最近我将Spring Web应用程序升级到Java 8，并将一些表达式替换为lambda格式。
离）
for (int i : integerList) { ... }
到
integerList.forEach((i) -> { ... })
它编译没有错误但是当我尝试在Tomcat上安装应用程序时，我得到如下错误：
17:25:12.358 [localhost-startStop-1] ERROR o.s.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [com/ium/concerto/config/ConcertoRepositoryConfig.class]: Invocation of init method failed; nested exception is java.lang.RuntimeException: error trying to scan <jar-file>: file:/Users/daehee/projects/ium-concerto/target/classes/
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) ~[spring-beans-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973) ~[spring-context-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:750) ~[spring-context-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.__refresh(AbstractApplicationContext.java:482) ~[spring-context-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java) ~[spring-context-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) ~[spring-web-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) ~[spring-web-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.0.3.RELEASE.jar:4.0.3.RELEASE]
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4971) [catalina.jar:7.0.53]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467) [catalina.jar:7.0.53]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:7.0.53]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) [catalina.jar:7.0.53]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) [catalina.jar:7.0.53]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0]
at java.lang.Thread.run(Thread.java:744) [na:1.8.0]
将lambda表达式更改为旧式循环后，错误将停止弹出。
我目前正在使用Java 8（Java 1.8），Spring Framework 4，Hibernate 3.6.9.Final和最新版本的Tomcat 7（7.0.53）。当然，Tomcat的运行时环境是Java 8。