spring整合mybatis
0.导入pom
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- mysql数据库驱动程序-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.23</version>
</dependency>
<!-- 数据库连接池-->
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
<version>4.0.3</version>
</dependency>
<!-- mybatis 依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.6</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!-- 输出sql语句-->
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.13.3</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.8.0-beta0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.8.0-beta0</version>
</dependency>
<!-- spring 依赖 Controller、Model等-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.3.3</version>
</dependency>
<!-- spring-web注解包 RequestMapping ...-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version> 5.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
</dependencies>
1.创建数据库配置文件(db.properties)
datasource.driverClassName=com.mysql.cj.jdbc.Driver
datasource.url=jdbc:mysql://localhost:3306/pdd?serverTimezone=GMT&useUnicode=true&characterEncoding=UTF-8
datasource.username=root
datasource.password=123456
#配置数据相关 使用HikariCP
datasource.type=com.zaxxer.hikari.HikariDataSource
datasource.hikari.minimum-idle=5
datasource.hikari.maximum-pool-size=15
datasource.hikari.auto-commit=true
datasource.hikari.idle-timeout=30000
datasource.hikari.pool-name=DatebookHikariCP
datasource.hikari.max-lifetime=1800000
datasource.hikari.connection-timeout=30000
datasource.hikari.connection-test-query=SELECT 1
2.创建spring.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"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
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 http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">
<!-- spring 导入 其他配置 可以删除-->
<import resource="classpath:springBean/*"/>
<!--指定数据源配置文件-->
<context:property-placeholder location="classpath:db.properties" ignore-unresolvable="true"/>
<!-- 配置数据源（数据库连接池）-->
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
<property name="driverClassName" value="${datasource.driverClassName}"/>
<property name="jdbcUrl" value="${datasource.url}"/>
<property name="username" value="${datasource.username}"/>
<property name="password" value="${datasource.password}"/>
<property name="connectionTimeout" value="${datasource.hikari.connection-timeout}"/>
<property name="idleTimeout" value="${datasource.hikari.idle-timeout}"/>
<property name="maxLifetime" value="${datasource.hikari.max-lifetime}"/>
<property name="maximumPoolSize" value="${datasource.hikari.maximum-pool-size}"/>
<property name="minimumIdle" value="${datasource.hikari.minimum-idle}"/>
<property name="connectionTestQuery" value="${datasource.hikari.connection-test-query}"/>
<property name="autoCommit" value="true"/>
</bean>
<!--定义sqlSessionFactory对象-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
<!--将数据源对象注入到当前这个对象-->
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<property name="configLocation" value="classpath:mybatis.xml"/>
</bean>
<!--创建连接对象-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg ref="sqlSessionFactory"/>
</bean>
<!--定义扫描mapper接口的配置对象-->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--指定sqlSessionFactory bean对象的名字-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--指定mapper接口所在的包名-->
<property name="basePackage" value="cdu.lzy.Dao"/>
</bean>
</beans>
3.配置mybatis文件（打印sql语句）(mybatis.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>
<!-- 打印查询语句 下面扫描的包的文件 -->
<setting name="logImpl" value="STDOUT_LOGGING" />
</settings>
<typeAliases>
<package name="cdu.lzy.Dao"/>
</typeAliases>
</configuration>
4.配置mybatis 映射文件(BlogMapper.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="cdu.lzy.Dao.BlogMapper">
<select id="selectAll" resultType="cdu.lzy.entity.Blog">
select * from blog
</select>
</mapper>
5.配置mybatis接口 (BlogMapper)
package cdu.lzy.Dao;
import cdu.lzy.entity.Blog;
import java.util.List;
public interface BlogMapper {
/**
* 查询所有的博客信息
*/
List<Blog> selectAll();
}
6.目录结构及测试方法
testSpring.java
cdu.lzy.Test1;
import cdu.lzy.Dao.BlogMapper;
import org.apache.ibatis.session.SqlSession;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class testSpring {
public static void main(String[] args) {
ApplicationContext applicationContext=new ClassPathXmlApplicationContext("spring.xml");
SqlSession sqlSession = (SqlSession) applicationContext.getBean("sqlSession");
BlogMapper mapper = sqlSession.getMapper(BlogMapper.class);
System.out.println(mapper.selectAll());
}
}