Spring 属性（属性占位符）自动装配
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Spring properties (property-placeholder) autowiring
提问by Piotr Gwiazda
I have in my applicationContext.xml
我在我的 applicationContext.xml
<context:property-placeholder location="classpath*:*.properties" />
<bean id="clientPreferencesManager" class="pl.bildpresse.bildchat2.business.ClientPreferencesManager" >
<property name="clientApiUrl" value="${clientapi.url}" />
</bean>
Is it possible to do the same by autowire ? Something like :
是否可以通过 autowire 做同样的事情？就像是 ：
@Autowired
@Qualifier("${clientapi.url}")
public void setClientApiUrl(String clientApiUrl) {
this.clientApiUrl = clientApiUrl;
}
回答by axtavt
You can use @Value:
您可以使用@Value：
@Value("${clientapi.url}")
public void setClientApiUrl(String clientApiUrl) {
this.clientApiUrl = clientApiUrl;
}
回答by Felix
It took me some time to understand why it didn't work. I always used a #instead of a $. I always got the message:
我花了一些时间才明白为什么它不起作用。我总是使用 a#而不是 a $。我总是收到消息：
EL1008E:(pos 0): Field or property 'secretkey' cannot be found on object of type 'org.springframework.beans.factory.config.BeanExpressionContext'
Just had to change it from:
只需要从：
@Value("#{secretkey}')
to
到
@Value('${secretkey}')
I hope this saves somebody's time.
我希望这可以节省某人的时间。
回答by Costa
Ok. Just got it. You need to add @Autowired Something like:
好的。刚拿到。您需要添加 @Autowired 类似的东西：
@Autowired
@Value("${clientapi.url}")
private StringValueResolver resolver;
I'm using spring 3.0.0.RELEASE
我正在使用 spring 3.0.0.RELEASE
Cheers
干杯
回答by Bozho
For spring 3.0, the correct way is the one shown - using @Value("${expression}")
对于 spring 3.0，正确的方法是显示的方法 - 使用 @Value("${expression}")
For spring pre-3.0, you can try:
对于 spring pre-3.0，您可以尝试：
@Autowired
private StringValueResolver resolver;
There were no context initialization problems here, but I'm not sure it will work. Using the resolver you can resolve properties.
这里没有上下文初始化问题，但我不确定它会起作用。使用解析器，您可以解析属性。
回答by Piotr Gwiazda
My solution is to use
我的解决方案是使用
<context:property-override location="classpath:clientapi.properties" />
and then in clientapi.propertiesfile
然后在clientapi.properties文件中
clientPreferencesManager.clientApiUrl=http://localhost:8084/ClientAPI/resources/
This one is good too
这个也不错
