可以达到与两MethodInvokingFactoryBeans
组合创建访问System.getProperties和调用的putAll由内部bean获取的属性的外豆内部豆:
<bean
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property
name="targetObject">
<!-- System.getProperties() -->
<bean
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetClass" value="java.lang.System" />
<property name="targetMethod" value="getProperties" />
</bean>
</property>
<property
name="targetMethod"
value="putAll" />
<property
name="arguments">
<!-- The new Properties -->
<util:properties>
<prop
key="my.key">myvalue</prop>
<prop
key="my.key2">myvalue2</prop>
<prop
key="my.key3">myvalue3</prop>
</util:properties>
</property>
</bean>
(你当然可以使用一个bean和目标System.setProperties(),但是你会替换现有的属性,这不是一个好主意。
无论如何,这里是我的小测试方法:
public static void main(final String[] args) {
new ClassPathXmlApplicationContext("classpath:beans.xml");
System.out.println("my.key: "+System.getProperty("my.key"));
System.out.println("my.key2: "+System.getProperty("my.key2"));
System.out.println("my.key3: "+System.getProperty("my.key3"));
// to test that we're not overwriting existing properties
System.out.println("java.io.tmpdir: "+System.getProperty("java.io.tmpdir"));
}
而这里的输出:
my.key: myvalue
my.key2: myvalue2
my.key3: myvalue3
java.io.tmpdir: C:\DOKUME~1\SEANFL~1\LOKALE~1\Temp\
相关问题与另外的答案:http://stackoverflow.com/questions/11306951/how-to-set-environment-variable-or-system-property -in-spring-tests/41305482 – anre 2016-12-23 17:51:35