直接上配置文件
<?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://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- 配置spring掃描的包 -->
<context:component-scan base-package="com.future.hist">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
<context:exclude-filter type="annotation"
expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan>
<!-- 引入外部資源文件 -->
<context:property-placeholder location="classpath:db.properties" />
<!-- 配置數據源,整合其他框架 -->
<!-- 使用的數據源是 :DriverManagerDataSource -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="user" value="${user}"></property>
<property name="password" value="${password}"></property>
<property name="jdbcUrl" value="${jdbcUrl}"></property>
<property name="driverClass" value="${driverClass}"></property>
<property name="maxPoolSize" value="50"></property>
<property name="minPoolSize" value="10"></property>
<property name="initialPoolSize" value="10"></property>
<property name="maxIdleTime" value="25000"></property>
<property name="acquireIncrement" value="1"></property>
<property name="acquireRetryAttempts" value="30"></property>
<property name="acquireRetryDelay" value="1000"></property>
<property name="testConnectionOnCheckin" value="true"></property>
<property name="idleConnectionTestPeriod" value="18000"></property>
<property name="checkoutTimeout" value="5000"></property>
<property name="automaticTestTable" value="t_c3p0"></property>
</bean>
<!-- 2. mybatis的SqlSession的工廠: SqlSessionFactoryBean dataSource : 引用數據源
/ typeAliasesPackage : 指定實體類的包名,自動將實體類簡單類名映射成爲別名 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="typeAliasesPackage" value="com.future.hist.domain"></property>
</bean>
<!-- 3. mybatis自動掃描加載Sql映射文件 : MapperScannerConfigurer sqlSessionFactory / basePackage : 指定sql映射文件/接口所在的包(自動掃描) -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.future.hist.persistence"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- 4. 事務管理 : DataSourceTransactionManager -->
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 5. 使用聲明式事務 -->
<tx:annotation-driven transaction-manager="txManager" />
</beans>
db.propertis文件
user = root
password = root
jdbcUrl = jdbc:mysql:///oa?useUnicode=true&characterEncoding=UTF-8
driverClass = com.mysql.jdbc.Driver
這樣加載配置文件時總是失敗,後來網上搜了好長時間,但是都不對,今天一個偶然的機會搜到了,說的是在配置第3步自動掃描加載sql映射文件時必須將sqlSessionFactory換成sqlSessionFactoryBeanName,ref改成value纔可以將文件加載上去。
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.future.hist.persistence"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
這樣做是因爲sqlSessionFactory是老版本的spring。它是是數據源的工廠類引用,這樣初始化mybatis時,屬性文件的值還沒被替換,就開始構造這個sqlSessionFactory類了,所以導致屬性值加載失敗。而sqlSessionFactoryBeanName沒有直接注入sqlSessionFactory,而是等spring初始化完成後,再構造該類。