<?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"
xsi
:schemaLocation="http
://www.springframework.org/schema/beans
http
://www.springframework.org/schema/beans/spring
-beans.xsd
http
://www.springframework.org/schema/
context
https
://www.springframework.org/schema/
context/spring
-context.xsd
http
://www.springframework.org/schema/tx
http
://www.springframework.org/schema/tx/spring
-tx.xsd">
<!
-- 缩小扫描范围到 com.itheima.
SpringMVC -->
<
context:component
-scan base
-package="com.itheima.
SpringMVC"/>
<bean id="User" class="com.itheima.
SpringMVC.pojo.User">
<
property name="username" value="涂大钧"></
property>
<
property name="password" value="123"></
property>
</bean>
<!
--数据源
-->
<
context:property-placeholder location="classpath*
:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<
property name="driverClassName" value="${jdbc.driver}"/>
<
property name="url" value="${jdbc.url}"></
property>
<
property name="username" value="${jdbc.username}"/>
<
property name="password" value="${jdbc.password}"/>
</bean>
<!
--配置sql
-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<
property name="dataSource" ref="dataSource"></
property>
<!
--别名扫包
-->
<
property name="typeAliasesPackage" value="com.itheima.
SpringMVC.pojo"></
property>
<!
--指定XML文件位置
-->
<!
--mybatis
-config.xml
-->
<
property name="configLocation" value="classpath
:/mybatis
-mvc
-config.xml" />
</bean>
<!
--指定Mapper XML文件位置
-->
<!
--扫描Mapper
-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<
property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></
property>
<
property name="basePackage" value="com.itheima.
SpringMVC.Mapper"></
property>
</bean>
<!
-- 事务管理器
-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<
property name="dataSource" ref="dataSource"></
property>
</bean>
<!
--开启注解驱动的事务管理
-->
<tx
:annotation
-driven transaction
-manager="transactionManager"></tx
:annotation
-driven>
</beans><?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>
<!
-- 引入外部配置文件
-->
<properties resource="jdbc.properties">
<!
-- 可以在这里添加默认属性值
-->
</properties>
<!
-- 设置 MyBatis 核心配置
-->
<settings>
<!
-- 开启驼峰命名自动映射，如将数据库字段 user_name 映射到 Java 属性 userName
-->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!
-- 开启二级缓存
-->
<setting name="cacheEnabled" value="true"/>
<!
-- 开启延迟加载
-->
<setting name="lazyLoadingEnabled" value="true"/>
<!
-- 开启 aggressiveLazyLoading 会导致所有关联对象在被访问时立即加载
-->
<setting name="aggressiveLazyLoading" value="true"/>
<!
-- 配置日志实现
-->
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!
-- 配置类型别名，简化映射
-->
<typeAliases>
<package name="com.itheima.
SpringMVC.pojo"/>
</typeAliases>
<!
-- 配置插件
-->
<plugins>
<!
-- PageHelper 分页插件
-->
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<!
-- 可选配置
-->
<
property name="reasonable" value="true"/>
<
property name="supportMethodsArguments" value="true"/>
<
property name="params" value="count=countSql"/>
</plugin>
</plugins>
<!
-- 配置数据库环境
-->
<environments default="development">
<environment id="development">
<!
-- 使用 JDBC 事务管理器
-->
<transactionManager type="JDBC"/>
<!
-- 配置数据源，使用 POOLED 连接池
-->
<dataSource type="POOLED">
<
property name="driver" value="${jdbc.driver}"/>
<
property name="url" value="${jdbc.url}"/>
<
property name="username" value="${jdbc.username}"/>
<
property name="password" value="${jdbc.password}"/>
<!
-- 可选配置：连接池参数
-->
<
property name="poolMaximumActiveConnections" value="10"/>
<
property name="poolMaximumIdleConnections" value="5"/>
</dataSource>
</environment>
</environments>
<!
-- 注册映射器
-->
<mappers>
<package name="com.itheima.
SpringMVC.Mapper" />
<!
-- <mapper resource="
SpringMVC/Mapper/UsersMapper.xml"/>
-->
<!
-- <mapper resource="
SpringMVC/Mapper/UserMapper.xml"/>
-->
<!
-- <mapper resource="
SpringMVC/Mapper/IdCardMapper.xml"/>
-->
<!
-- <mapper resource="
SpringMVC/Mapper/GoodsMapper.xml"/>
-->
<!
-- <mapper resource="
SpringMVC/Mapper/GoodsTypeMapper.xml"/>
-->
<!
-- <mapper resource="
SpringMVC/Mapper/OrdersMapper.xml"/>
-->
<!
-- <mapper resource="
SpringMVC/Mapper/OrderItemsMapper.xml"/>
-->
</mappers>
</configuration>有问题吗
本文介绍了如何在Spring MVC框架中使用property-placeholder标签来加载.properties配置文件，并在Bean定义中通过${}
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