Question

我需要在战争之外访问属性文件。我正在通往外面的财产

文件在类路径属性文件中。项目版本为 Spring 2.5.1 和

不幸的是，

@Configuration和Environemnt类不可用。

System.properties 位于类路径中，它具有对外部属性的键入口。

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

我试过以下方法

            <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;

我需要将这个值注入bean中，如下所示。

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

我收到错误无法在字符串值“$ {keyValue}”中解析占位符'keyValue'

我也试过

<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，期待。

完整代码 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();


}

感谢。不幸的是它仍然无法解决。线程“main”中的异常org.springframework.beans.factory.BeanInitializationException：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）在org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory（PropertyResourceConfigurer.java:78）在org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors（AbstractApplicationContext.java:542）在org.springframework.context.support.AbstractApplicationContexeBeanFactoryPostProcessors（AbstractApplicationContext.java:516）在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:348）在org.springframework.context.support.ClassPathXmlApplicationContext。（ClassPathXmlApplicationContext.java:123）在org.springframework.context.support.ClassPathXmlApplicationContext.t.invok

Answer 1

删除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>

访问war-Spring 2.5.1版本之外的属性文件

1 个答案: