SpringBoot之集成MyBatis

1. 引入工程依赖包

<dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-web</artifactid>
        </dependency>

        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-test</artifactid>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupid>mysql</groupid>
            <artifactid>mysql-connector-java</artifactid>
            <version>5.1.47</version>
        </dependency>

        <dependency>
            <groupid>org.mybatis.spring.boot</groupid>
            <artifactid>mybatis-spring-boot-starter</artifactid>
            <version>1.3.0</version>
        </dependency>

        <dependency>
            <groupid>com.alibaba</groupid>
            <artifactid>druid-spring-boot-starter</artifactid>
            <version>1.1.16</version>
        </dependency>
        <dependency>
            <groupid>org.projectlombok</groupid>
            <artifactid>lombok</artifactid>
            <version>1.18.10</version>
        </dependency>

1. 编写dao接口

package com.example.mybatis.repository;

import com.example.mybatis.domain.smscoupon;
import org.apache.ibatis.annotations.param;

/**
 * @author shanks on 2019-11-09
 */

public interface smscoupondao {


    smscoupon querybyid(@param("id") integer id);
}

1. 编写sql配置文件（本人不太习惯注解，习惯将sql写在配置文件中）

<?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.example.mybatis.repository.smscoupondao">

    <resultmap type="com.example.mybatis.domain.smscoupon" id="smscouponmap">
        <result property="id" column="id" jdbctype="integer"/>
        <result property="type" column="type" jdbctype="integer"/>
        <result property="name" column="name" jdbctype="varchar"/>
        <result property="platform" column="platform" jdbctype="integer"/>
        <result property="count" column="count" jdbctype="integer"/>
        <result property="amount" column="amount" jdbctype="numeric"/>
        <result property="perlimit" column="per_limit" jdbctype="integer"/>
        <result property="minpoint" column="min_point" jdbctype="numeric"/>
        <result property="starttime" column="start_time" jdbctype="timestamp"/>
        <result property="endtime" column="end_time" jdbctype="timestamp"/>
        <result property="usetype" column="use_type" jdbctype="integer"/>
        <result property="note" column="note" jdbctype="varchar"/>
        <result property="publishcount" column="publish_count" jdbctype="integer"/>
        <result property="usecount" column="use_count" jdbctype="integer"/>
        <result property="receivecount" column="receive_count" jdbctype="integer"/>
        <result property="enabletime" column="enable_time" jdbctype="timestamp"/>
        <result property="code" column="code" jdbctype="varchar"/>
        <result property="memberlevel" column="member_level" jdbctype="integer"/>
    </resultmap>

    <!--查询单个-->
    <select id="querybyid" resultmap="smscouponmap">
        select
          id, type, name, platform, count, amount, per_limit, min_point, start_time, end_time, use_type, note, publish_count, use_count, receive_count, enable_time, code, member_level
        from mall.sms_coupon
        where id = #{id}
    </select>

</mapper>

1. 配置mybatis配置类,也可以放在启动类上

package com.example.mybatis.config;

import org.mybatis.spring.annotation.mapperscan;
import org.springframework.context.annotation.configuration;

/**
 * @author shanks on 2019-11-09
 */
@configuration
@mapperscan("com.example.mybatis.repository")
public class mybatisconfig {
}

1. 配置application.yml文件

spring:
  datasource:
    #数据源基本配置
    url: jdbc:mysql://localhost:3306/mall?allowmultiqueries=true&characterencoding=utf-8&usessl=false
    type: com.alibaba.druid.pool.druiddatasource
    driver-class-name: com.mysql.jdbc.driver
    username: root
    password: 123456
    druid:
      #连接池配置， 初始化大小，最小，最大
      initial-size: 5
      max-active: 10
      #配置获取连接等待超时的时间
      max-wait: 60000
      #配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
      time-between-eviction-runs-millis: 60000
      #配置一个连接在池中最小生存的时间，单位是毫秒
      min-evictable-idle-time-millis: 300000
      validation-query: select 1
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false

mybatis:
  mapper-locations: classpath:mybatis/mapper/*.xml

1. 编写controller,调用mybatis

package com.example.mybatis.web;

import com.example.mybatis.domain.smscoupon;
import com.example.mybatis.service.smscouponservice;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestparam;
import org.springframework.web.bind.annotation.restcontroller;

/**
 * @author shanks on 2019-11-09
 */
@restcontroller
@requestmapping("/voucher/web/")
public class smscouponcontroller {

    @autowired
    smscouponservice smscouponservice;

    @requestmapping("/querysmscoupondetail")
    public smscoupon querysmscoupondetail(@requestparam("id") int id){
        smscoupon smscoupon = smscouponservice.querysmscoupondetail(id);
        return smscoupon;
    }
}

package com.example.mybatis.service;

import com.example.mybatis.domain.smscoupon;

/**
 * @author shanks on 2019-11-09
 */
public interface smscouponservice {
    smscoupon querysmscoupondetail(int id);
}

package com.example.mybatis.service.impl;

import com.example.mybatis.domain.smscoupon;
import com.example.mybatis.repository.smscoupondao;
import com.example.mybatis.service.smscouponservice;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;

/**
 * @author shanks on 2019-11-09
 */
@service
public class smscouponserviceimpl implements smscouponservice {

    @autowired
    private smscoupondao smscoupondao;

    @override
    public smscoupon querysmscoupondetail(int id) {
        smscoupon smscoupon = smscoupondao.querybyid(id);
        return smscoupon;
    }
}

package com.example.mybatis;

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;

@springbootapplication
public class demomybatisapplication {

    public static void main(string[] args) {
        springapplication.run(demomybatisapplication.class, args);
    }

}

源代码：https://gitee.com/shanksv/springboot-mybatis.git