1、查看不同MyBatis版本整合Spring时使用的适配包； http://www.mybatis.org/spring/
2、下载整合适配包
https://github.com/mybatis/spring/releases
• 3、官方整合示例，jpetstore
https://github.com/mybatis/jpetstore-6

Mybatis整合Spring包
mybatis-spring-1.3.2.jar

1.整合Mybatis和Spring配置

结构

1.1 类

com.tangge.bean.employee.java

package com.tangge.bean;import java.io.Serializable;public class employee implements Serializable{private int id;private String lastName;private String email;private String  gender;private deptment dept;public employee() {}public employee(int id, String lastName, String email, String gender) {this.id = id;this.lastName = lastName;this.email = email;this.gender = gender;}public employee(String lastName, String email, String gender) {this.lastName = lastName;this.email = email;this.gender = gender;}public deptment getDept() {return dept;}public void setDept(deptment dept) {this.dept = dept;}@Overridepublic String toString() {return "employee{" +"id=" + id +", lastName='" + lastName + '\'' +", email='" + email + '\'' +", gender=" + gender +", dept=" + dept +'}';}public int getId() {return id;}public String getLastName() {return lastName;}public String getEmail() {return email;}public String getGender() {return gender;}public void setLastName(String lastName) {this.lastName = lastName;}public void setEmail(String email) {this.email = email;}public void setGender(String gender) {this.gender = gender;}}

1.2 接口

com.tangge.dao.employeeMapper.java

public interface employeeMapper {public List<employee> getEmployees();
}

1.3 服务层

com.tangge.service.employeeService.java

package com.tangge.service;import com.tangge.dao.employeeMapper;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.tangge.bean.employee;@Service
public class employeeService {@Autowiredprivate employeeMapper employeeMapper;public List<employee> getemps(){return employeeMapper.getEmployees();}
}

1.4 mapper 配置XML

employeeMapper.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,指定为接口的全类名
-->
<mapper namespace="com.tangge.dao.employeeMapper"><!--<cache type="org.mybatis.caches.ehcache.EhcacheCache"/>--><select id="getEmployees" resultType="com.tangge.bean.employee">select `id`,  `last_name`  lastName,  `gender`,  `email` from tbl_employee</select>
</mapper>

1.5 mybatis 简单配置 XML

mybatis-config.xml 只留下setting等一些简单配置

<?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><setting name="logImpl" value="LOG4J"/><setting name="jdbcTypeForNull" value="NULL"/><!--显示指定每个我们需要更改的值，即使他是默认的。防止版本更迭带来的问题--><setting name="lazyLoadingEnabled" value="true"/><setting name="aggressiveLazyLoading" value="false"/><!--<setting name="mapUnderscoreToCamelCase" value="true"></setting>--></settings><databaseIdProvider type="DB_VENDOR"><property name="SQL Server" value="sqlserver"/><property name="MySQL" value="mysql"/><property name="DB2" value="db2"/><property name="Oracle" value="oracle"/></databaseIdProvider></configuration>

1.6 * 最重要的spring配置

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:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsdhttp://mybatis.org/schema/mybatis-springhttp://mybatis.org/schema/mybatis-spring.xsd"><!--指定Spring希望控制所有业务逻辑组件：扫描包--><context:component-scan base-package="com.tangge"></context:component-scan><!--Spring控制业务逻辑。数据源。事务控制。AOP--><!--（1）数据源：   引用外部文件db.properties --><context:property-placeholder location="classpath:tangge/db.properties"/><!--配置jdbc--><bean id="datasource" class="org.apache.commons.dbcp2.BasicDataSource"><property name="driverClassName" value="${drivername}"></property><property name="url" value="${url}"></property><property name="username" value="${user}"></property><property name="password" value="${pass}"></property></bean><!--事务管理--><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="datasource"></property></bean><!--启用事务注解 http://www.springframework.org/schema/tx--><!--http://www.springframework.org/schema/tx/spring-tx.xsd--><tx:annotation-driven transaction-manager="transactionManager"/><!--（2）整合mybatis目的：1.spring管理所有组件，mapper的实现类2.spring管理事务，spring声明式事务--><!--（2.1）创建 SqlSessionFactory--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="datasource"/><!--全局配置文件位置--><property name="configLocation" value="classpath:tangge/mybatis-config.xml"></property><!--指定 mapper 文件位置--><property name="mapperLocations" value="classpath:tangge/mapper/*.xml"></property></bean><!--（2.2）扫描所有mapper,自动注入base-package:指定包下所有的mapper接口实现自动扫描并加入到ioc容器中--><!--<mybatis-spring:scan base-package="com.tangge.dao" />--><!--第2个写法--><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.tangge.dao" /></bean></beans>

---->【测试】：

public class SpringTest {public static void main(String[] args) {SpringTest test = new SpringTest();test.getFirstLevelCache();}public void getFirstLevelCache() {ApplicationContext applicationContext =new ClassPathXmlApplicationContext("classpath:tangge/applicationContext.xml");employeeService  service = applicationContext.getBean(employeeService.class);List<employee> list = service.getemps();System.out.println(list);}}

2.对应关系图

3.问题

java.lang.NoClassDefFoundError: org.springframework.beans.FatalBeanException

一：jar包未加载完整。

二：Eclipse/idea 运行JVM内存过小，调整JVM内存。

解决：
Eclipse：
在Window->Preferences中，选择Java->Installed JREs，修改已配置的JDK。

配置Default VM arguments即可。

-Xmx512M -Xms512M -XX:MaxPermSize=256M-Xss512K
https://blog.csdn.net/u013355724/article/details/52222463

IDEA：
idea.exe.vmoptions
idea64.exe.vmoptions
修改1024，两个