介绍
mybatis在现在市场占有率相对比较高,使用较多的一个框架,所以本文主要介绍如何将mybatis集成到springboot中进行使用,在之前使用springmvc中集成mybatis非常麻烦,而且有很多xml配置文件,配置起来非常臃肿,而且维护起来复杂,往往整理这些配置文件就需要花很长时间才能基础搭建起来,springboot集成mybatis完全抛弃之前的xml文件,经过几个简单的配置就可以完成对mybaties的集成。
一、配置数据源与mybatis扫描路径 application.properties
#1.jdbc config spring.datasource.type=com.alibaba.druid.pool.DruidDataSource spring.datasource.url=jdbc:mysql://localhost:3306/boot?characterEncoding=utf-8&generateSimpleParameterMetadata=true spring.datasource.username=root spring.datasource.password=123456 spring.datasource.driver-class-name=com.mysql.jdbc.Driver #2.extend config spring.datasource.initialSize=5 spring.datasource.minIdle=5 spring.datasource.maxActive=20 spring.datasource.maxWait=60000 spring.datasource.timeBetweenEvictionRunsMillis=60000 spring.datasource.minEvictableIdleTimeMillis=300000 spring.datasource.validationQuery=SELECT 1 FROM DUAL spring.datasource.testWhileIdle=true spring.datasource.testOnBorrow=false spring.datasource.testOnReturn=false spring.datasource.poolPreparedStatements=true spring.datasource.maxPoolPreparedStatementPerConnectionSize=20 spring.datasource.filters=stat,wall,log4j spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000 #mybaties config mybatis.typeAliasesPackage=com.eshengtai.dao.model mybatis.mapperLocations=classpath:**/mapper/*.xml
1、mybatis.typeAliasesPackage 扫描java基础实体类
2、mybatis.mapperLocations 扫描dao层mybatis接口实现*mapper.xml对应SQL语句文件
二、定义实体类与接口dao类,mapper.xml文件
package com.eshengtai.dao.model; public class EShengTai { private Long id; private String name; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
@Mapper public interface EShengTaiMapper { List<EShengTai> selectAll(); void insert(EShengTai est); }
<?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.eshengtai.dao.mapper.EShengTaiMapper" > <resultMap id="BaseResultMap" type="com.eshengtai.dao.model.EShengTai" > <id column="id" property="id" jdbcType="BIGINT" /> <result column="Name" property="name" jdbcType="VARCHAR" /> </resultMap> <sql id="Base_Column_List" > id, name </sql> <select id="selectAll" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from eshengtai </select> <insert id="insert" parameterType="com.eshengtai.dao.model.EShengTai" > insert into eshengtai (id,name) values (#{id,jdbcType=BIGINT}, #{name,jdbcType=VARCHAR}) </insert> </mapper>
三、启动springboot扫描mybatis接口文件
package com.eshengtai; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication @MapperScan("com.eshengtai.dao.mapper") public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
@MapperScan("com.eshengtai.dao.mapper") 在springboot启动时候会将接口注入到spring扫描的容器中,在dao层调用时候会自行依赖关联实现
以上所有的代码就是springboot集成mybatis最精简的配置,其他的调用方式和以来注入方式都和以前一样,以图片的方式展示其他代码,springboot事务详情文章我会在后面的文章中独立详解