MyBatis与Spring集成

Spring2只支持iBatis2,Spring3是不支持MyBatis3的,所以MyBatis自开发了一个集成Spring框架的项目MyBatis-Spring。该项目集成Spring,可以将事务交给Spring进行管理,同时将mapper类、sqlSession注入到其它类中。

 

项目地址:https://github.com/mybatis/spring
官方帮助文档(英文):http://mybatis.github.io/spring/index.html
官方帮助文档(中文):http://mybatis.github.io/spring/zh/index.html

 

MyBatis进行数据处理的核心是SqlSession,SqlSession又通过SqlSessionFactory产生,在MyBatis 中SqlSessionFactory由SqlSessionFactoryBuilder创建,与Spring集成后通过 SqlSessionFactoryBean产生。SqlSession的创建方式有两种:一种是通过SqlSessionTemplate创建,还有一 种是通过继承SqlSessionDaoSupport后调用getSqlSession方法获得。其实还有一种隐式的创建方式是通过自动扫描 Mapper类,然后框架会自动注入SqlSession。

 

具体的配置方式如下:


(1)spring-mybatis.xml:集成的配置,三种方式选择一种即可。

<?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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd">

	<context:component-scan base-package="com.research.mybatis"></context:component-scan>

	<!-- 创建SqlSessionFactory,同时指定数据源 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="configLocation"
			value="classpath:generator/spring/spring-mybatis-config.xml"></property>
	</bean>

	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url"
			value="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf8&amp;generateSimpleParameterMetadata=true" />
		<property name="username" value="root" />
		<property name="password" value="root" />
	</bean>
	
	<!-- 方式1、使用继承SqlSessionDaoSupport方式 -->
	<bean id="mybatisSpringDaoUseDaoSupport"
		class="com.research.mybatis.spring.MybatisSpringDaoUseDaoSupport">
		<property name="sqlSessionFactory" ref="sqlSessionFactory" />
	</bean>

	<!-- 方式2、使用sqlSessionTemplate方式 -->
	<bean id="mybatisSpringDaoUseTemplate" class="com.research.mybatis.spring.MybatisSpringDaoUseTemplate">
		<property name="sqlSession" ref="sqlSession"></property>
	</bean>

	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
		<constructor-arg ref="sqlSessionFactory"></constructor-arg>
	</bean>

	<!-- 方式3、使用扫描Mapper类的方式 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
		<property name="basePackage" value="com.research.mybatis.generator.dao"></property>
	</bean>

</beans>

 
(2)spring-mybatis-config.xml:这个是MyBatis相关的配置,不需要配置太多,因为集成的时候环境配置、数据源配置、事务配置都交给Spring去管理了。

<?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>
	<typeAliases>
		<typeAlias alias="AgentInvokeGenerate" type="com.research.mybatis.generator.model.AgentInvokeGenerate"/>
	</typeAliases>
	<mappers>
		<mapper resource="generator/mapper/AgentInvokeGenerateMapper.xml"></mapper>
	</mappers>
</configuration>

 (3)AgentInvokeGenerateMapper.xml:具体Sql

<?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.research.mybatis.generator.dao.AgentInvokeGenerateMapper">
  
  <resultMap id="BaseResultMap" type="com.research.mybatis.generator.model.AgentInvokeGenerate">
    <id column="ID" jdbcType="CHAR" property="ID" />
    <result column="DB_FLAG" jdbcType="VARCHAR" property="dbFlag" />
    <result column="STATUS" jdbcType="CHAR" property="STATUS" />
  </resultMap>
  
  <select id="selectByPrimaryKey" parameterType="java.lang.String" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from agent_info
    where ID = #{ID,jdbcType=CHAR}
  </select>
</mapper>

 

具体调用的代码如下:


(1)使用SqlSessionTemplate方式:

package com.research.mybatis.spring;

import org.apache.ibatis.session.SqlSession;

import com.research.mybatis.generator.model.AgentInvokeGenerate;

public class MybatisSpringDaoUseTemplate {

    private SqlSession sqlSession;
    
    public AgentInvokeGenerate getAgentInvokeById(String id){
        return sqlSession.selectOne("com.research.mybatis.generator.dao.AgentInvokeGenerateMapper.selectByPrimaryKey", id);
    }

    public SqlSession getSqlSession() {
        return sqlSession;
    }

    public void setSqlSession(SqlSession sqlSession) {
        this.sqlSession = sqlSession;
    }     
}

