I wrote about the construction of mybatis above, now I will write about the integration of spring and mybatis;
1. Add dependencies to the pom file
Pay attention here if there is a java.lang.NoClassDefFoundError: org/apache/ibatis/cursor/Cursor error! The description is a version compatibility issue
Solution: use mybatis-spring1.3.0 and above for versions 3.4.0 and above of mybatis; use versions below mybatis-spring1.3.0 for versions below 3.4.0 of mybatis.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mybatis</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.8</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.0</version>
</dependency>
<!-- spring integration mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>
<!-- Spring-4.2.0 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>4.2.0.RELEASE</version>
</dependency>
</dependencies>
</project>
2. Delete the configuration of the database in mybatis-config.xml, because it is to be managed by spring
<?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>
<!-- <properties resource="database.properties"></properties>
<environments default="dev">
<environment id="dev">
<transactionManager type="jdbc"></transactionManager>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments> -->
<mappers>
<mapper resource="UserMapper.xml"/>
</mappers>
</configuration>
3. Under the resource, create a spring configuration file applicationContext.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- Auto Scan -->
<context:component-scan base-package="com.cn" />
<!-- Import properties file-->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:database.properties" />
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
</bean>
<!-- Spring and MyBatis are perfectly integrated, no configuration mapping file of mybatis is needed-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!-- mybatis spring sqlSessionTemplate, you can directly inject spring when you use it -->
<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
</bean>
<!-- (transaction management) transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>
4. The sqlSession obtained by the SqlSessionFactory class in the original service is now obtained by injection
package com.cn.service;
import javax.annotation.Resource;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.stereotype.Service;
import com.cn.mapper.UserMapper;
import com.cn.model.User;
@Service
public class UserService {
@Resource
private SqlSessionTemplate sqlSessionTemplate;
public User selectById(){
UserMapper mapper = sqlSessionTemplate.getMapper(UserMapper.class);
User user = mapper.selectById();
return user;
}
public User selectUserAndAddress(){
UserMapper mapper = sqlSessionTemplate.getMapper(UserMapper.class);
User user = mapper.selectUserAndAddress();
return user;
}
public int addUser(User user){
UserMapper mapper = sqlSessionTemplate.getMapper(UserMapper.class);
int count = mapper.addUser(user);
// curd In addition to the query, all things must be submitted
sqlSessionTemplate.commit();
return count;
}
}
5. Test
@Test
public void test5(){
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
UserService bean = (UserService)ctx.getBean(UserService.class);
User user = bean.selectById();
System.err.println(user.getLoginName());
}
6. Results
