MyBatis与Spring整合

一,基于XML

实体：

public class Bank implements Serializable {
    private String card_code;       //卡号
    private String user_name;       //所属人姓名
    private double card_balance;    //卡内余额

dao层：

public interface IBankDao {
    public List<Bank> getAllBank();
}

<?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">
<!--小配置根节点 namespace代表命名空间-->
<mapper namespace="cn.spring.dao.IBankDao">
    <select id="getAllBank" resultType="cn.spring.entity.Bank">
        select * from bank
    </select>
</mapper>

 service层：

public interface IBankService {
    public List<Bank> getAllBank();
}

package cn.spring.service.impl;

import cn.spring.dao.IBankDao;
import cn.spring.entity.Bank;
import cn.spring.service.IBankService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;
@Service("iBankService")
public class IBankServiceImpl implements IBankService {

    @Resource
    private IBankDao iBankDao;

    @Override
    public List<Bank> getAllBank() {
        return iBankDao.getAllBank();
    }

}

 配置文件:

    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--配置SqlSessionFactoryBean-->
    <bean id="SqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--加载Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--扫描Dao层，省略代码-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.spring.dao"/>
    </bean>
    <!--注入Dao层-->
    <bean id="iBankDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="mapperInterface" value="cn.spring.dao.IBankDao"/>
        <property name="sqlSessionFactory" ref="sqlSessionFactoryBean"/>
    </bean>
    <!–Service层–>
    <bean id="iBankService" class="cn.spring.service.impl.IBankServiceImpl">
        <property name="iBankDao" ref="iBankDao"/>

　　

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/bank?useUniCode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123

<?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>
    <!--配置别名-->
    <typeAliases>
        <package name="cn.spring.entity"/>
    </typeAliases>
    <!--加载小配置文件-->
    <mappers>
        <package name="cn.spring.dao"/>
    </mappers>
</configuration>

　　测试：

package cn.spring;

import cn.spring.entity.Bank;
import cn.spring.service.IBankService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

public class SpringMybatisTest {
    public static void main(String[] args) {
        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        IBankService iBankService = (IBankService)ctx.getBean("iBankService");

        List<Bank> allBank = iBankService.getAllBank();
        for(Bank bank:allBank){
            System.out.println(bank.getUser_name());
        }
    }

}

 二,基于注解

  配置文件：

<!--扫描注解-->
    <context:component-scan base-package="cn.spring"/>
    <!--加载配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--配置SqlSessionFactoryBean-->
    <bean id="SqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--加载Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--扫描Dao层，省略代码-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.spring.dao"/>
    </bean>

dao层：

public interface IBankDao {
    public List<Bank> getAllBank();
}

 service层：

@Service("iBankService")
public class IBankServiceImpl implements IBankService {

    @Resource
    private IBankDao iBankDao;

    @Override
    public List<Bank> getAllBank() {
        return iBankDao.getAllBank();
    }

}

<?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">
<!--小配置根节点 namespace代表命名空间-->
<mapper namespace="cn.spring.dao.IBankDao">
    <select id="getAllBank" resultType="cn.spring.entity.Bank">
select * from bank
    </select>
</mapper>