spring 框架的xml文件如何读取properties文件数据

spring 框架的xml文件如何读取properties文件数据

第一步：在spring配置文件中

注意：value可以多配置几个properties文件

<bean id="propertyConfigurer"

class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<property name="locations">

<list>

<value>/db.properties</value>

</list>

</property>

</bean>

第二步：

在src目录下面建立db.properties文件

user=sa

password=sa

driver=com.microsoft.sqlserver.jdbc.SQLServerDriver

url=jdbc:sqlserver://localhost:1433;databaseName=DB1

第三步：

在spring的配置文件中通过EL表达式的形式调用

${user}

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="propertyConfigurer"

class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

<property name="locations">

<list>

<value>/db.properties</value>

</list>

</property>

</bean>

<bean id="datasource"

class="org.springframework.jdbc.datasource.DriverManagerDataSource">

<property name="driverClassName"

value="${driver}">

</property>

<property name="url"

value="${url}">

</property>

<property name="username" value="${user}"></property>

<property name="password" value="${password}"></property>

</bean>

<bean id="sessionFactory"

class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<property name="dataSource">

<ref bean="datasource" />

</property>

<property name="hibernateProperties">

<props>

<prop key="hibernate.dialect">

org.hibernate.dialect.SQLServerDialect

</prop>

</props>

</property>

<property name="mappingResources">

<list>

<value>entity/Users.hbm.xml</value>

</list>

</property>

</bean>

<bean id="UsersDAO" class="dao.UsersDAO">

<property name="sessionFactory">

<ref bean="sessionFactory" />

</property>

</bean>

</beans>