SpringBoot整合MyBatis【数据库连接】

1、pom文件引入

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <!-- 测试 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- mysql 依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- springboot-web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

2、application.properties配置文件

spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

3、配置DataSourceConfig ;

package com.yuhuiqing.config;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;


@Configuration
@MapperScan(basePackages = "com.yuhuiqing.mapper", sqlSessionFactoryRef = "SqlSessionFactory")
public class DataSourceConfig {

    @Bean(name = "DataSource")
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource testDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "SqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("DataSource") DataSource dataSource)
            throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));
        return bean.getObject();
    }
    @Bean(name = "TransactionManager")
    public DataSourceTransactionManager testTransactionManager(@Qualifier("DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
    @Bean(name = "SqlSessionTemplate")
    public SqlSessionTemplate testSqlSessionTemplate(
            @Qualifier("SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }


}

4、创建对应的Mapper层service层就可以直接连接使用了！

<?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.yuhuiqing.mapper.CountManageMapper" >
    <select id="getInfo" parameterType="com.yuhuiqing.entities.CountManage" resultType="com.yuhuiqing.entities.CountManage">
        SELECT
        ID id,
        HQ_TITLE hqTitle,
        HQ_COUNT hqCount,
        HQ_PASSWORD hqPassword,
        HQ_LINKADD hqLinkadd
        FROM COUNT_MANAGE
        WHERE ISDELETE='N'
        <if test="hqTitle != null and hqTitle != ''">
            and HQ_TITLE like concat('%',#{hqTitle},'%')
        </if>
    </select>
    <insert id="add" parameterType="com.yuhuiqing.entities.CountManage" >
  insert into COUNT_MANAGE(HQ_TITLE,
    HQ_COUNT ,
    HQ_PASSWORD ,
    HQ_LINKADD,
    HQ_REMARK)
    values (#{hqTitle},#{hqCount},#{hqPassword},#{hqLinkadd},#{hqRemark})
</insert>
    <update id="delete" parameterType="com.yuhuiqing.entities.CountManage" >
  update COUNT_MANAGE set ISDELETE='Y' where ID=#{id}
</update>
    <update id="update" parameterType="com.yuhuiqing.entities.CountManage" >
        update COUNT_MANAGE set ID=#{id}
        <if test="hqTitle != null and hqTitle != ''">
            , HQ_TITLE = #{hqTitle}
        </if>
        <if test="hqCount != null and hqCount != ''">
            , HQ_COUNT = #{hqCount}
        </if>
        <if test="hqPassword != null and hqPassword != ''">
            , HQ_PASSWORD = #{hqPassword}
        </if>
        <if test="hqLinkadd != null and hqLinkadd != ''">
            , HQ_LINKADD = #{hqLinkadd}
        </if>
        <if test="hqRemark != null and hqRemark != ''">
            , HQ_REMARK = #{hqRemark}
        </if>
        where ID=#{id}
    </update>
</mapper>