 

(2)使用SqlSessionDaoSupport方式:

package com.research.mybatis.spring;

import org.mybatis.spring.support.SqlSessionDaoSupport;
import org.springframework.stereotype.Repository;

import com.research.mybatis.generator.model.AgentInvokeGenerate;

@Repository
public class MybatisSpringDaoUseDaoSupport extends SqlSessionDaoSupport{

    public AgentInvokeGenerate getAgentInvokeById(String id){
        return getSqlSession().selectOne("com.research.mybatis.generator.dao.AgentInvokeGenerateMapper.selectByPrimaryKey", id);
    } 
}

 

(3)使用Mapper方式:

package com.research.mybatis.spring;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.research.mybatis.generator.dao.AgentInvokeGenerateMapper;
import com.research.mybatis.generator.model.AgentInvokeGenerate;

@Repository
public class MybatisSpringDaoUseMapper {

    @Autowired
    private AgentInvokeGenerateMapper mapper;
    
    public AgentInvokeGenerate getAgentInvokeById(String id){
        return mapper.selectByPrimaryKey(id);
    }
}

 

   相关实体类和Mapper类:

package com.research.mybatis.generator.model;

public class AgentInvokeGenerate {
    private String ID;

    private String dbFlag;

    private String STATUS;

    public String getID() {
        return ID;
    }

    public void setID(String ID) {
        this.ID = ID == null ? null : ID.trim();
    }

    public String getDbFlag() {
        return dbFlag;
    }

    public void setDbFlag(String dbFlag) {
        this.dbFlag = dbFlag == null ? null : dbFlag.trim();
    }

    public String getSTATUS() {
        return STATUS;
    }

    public void setSTATUS(String STATUS) {
        this.STATUS = STATUS == null ? null : STATUS.trim();
    }
}

 

package com.research.mybatis.generator.dao;

import com.research.mybatis.generator.model.AgentInvokeGenerate;

public interface AgentInvokeGenerateMapper {

    AgentInvokeGenerate selectByPrimaryKey(String ID);
}

 

具体测试类如下(使用TestNG):


(1)使用SqlSessionTemplate方式的测试类:

package com.research.mybatis.spring;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.testng.AbstractTestNGSpringContextTests;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.research.mybatis.generator.model.AgentInvokeGenerate;

@ContextConfiguration(locations="classpath:/generator/spring/spring-mybatis.xml")
public class MybatisSpringDaoUseTemplateTest extends AbstractTestNGSpringContextTests{

  @Autowired
  private MybatisSpringDaoUseTemplate dao;
    
  @Test
  public void getAgentInvokeById() {
    String id = "001";
    AgentInvokeGenerate ai = dao.getAgentInvokeById(id);
    Assert.assertTrue("000".equals(ai.getDbFlag()));
  }
}

 

(2)使用SqlSessionDaoSupport方式的测试类:

package com.research.mybatis.spring;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.testng.AbstractTestNGSpringContextTests;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.research.mybatis.generator.model.AgentInvokeGenerate;

@ContextConfiguration(locations="classpath:/generator/spring/spring-mybatis.xml")
public class MybatisSpringDaoUseDaoSupportTest extends AbstractTestNGSpringContextTests{

  @Autowired
  private MybatisSpringDaoUseDaoSupport dao;
    
  @Test
  public void getAgentInvokeById() {
    String id = "001";
    AgentInvokeGenerate ai = dao.getAgentInvokeById(id);
    Assert.assertTrue("000".equals(ai.getDbFlag()));
  }
}

 

(3)使用Mapper方式的测试类:

package com.research.mybatis.spring;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.testng.AbstractTestNGSpringContextTests;
import org.testng.Assert;
import org.testng.annotations.Test;

import com.research.mybatis.generator.model.AgentInvokeGenerate;

@ContextConfiguration(locations="classpath:/generator/spring/spring-mybatis.xml")
public class MybatisSpringDaoUseMapperTest extends AbstractTestNGSpringContextTests{

  @Autowired
  private MybatisSpringDaoUseMapper dao;
    
  @Test
  public void getAgentInvokeById() {
    String id = "001";
    AgentInvokeGenerate ai = dao.getAgentInvokeById(id);
    Assert.assertTrue("000".equals(ai.getDbFlag()));
  }
}

 

代码测试通过,若用博文中代码时需注意下文件和包路径是否正确,更多集成相关的细节参考官方帮助文档

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