spring和mybatis的整合配置

参考自：

http://www.cnblogs.com/wangmingshun/p/5674633.html

链接中的文章里一共有三种整合方式，太多了怕记混了。

我这里只保留第二种。

spring中引入properties文件至少有以下两种方式：

a.

<!-- 引入db.properties -->
<context:property-placeholder location="classpath:db.properties" />

b.

<!-- 引入properties文件 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location" value="classpath:jdbc.properties" />
</bean>

我觉得还是第一种比较更简单一些。

 2、采用接口org.apache.ibatis.session.SqlSession的实现类org.mybatis.spring.SqlSessionTemplate。
　　mybatis中, sessionFactory可由SqlSessionFactoryBuilder.来创建。MyBatis-Spring 中，使用了SqlSessionFactoryBean来替代。SqlSessionFactoryBean有一个必须属性dataSource，另外其还有一个通用属性configLocation（用来指定mybatis的xml配置文件路径）。
spring-mybatis.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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd  
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描 -->
    <context:component-scan base-package="com.hua.saf" />
    <!-- 引入properties文件 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties" />
    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${driver}" />
        <property name="url" value="${url}" />
        <property name="username" value="${username}" />
        <property name="password" value="${password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}" />
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}" />
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}" />
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}" />
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}" />
    </bean>

    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation"  value="classpath:sqlMapConfig.xml"/>
        <!-- 自动扫描mapping.xml文件，**表示迭代查找,也可在sqlMapConfig.xml中单独指定xml文件-->
        <property name="mapperLocations" value="classpath:com/hua/saf/**/*.xml" />
    </bean>
    
    <!-- mybatis spring sqlSessionTemplate,使用时直接让spring注入即可 -->
    <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
    </bean>

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
</beans>

sqlMapConfig.xml

<?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 type="com.hua.saf.pojo.User" alias="User" />
    </typeAliases>
</configuration>

User.java

public class User {
    
    private int id;
    private String username;
    private String password;
    private int age;
     
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}

UserDao.java

@Repository
public class UserDao{

    @Resource
    private SqlSessionTemplate sqlSessionTemplate;
    
    public User getUser(int id) {
        return sqlSessionTemplate.selectOne(this.getClass().getName() + ".getUser", 1);
    }   
}

UserService.java

@Service
public class UserService{
    
    @Resource
    private UserDao userDao;
    
    public User getUser(int id) {
        return userDao.getUser(id);
    }
}