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我需要在战争之外访问一个属性文件。我正在保持通往外部财产的道路

类路径属性文件中的文件。项目版本是Spring 2.5.1和

不幸的是，@Configuration 和 Environemnt 类不可用。

System.properties位于类路径中，它具有外部属性的键入口。

key.externalFile=C:\temp\external.properties

我尝试了以下方法

            <context:property-placeholder location="classpath:System.properties"/>
            <context:property-placeholder location="file:${key.externalFile}" />

在external.properties文件中，它有 id

        keyValue= 444;

我需要将此值注入到 bean 中，如下所示。

        <bean id="helloWorldBean"   class="com.java.snippets.enterprise.services.HelloWorld">
<property name="key" value="${keyValue} />

我收到错误无法解析字符串值“$ {keyValue}”中的占位符“keyValue”

我也试过了

<context:property-placeholder location="file:${key.supportiveFile}" />  

 <util:properties id="props" location="file:${key.supportiveFile}"/>

但它以相同的结果结束。

<bean id="helloWorldBean"
    class="com.java.snippets.enterprise.services.HelloWorld">
     <property name="key" value="${props.keypath}" />
</bean>

请帮助我并期待。

完成代码 1. 上下文文件

      <beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
      xmlns:util="http://www.springframework.org/schema/util"
  xmlns:aop="http://www.springframework.org/schema/aop"  
      xmlns:tx="http://www.springframework.org/schema/tx"
  xmlns:jee="http://www.springframework.org/schema/jee"  
      xmlns:context="http://www.springframework.org/schema/context"
      xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd 
    ">

 <context:property-placeholder location="classpath:constants.properties"/>
 <context:property-placeholder location="file:${key.supportiveFile}"/>   
    <bean id="helloWorldBean"
    class="com.java.snippets.enterprise.services.HelloWorld">
     <property name="key" value="${keypath}" />
 </bean>
   </beans>

2. System property file - constants.properties
key.supportiveFile=C\:\\Users\\Kasun\\AppData\\Local\\Temp\\key.properties

3. Test Class 

    public static void main(String[] args) {

ApplicationContext context = new   
    ClassPathXmlApplicationContext("applicationContext.xml");           
        HelloWorld hello = (HelloWorld) context.getBean("helloWorldBean");          
        hello.sayHello();


}

谢谢。不幸的是，它仍然无法解决。线程“主”org.springframework.beans.factory.BeanInitializationException 中的异常：无法加载属性；嵌套异常是 java.io.FileNotFoundException: ${key.externalFile} (系统找不到指定的文件) at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:78) at org.springframework。 context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:542) at org.springframework.context.support.AbstractApplicationContexeBeanFactoryPostProcessors(AbstractApplicationContext.java:516) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:348)在 org.springframework.context.support。

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1 回答 1

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移除 propertyPlaceholderConfigurer 的上下文属性定义，并将其替换为：

    <bean id="placeholderConfig1" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location">
            <value>classpath:System.properties</value>
        </property>
        <property name="ignoreUnresolvablePlaceholders">
            <value>true</value>
        </property>
        <property name="systemPropertiesModeName">
            <value>SYSTEM_PROPERTIES_MODE_OVERRIDE</value>
        </property>
    </bean>

    <bean id="placeholderConfig2" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 
        <property name="location">
            <value>file:${key.externalFile}</value>
        </property>
    </bean>
于 2014-04-21T02:11:08.687 回答