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Java Spring PropertyPlaceHolderConfigure问题以加载属性文件

java spring

Java Spring PropertyPlaceHolderConfigure问题以加载属性文件,java,spring,Java,Spring,我试图使用一个外部属性文件来填充Spring应用程序上下文配置文件中的一些bean。当我不使用${}属性并硬编码下面的jpaVendorAdapter类属性时，我可以看到该文件已加载到日志文件中。如果您依赖于属性文件并使用class=“${jpa.vendor.adapter}”表示法，那么对于在类路径资源[spring/applicationContext.xml]中定义的名为“jpaVendorAdapter”的bean，我将无法找到类[${jpa.vendor.adapter}]；例外。文

我试图使用一个外部属性文件来填充Spring应用程序上下文配置文件中的一些bean。当我不使用${}属性并硬编码下面的jpaVendorAdapter类属性时，我可以看到该文件已加载到日志文件中。如果您依赖于属性文件并使用class=“${jpa.vendor.adapter}”表示法，那么对于在类路径资源[spring/applicationContext.xml]中定义的名为“jpaVendorAdapter”的bean，我将无法找到类[${jpa.vendor.adapter}]；例外。文件在运行时明确地位于类路径上，它看起来就像是在需要后加载的。我也尝试过使用
方法，但得到了相同的异常。我使用的是Spring版本3.2.2.RELEASE，有什么想法吗

ApplicationContext.xml 

类路径：runtime/project.properties
project.properties 例外情况
尝试将
propertyplaceholderconfigure
bean声明替换为
以上内容不能与
类
属性一起使用

相反，您可以实现一个生成类类型的
我相信Spring会自动调用这个bean上的
getObject（）
，并将返回的对象添加到上下文中。我相信
example
将是生成的bean（而不是工厂）的名称。

试试这个Spring配置：


classpath*：project.properties
我想加载多个文件，根据web应用程序所在的环境，它将基于jvm参数加载文件，并重载基本属性文件。这就是为什么我想使用PropertyPlaceHolderConfigure并最终向其传递属性文件列表的原因。不过我首先要把它准备好一个文件，这与Maven无关。Maven是一个构建系统。如果您想在运行时执行某些操作，可能需要查看Spring的
配置文件
。我稍微更改了标题，您是对的，这不是maven的问题，而是Spring的问题。@c12请尝试使用
上下文：属性占位符
声明。我尝试了这两种方法，但两种方法的引用都出现了相同的异常，请参阅此处的第4.7.2节：对不起，错误警报，我没有完全测试它。它仍然抛出相同的exceptionclasspath://**/project.properties？@bellabax-使用此方法，似乎在加载属性文件之前读入了${jpa.vendor.adapter}。如果我删除${jpa.vendor.adapter}并对其进行硬编码，我可以在日志中看到已加载属性文件。我不能尝试自己，只能将id添加到ppholder bean，并依赖于ppholder的？

jpa.vendor.adapter=org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter



org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [${jpa.vendor.adapter}] for bean with name 'jpaVendorAdapter' defined in class path resource [spring/applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: ${jpa.vendor.adapter}
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1269) ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:578) ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1338) ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:356) [spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:327) [spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:435) [spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:624) [spring-context-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461) [spring-context-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) [spring-web-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.jboss.resteasy.plugins.spring.SpringContextLoaderListener.contextInitialized(SpringContextLoaderListener.java:44) [resteasy-spring-2.3.5.Final.jar:na]
    at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:740) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:238) [jetty-servlet-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1238) [jetty-webapp-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:683) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:480) [jetty-webapp-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.mortbay.jetty.plugin.JettyWebAppContext.doStart(JettyWebAppContext.java:256) [jetty-maven-plugin-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) [jetty-util-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.server.handler.HandlerCollection.doStart(HandlerCollection.java:229) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:172) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) [jetty-util-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.server.handler.HandlerCollection.doStart(HandlerCollection.java:229) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) [jetty-util-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.server.Server.doStart(Server.java:275) [jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.mortbay.jetty.plugin.JettyServer.doStart(JettyServer.java:65) [jetty-maven-plugin-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64) [jetty-util-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:511) [jetty-maven-plugin-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:364) [jetty-maven-plugin-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.mortbay.jetty.plugin.JettyRunMojo.execute(JettyRunMojo.java:521) [jetty-maven-plugin-7.6.8.v20121106.jar:7.6.8.v20121106]
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156) [maven-core-3.0.3.jar:3.0.3]
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537) [maven-embedder-3.0.3.jar:3.0.3]
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196) [maven-embedder-3.0.3.jar:3.0.3]
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141) [maven-embedder-3.0.3.jar:3.0.3]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_51]
    at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_51]
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) [plexus-classworlds-2.4.jar:na]
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) [plexus-classworlds-2.4.jar:na]
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) [plexus-classworlds-2.4.jar:na]
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) [plexus-classworlds-2.4.jar:na]
Caused by: java.lang.ClassNotFoundException: ${jpa.vendor.adapter}
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) ~[na:na]
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) ~[na:na]
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) ~[na:na]
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:430) ~[na:na]
    at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:383) ~[na:na]
    at org.springframework.util.ClassUtils.forName(ClassUtils.java:260) ~[spring-core-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:416) ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1290) ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1261) ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
    ... 51 common frames omitted