How to start myBatis implemention with spring? - spring

Question

I want to work with myBatis. I have read MyBatis-3-user-guide. Now i am trying to implement it. Recently i have learned spring. So it is difficult for me to implement it. So i need some helpful resource by which i can implement it step by step.

Answer 1

Add the MyBatis-Spring jar in your class path at first
Start with your spring context file.In your context file add following lines
<beans:bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource"
p:driverClassName="yourDriverClassName"
p:url="yourUrl"
p:username="yourUsername"
p:password="yourPassword" />
<beans:bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="configLocation" value="/WEB-INF/mybatis-config.xml" />
</beans:bean>
<beans:bean id="userDao" class="com.yourcomp.dao.Userdao">
<beans:property name="sqlSessionFactory" ref="sqlSessionFactory" />
</beans:bean>
your mybatis-config.xml should be something like this:
<?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>
</settings>
<typeAliases>
<typeAlias alias="User" type ="com.yourcomp.domain.User" />
</typeAliases>
<mappers>
<mapper resource="com/yourcomp/domain/UserMapper.xml"/>
<mapper resource="com/yourcomp/domain/AnotherDomainObjectMapper.xml"/>
</mappers>
</configuration>
and your userMapper.xml in src/com/yourcomp/domain/ might be something like this
<?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="org.pbl.rms.RMSUserDao">-->
<mapper namespace="com.yourcomp.domain.User">
<resultMap id="userMap" type="User">
<id property="userId" column="USER_ID" javaType="int" jdbcType="NUMERIC"/>
<result property="userName" column="USER_NAME" javaType="String" jdbcType="VARCHAR"/>
<result property="userFullName" column="USER_FULL_NAME" javaType="String" jdbcType="VARCHAR"/>
<result property="password" column="PASSWORD" javaType="String" jdbcType="VARCHAR"/>
<result property="passwordExpiryDate" column="PASWRD_EXPIRY_DATE" javaType="java.util.Date" jdbcType="DATE"/>
<result property="status" column="STATUS" javaType="_integer" jdbcType="DECIMAL"/>
</resultMap>
<select id="getUserById" parameterType="map" resultMap="userMap">
select * from user where USER_ID=#{userId}
</select>
</mapper>
now in your DAO layer you might have class like follows:
public class UserDAO{
private SqlSessionFactory sqlSessionFactory;
public UserDAO() {
}
public UserDAO(SqlSessionFactory sqlSessionFactory ) {
this.sqlSessionFactory = sqlSessionFactory;
}
public String getUserById(Integer userId) {
SqlSession session = sqlSessionFactory.openSession();
String name=null;
try {
name = (String)session.selectOne("com.yourcomp.domain.User.getUserById",userId);
}catch(Exception e){
}finally {
session.close();
}
return name;
}
}

Answer 2

You need MyBatis-Spring for this . See the reference here and here These provide you the step by step configs . If you need any specific details , you need to re frame your query .
Also check the spring reference for IBatis support.