java 如何将属性值注入到注释配置的 spring mvc 3.0 控制器中
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How can I inject a property value into an annotation configured spring mvc 3.0 controller
提问by l3dx
First: I'm using Spring 3.0
第一:我使用的是 Spring 3.0
I have a problem when configuring my controller class. The controller uses a web service which I want to define the endpoint address using a .properties file.
配置控制器类时遇到问题。控制器使用我想使用 .properties 文件定义端点地址的 Web 服务。
@Controller
public class SupportController {
@Value("#{url.webservice}")
private String wsEndpoint;
...
In my application context xml-file, I've defined this:
在我的应用程序上下文 xml 文件中,我定义了这个:
<context:property-placeholder location="/WEB-INF/*.properties" />
I've been reading the documentation, trying different approaches (like adding prefix systemProperties.),but I keep getting an error message telling me that it doesn't exist.
我一直在阅读文档,尝试不同的方法(例如添加前缀systemProperties.),但我不断收到一条错误消息,告诉我它不存在。
Field or property 'url' cannot be found on object of type 'org.springframework.beans.factory.config.BeanExpressionContext'
在“org.springframework.beans.factory.config.BeanExpressionContext”类型的对象上找不到字段或属性“url”
Ok. I've figured it out.
行。我已经想通了。
Now, in the controller:
现在,在控制器中:
@Value("#{settings['url.webservice']")
Then in the context configuration I have this "helper bean":
然后在上下文配置中,我有这个“helper bean”:
<util:properties id="settings"
location="/WEB-INF/supportweb.properties"></util:properties>
回答by GreyFairer
This should work, too:
这也应该有效:
@Value("${url.webservice}")
private String wsEndpoint;
回答by Enrico
I have this configuration and it works fine:
我有这个配置,它工作正常:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:application.properties</value>
</list>
</property>
</bean>
and I iniejct the property in this way
我以这种方式初始化财产
@Value("${root.log.level}")
private String prop;
the field is correctly initialized to "DEBUG" value.
该字段已正确初始化为“DEBUG”值。
回答by ykhrustalev
you should check that the
你应该检查一下
<context:property-placeholder location="/WEB-INF/*.properties" />
is defined in webmvc-config.xml where you create instances of the @Controllers
在 webmvc-config.xml 中定义,您可以在其中创建 @Controllers 的实例

