我在WEB-INF/local.db.properties
处有一个简单的属性文件:
db.driverClassName=org.postgresql.Driver
db.url=jdbc:postgresql://localhost:5432/db_name
db.username=postgres
db.password=password
我正在尝试访问Spring配置文件中的这些属性(到最后):
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="controllers" />
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles3.TilesConfigurer">
<property name="definitions">
<list>
<value>/WEB-INF/tiles-config.xml</value>
</list>
</property>
</bean>
<bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.tiles3.TilesView"/>
</bean>
<util:properties id="dbProperties" location="WEB-INF/local.db.properties" />
<bean id="dbDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${db.driverClassName}" /> <!--ERROR -->
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
</bean>
</beans>
错误为Could not load JDBC driver class [${db.driverClassName}]
。错误对我来说非常清楚 - 它不是试图查找它只是使用原始字符串的属性。
我该如何解决这个问题?
这是Maven 3,Spring 4,Postgresql项目。
答案 0 :(得分:3)
您未在Spring配置中加载属性文件。添加以下行:
<context:property-placeholder location="classpath:/WEB-INF/local.db.properties"/>
或
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="/WEB-INF/local.db.properties"/>
</bean>
如果您有多个属性文件,请更改以上配置:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<!-- locations, not location, check the S at the end -->
<property name="locations">
<list>
<value>
/WEB-INF/local.db.properties
</value>
<value>
<!-- Path of another properties file -->
</value>
</list>
</property>
</bean>
答案 1 :(得分:-1)
如果您使用的是Eclipse,请尝试右键单击项目 - &gt;属性 - &gt; Java构建路径 - &gt;源,然后将文件夹或链接源添加到您的属性文件。