SSM整合SpringMVC + Spring + Mybatis整合详细教程

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前言

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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目录

文章标题

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

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 mapper
        PUBLIC "-//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;
    
    @Override
    public List<Users> queryAll() 
        return usersMapper.queryAll();
    
    @Override
    public Users queryById(int id) 
        return usersMapper.queryById(id);
    
    @Override
    public int addUser(Users users) 
        users.setStatus("0");
        return usersMapper.addUser(users);
    
    @Override
    public int updateUser(Users users) 
        return usersMapper.updateUser(users);
    
    @Override
    public 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/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://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以上是关于SSM整合SpringMVC + Spring + Mybatis整合详细教程的主要内容,如果未能解决你的问题,请参考以下文章

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