总体结构

1.bean对象

package com.bjpowernode.pojo;

public class Users {
    private Integer userid;
    private String username;
    private String upass;

    @Override
    public String toString() {
        return "Users{" +
                "userid=" + userid +
                ", username='" + username + '\'' +
                ", upass='" + upass + '\'' +
                '}';
    }

    public Integer getUserid() {
        return userid;
    }

    public void setUserid(Integer userid) {
        this.userid = userid;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getUpass() {
        return upass;
    }

    public void setUpass(String upass) {
        this.upass = upass;
    }

    public Users(Integer userid, String username, String upass) {
        this.userid = userid;
        this.username = username;
        this.upass = upass;
    }

    public Users() {
    }
}

2.jdbc.properties

#jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/jz09?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
jdbc.username=root
jdbc.password=123456

3.SqlMapConfig.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>
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
</configuration>

4.applicationContext_mapper.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">

    <!--读取属性文件-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--配置SqlSessionFactoryBean-->
    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--配置数据源-->
        <property name="dataSource" ref="dataSource"></property>
        <!--配置SqlMapConfig.xml核心配置-->
        <property name="configLocation" value="SqlMapConfig.xml"></property>
        <!--注册实体类-->
        <property name="typeAliasesPackage" value="com.bjpowernode.pojo"></property>
    </bean>
    <!--注册mapper.xml文件-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.bjpowernode.mapper"></property>
    </bean>
</beans>

5.applicationContext_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/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <import resource="applicationContext_mapper.xml"></import>
    <!--SM基于注解的开发，所以添加扫描-->
    <context:component-scan base-package="com.bjpowernode.service.impl"></context:component-scan>
</beans>

6.UserMapper.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.bjpowernode.mapper.UsersMapper">
    <insert id="insert" parameterType="Users">
        insert into users value (#{userid},#{username},#{upass})
    </insert>
</mapper>

7.UserMapper接口

package com.bjpowernode.mapper;

import com.bjpowernode.pojo.Users;

public interface UsersMapper {
    int insert(Users users);
}

8.UsersService接口

package com.bjpowernode.service;

import com.bjpowernode.pojo.Users;

public interface UsersService {
    //增加用户
    int insert(Users users);
}

9.UsersServiceImpl

package com.bjpowernode.service.impl;

import com.bjpowernode.mapper.UsersMapper;
import com.bjpowernode.pojo.Users;
import com.bjpowernode.service.UsersService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UsersServiceImpl implements UsersService {
    @Autowired
    UsersMapper usersMapper;

    @Override
    public int insert(Users users) {
        return usersMapper.insert(users);
    }
}