发布于 2024-12-07 10:03:57 字数 8667 浏览 0 评论 0 原文 我正在使用 spring mvc 开发一个 Maven 项目。我在使用@value 访问properties () 时遇到问题。当我启动 tomcat 6 时，出现以下异常： 09:21:21.703 ERROR o.s.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'resultsDisplayController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private int foo.ResultsDisplayController.PAGE_SIZE; nested exception is org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 0): Field or property 'appProperties' cannot be found on object of type 'org.springframework.beans.factory.config.BeanExpressionContext' at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) ~[spring-beans-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) ~[spring-context-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) ~[spring-context-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276) ~[spring-web-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197) ~[spring-web-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) [spring-web-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3830) [catalina.jar:na] at org.apache.catalina.core.StandardContext.start(StandardContext.java:4337) [catalina.jar:na] at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) [catalina.jar:na] at org.apache.catalina.core.StandardHost.start(StandardHost.java:719) [catalina.jar:na] at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) [catalina.jar:na] at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) [catalina.jar:na] at org.apache.catalina.core.StandardService.start(StandardService.java:516) [catalina.jar:na] at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) [catalina.jar:na] at org.apache.catalina.startup.Catalina.start(Catalina.java:566) [catalina.jar:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_21] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_21] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_21] at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_21] at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) [bootstrap.jar:na] at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413) [bootstrap.jar:na] 这是我的 foo.resultsDisplayController @Controller @Transactional(readOnly = true) public class ResultsDisplayController { private static final Logger LOG = LoggerFactory.getLogger(ResultsDisplayController.class); @Value("#{appProperties.page_default_size}") private int PAGE_SIZE; @RequestMapping(value = "/show-results", method = RequestMethod.GET) public String displayVariousreults(Model model) { ... } } servlet-context.xml 的内容 <?xml version="1.0" encoding="UTF-8"?> <beans:beans xmlns="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:spring-configured /> <context:component-scan base-package="foo" /> <annotation-driven /> <tx:annotation-driven /> <!-- properties --> <util:properties id="appProperties" location="classpath:app.properties" /> <resources mapping="/resources/**" location="/resources/" /> <beans:bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver" /> <interceptors> <beans:bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"> <beans:property name="paramName" value="language" /> </beans:bean> </interceptors> <beans:bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"> <beans:property name="basenames"> <beans:list> <beans:value>classpath:labels</beans:value> </beans:list> </beans:property> <beans:property name="cacheSeconds" value="5" /> <beans:property name="defaultEncoding" value="UTF-8" /> <beans:property name="fallbackToSystemLocale" value="false" /> </beans:bean> <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <beans:property name="prefix" value="/WEB-INF/views/" /> <beans:property name="suffix" value=".jsp" /> </beans:bean> <beans:bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver"> <beans:property name="order" value="0" /> <beans:property name="mediaTypes"> <beans:map> <beans:entry key="json" value="application/json" /> <beans:entry key="xml" value="text/xml" /> </beans:map> </beans:property> <beans:property name="defaultContentType" value="application/json" /> </beans:bean> <beans:bean id="authenticationListener" class="foo.AuthenticationListener" /> </beans:beans> app.properties 的内容： page_default_size=10 编辑： 我发现问题与 eclipse wtp 有关。当我使用 eclipse 在 tomcat 上部署 web 应用程序时，出现问题。然而，当我独立于 eclipse 在另一台 tomcat 服务器上部署由 maven 发起的战争时，我没有遇到问题并且应用程序工作正常。问题是如何修复这个 eclipse wtp bug？ 原文 收藏 0 分享到微信 分享到QQ 分享到微博 如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

Answer 1

我会使用 然后使用 @Value("${property}")

Answer 2

“NumberFormatException”我认为它将值读取为字符串。也许您可以将 PAGE_SIZE 的类型更改为 String，然后将其转换为 int。