如何配置Spring bean容器来加载Java属性文件？ [英] How do you configure a Spring bean container to load a Java property file?

问题描述

如何配置Spring bean容器（或应用程序上下文）来加载Java属性文件？

How do you configure a Spring bean container (or application context) to load a Java property file?

JavaWorld 文章 智能加载属性 说明如何使用标准Java库中的以下资源处理方法之一从类路径加载属性文件：

JavaWorld article Smartly Load Your Properties explains how to load property files from the classpath using one of the following resource processing methods in the standard Java library:

ClassLoader.getResourceAsStream ("some/pkg/resource.properties");
Class.getResourceAsStream ("/some/pkg/resource.properties");
ResourceBundle.getBundle ("some.pkg.resource");

如何使用Spring bean容器执行相同操作？

How can you do the same using a Spring bean container?

推荐答案

Spring Framework Reference Documentation（2.5.x）提供了两个如何将属性文件加载到bean容器中的示例，一个在版本发布之前2.5和使用版本2.5中引入的< util：properties /> 函数的更简洁的方法：

The Spring Framework Reference Documentation (2.5.x) gives two examples of how to load a property file into a bean container, one before the release of version 2.5 and a more concise way using the <util:properties/> function that was introduced in version 2.5:

2.5版之前：

<!-- creates a java.util.Properties instance with values loaded from the supplied location -->
<bean id="jdbcConfiguration" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
  <property name="location" value="classpath:com/foo/jdbc-production.properties"/>
</bean>

版本2.5之后：

<!-- creates a java.util.Properties instance with values loaded from the supplied location -->
<util:properties id="jdbcConfiguration" location="classpath:com/foo/jdbc-production.properties"/>

请注意，为了使用< util：properties /> ，您必须在Spring XML配置文件顶部的前导码中声明 util 命名空间和架构位置：

Note that in order to use <util:properties/>, you must declare the util namespace and schema location in the preamble at the top of your Spring XML configuration file:

<?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:util="http://www.springframework.org/schema/util"
       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">

<!-- <bean/> definitions here -->

</beans>

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