, `sex`, `tel`, `mail`, `status`)VALUES(#{userName}, #{sex}, #{tel}, #{mail}, #{status})</insert><update id="updateUser">UPDATE `users` SET`user_name` = #{userName},`sex` = #{sex},`tel` = #{tel},`mail` = #{mail}WHERE `user_id` = #{userId}</update><delete id="deleteById">delete from users where user_id=#{userId}</delete>
</mapper>

🍀（5）编写Service层的接口和实现类

UsersService.java：

package com.service;
import com.pojo.Users;
import java.util.List;
public interface UsersService {/*** 查询所有用户*/List<Users> queryAll();/*** 根据ID查询用户*/Users queryById(int id);/*** 添加用户*/int addUser(Users users);/*** 修改用户*/int updateUser(Users users);/*** 根据ID删除用户*/int deleteById(int id);
}

UsersServiceImpl.java：

package com.service.impl;
import com.dao.UsersMapper;
import com.pojo.Users;
import com.service.UsersService;
import java.util.List;
public class UsersServiceImpl implements UsersService {//调用dao层的操作，设置一个set接口，方便Spring管理private UsersMapper usersMapper;public void setUsersMapper(UsersMapper usersMapper) {this.usersMapper = usersMapper;}@Overridepublic List<Users> queryAll() {return usersMapper.queryAll();}@Overridepublic Users queryById(int id) {return usersMapper.queryById(id);}@Overridepublic int addUser(Users users) {users.setStatus("0");return usersMapper.addUser(users);}@Overridepublic int updateUser(Users users) {return usersMapper.updateUser(users);}@Overridepublic int deleteById(int id) {return usersMapper.deleteById(id);}
}

五、Spring层的编写

🍀编写Spring整合Mybatis的相关的配置文件

配置Spring整合MyBatis，我们这里数据源使用c3p0连接池。

spring-dao.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:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsd"><!-- 配置整合mybatis --><!-- 1.关联数据库文件 --><context:property-placeholder location="classpath:config/database.properties"/><!-- 2.数据库连接池 --><!--数据库连接池dbcp  半自动化操作  不能自动连接c3p0  自动化操作（自动的加载配置文件 并且设置到对象里面）--><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><!-- 配置连接池属性 --><property name="driverClass" value="${jdbc.driver}"/><property name="jdbcUrl" value="${jdbc.url}"/><property name="user" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/><!-- c3p0连接池的私有属性 --><property name="maxPoolSize" value="30"/><property name="minPoolSize" value="10"/><!-- 关闭连接后不自动commit --><property name="autoCommitOnClose" value="false"/><!-- 获取连接超时时间 --><property name="checkoutTimeout" value="10000"/><!-- 当获取连接失败重试次数 --><property name="acquireRetryAttempts" value="2"/></bean><!-- 3.配置SqlSessionFactory对象 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 注入数据库连接池 --><property name="dataSource" ref="dataSource"/><!-- 配置MyBaties全局配置文件:mybatis-config.xml --><property name="configLocation" value="classpath:config/mybatis-config.xml"/></bean><!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 --><!--解释 ： https://www.cnblogs.com/jpfss/p/7799806.html--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!-- 注入sqlSessionFactory --><property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/><!-- 给出需要扫描Dao接口包 --><property name="basePackage" value="com.dao"/></bean>
</beans>

🍀编写Spring整合service层的相关配置文件

spring-service.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:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 扫描service相关的bean --><context:component-scan base-package="com.service" /><!--BookServiceImpl注入到IOC容器中--><bean id="UsersServiceImpl" class="com.service.impl.UsersServiceImpl"><property name="usersMapper" ref="usersMapper"/></bean><!-- 配置事务管理器 --><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><!-- 注入数据库连接池 --><property name="dataSource" ref="dataSource" /></bean>
</beans>

spring就是一个容器，作用是用来管理其它东西。

六、SpringMVC层的编写

🍀配置web.xml与spring-mvc.xml配置文件

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><!--DispatcherServlet--><servlet><servlet-name>DispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！--><param-value>classpath:config/applicationContext.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>DispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!--encodingFilter--><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>utf-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--Session过期时间--><session-config><session-timeout>15</session-timeout></session-config>
</web-app>

spring-mvc.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:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttps://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 配置SpringMVC --><!-- 1.开启SpringMVC注解驱动 --><mvc:annotation-driven/><!-- 2.静态资源默认servlet配置--><mvc:default-servlet-handler/><!-- 3.配置jsp 显示ViewResolver视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/><property name="prefix" value="/WEB-INF/jsp/"/><property name="suffix" value=".jsp"/></bean><!-- 4.扫描web相关的bean --><context:component-scan base-package="com.controller"/>
</beans>

🍀编写Controller层

UsersController.java：

package com.controller;
import com.pojo.Users;
import com.service.UsersService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
@RequestMapping("/users")
public class UsersController {@Autowired@Qualifier("UsersServiceImpl")private UsersService usersService;/*** 查询所有用户*/@RequestMapping("/all")public String list(Model model) {List<Users> list = usersService.queryAll();model.addAttribute("list", list);return "users/allUsers";}/*** 根据ID查询用户*/@RequestMapping("/{id}")public String queryById(@PathVariable int id,Model model) {model.addAttribute("users",usersService.queryById(id));return "users/info";}/*** 去添加用户页面*/@RequestMapping("/toAdd")public String toAddUser() {return "users/add";}/*** 添加用户*/@RequestMapping("/add")public String addUser(Users users) {usersService.addUser(users);return "redirect:/users/all";}/*** 去修改页面* @return*/@RequestMapping("/toUpdate")public String toUpdateUser(int id,Model model) {model.addAttribute("users",usersService.queryById(id));return "users/update";}/*** 修改用户*/@RequestMapping("/update")public String updateUser(Users users) {usersService.updateUser(users);return "redirect:/users/all";}/*** 根据ID删除用户*/@RequestMapping("/del/{id}")public String deleteById(@PathVariable int id) {usersService.deleteById(id);return "redirect:/users/all";}
}

七、前端页面编写

🍀（1）首页： index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head><title>首页</title><style type="text/css">a {text-decoration: none;color: black;font-size: 18px;}h3 {width: 180px;height: 38px;margin: 100px auto;text-align: center;line-height: 38px;background: deepskyblue;border-radius: 4px;}</style>
</head>
<body>
<h3><a href="${pageContext.request.contextPath}/users/all">点击进入列表页</a>
</h3>
</body>
</html>

🍀（2）用户列表页面：allUser.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>用户列表</title><meta name="viewport" content="width=device-width, initial-scale=1.0"><!-- 引入 Bootstrap --><link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container"><div class="row clearfix"><div class="col-md-12 column"><div class="page-header"><h1><small>用户列表</small></h1></div></div></div><div class="row"><div class="col-md-4 column"><a class="btn btn-primary" href="${pageContext.request.contextPath}/users/toAdd">新增</a></div></div><div class="row clearfix"><div class="col-md-12 column"><table class="table table-hover table-striped"><thead><tr><th>序号</th><th>用户名称</th><th>用户性别</th><th>用户电话</th><th>操作</th></tr></thead><tbody><c:forEach var="user" items="${requestScope.get('list')}"><tr><td>${user.getUserId()}</td><td>${user.getUserName()}</td><td>${user.getSex()==0?"男":"女"}</td><td>${user.getTel()}</td><td><a href="${pageContext.request.contextPath}/users/${user.getUserId()}">详情</a> |<a href="${pageContext.request.contextPath}/users/toUpdate?id=${user.getUserId()}">更改</a> |<a href="${pageContext.request.contextPath}/users/del/${user.getUserId()}">删除</a></td></tr></c:forEach></tbody></table></div></div>
</div>

🍀（3）添加用户页面：add.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>新增用户</title><meta name="viewport" content="width=device-width, initial-scale=1.0"><!-- 引入 Bootstrap --><link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container"><div class="row clearfix"><div class="col-md-12 column"><div class="page-header"><h1><small>新增用户</small></h1></div></div></div><form action="${pageContext.request.contextPath}/users/add" method="post">用户名称：<input type="text" name="userName"><br><br><br>用户性别：<input type="radio" name="sex" value="0" checked>男<input type="radio" name="sex" value="1">女<br><br><br>用户电话：<input type="text" name="tel"><br><br><br>用户邮箱：<input type="text" name="mail"><br><br><br><input type="submit" value="添加"></form>
</div>

🍀（4）修改用户页面：update.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>修改用户</title><meta name="viewport" content="width=device-width, initial-scale=1.0"><!-- 引入 Bootstrap --><link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container"><div class="row clearfix"><div class="col-md-12 column"><div class="page-header"><h1><small>修改用户</small></h1></div></div></div><form action="${pageContext.request.contextPath}/users/update" method="post"><input type="hidden" name="userId" value="${users.getUserId()}"/>用户名称：<input type="text" name="userName" value="${users.getUserName()}"><br><br><br>用户性别：<input type="radio" name="sex" value="0" ${users.getSex()==0?"checked":""} >男<input type="radio" name="sex" value="1" ${users.getSex()!=0?"checked":""} >女<br><br><br>用户电话：<input type="text" name="tel" value="${users.getTel()}"><br><br><br>用户邮箱：<input type="text" name="mail" value="${users.getMail()}"><br><br><br><input type="submit" value="修改"></form>
</div>

🍀（5）用户详情页面：info.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>详情信息</title><meta name="viewport" content="width=device-width, initial-scale=1.0"><!-- 引入 Bootstrap --><link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container"><div class="row clearfix"><div class="col-md-12 column"><div class="page-header"><h1><small>详情信息</small></h1></div></div></div>用户名称：${users.getUserName()} <br>用户性别：${users.getSex()==0?"男":"女"} <br>用户电话：${users.getTel()} <br>用户邮箱：${users.getMail()} <br>用户状态：${users.getStatus()==0?"正常":"禁用"}  <br><a href="${pageContext.request.contextPath}/users/all">返回</a>
</div>