SpringMVC 使用 @Value获取properties文件中的属性值


我的项目目录结构

test

----- java

--------- com.test

---------------Proporties.java

---------------Test.java

-----resource

--------- applicationContext.xml

--------- application.properties

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application.properties内容

jdbc.code = "this is a code"

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Proporties.java 源码

package com.test;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class Proporties {

@Value("#{configProperties['jdbc.code']}")
private String code;

public String getCode() {
return code;
}

public void setCode(String code) {
this.code = code;
}

}

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applicationContext.xml 配置

<!-- 获取properties中的值 -->
<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="locations">
<list>
<value>classpath:application.properties</value>
</list>
</property>
</bean>

<!-- Spring的动态变量,能在bean中直接调用 -->
<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="properties" ref="configProperties" />
</bean>

<!-- 使用Annotation自动注册Bean ,扫描 Component-->
<context:component-scan base-package="com.test" use-default-filters="false"><!-- base-package 如果多个，用“,”分隔 -->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Component"/>
</context:component-scan>

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Test.java 源码

@ContextConfiguration(locations = { "classpath:applicationContext.xml" })
@RunWith(SpringJUnit4ClassRunner.class
public class Test{

@Antowird
private Proporties proporties;

@Test
public void testProperties(){

System.out.println("获取的值为:" + proporties.getCode());
}
}