spring和mybatis整合01

1.项目结构图

2.config/配置文件

config/mybatis/SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration><!-- 别名定义 --><typeAliases><!-- 针对单个别名定义type：类型的路径alias：别名 -->    <!-- <typeAlias type="com.app.mybatis.po.User" alias="user"/> --><!-- 批量别名定义 指定包名，mybatis自动扫描包中的po类，自动定义别名，别名就是类名（首字母大写或小写都可以）--><package name="com.app.ssm.po"/></typeAliases><!-- 加载映射文件 --><mappers><mapper resource="sqlmap/User.xml" /><!-- <mapper resource="mapper/UserMapper.xml" /> --><!-- <mapper class="com.app.mybatis.mapper.UserMapper" /> --><package name="com.app.ssm.mapper" /></mappers></configuration>

config/spring/applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "><!-- 加载配置文件 --><context:property-placeholder location="classpath:db.properties" /><!-- 数据源，使用dbcp(dibromochloropropane)；数据库连接池 --><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close"><property name="driverClassName" value="${jdbc.driver}" /><property name="url" value="${jdbc.url}" /><property name="username" value="${jdbc.username}" /><property name="password" value="${jdbc.password}" /><property name="maxActive" value="10" /><property name="maxIdle" value="5" /></bean><!-- sqlSessinFactory --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 加载mybatis的配置文件 --><property name="configLocation" value="mybatis/SqlMapConfig.xml" /><!-- 数据源 --><property name="dataSource" ref="dataSource" /></bean><!-- 原始dao接口 --><bean id="userDao" class="com.app.ssm.dao.impl.UserDaoImpl"><property name="sqlSessionFactory" ref="sqlSessionFactory"/></bean></beans>

config/sqlmap/User.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><!-- namespace命名空间，作用就是对sql进行分类化管理，理解sql隔离 注意：使用mapper代理方法开发，namespace有特殊重要的作用--><mapper namespace="test"><!-- R  根据id查询一条记录结果 --><select id="findUserById" parameterType="int" resultType="com.app.ssm.po.User">SELECT * FROM USER WHERE id=#{value}</select></mapper>

3.src/ssm包

dao包--接口

public interface UserDao {// R  根据id查询用户信息public User findUserById(int id) throws Exception;}

dao.impl包--实现

public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {@Overridepublic User findUserById(int id) throws Exception {SqlSession sqlSession = this.getSqlSession();User user = sqlSession.selectOne("test.findUserById", id);return user;}}

po包

4.test单元测试

public class UserDaoImplTest {private ApplicationContext applicationContext;@Beforepublic void setUp() throws Exception {applicationContext = new ClassPathXmlApplicationContext("classpath:spring/applicationContext.xml");}@Testpublic void testFindUserById() throws Exception {UserDao userDao = (UserDao) applicationContext.getBean("userDao");User user = userDao.findUserById(1);System.out.println(user);}}

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