如果我在页面中使用了以下代码,那么我没有获得Illegalstate异常。
ConfigurableApplicationContext context = new ClassPathXmlApplicationContext("application-context.xml");
StudentService studentService = context.getBean(StudentService.class);
如果我用过
@SpringBean
private StudentService studentService;
我收到了以下异常
java.lang.IllegalStateException: bean of type [org.jeyam.samson.consumer.service.StudentService] not found
at org.apache.wicket.spring.injection.annot.AnnotProxyFieldValueFactory.getBeanNameOfClass(AnnotProxyFieldValueFactory.java:236)
at org.apache.wicket.spring.injection.annot.AnnotProxyFieldValueFactory.getBeanName(AnnotProxyFieldValueFactory.java:179)
at org.apache.wicket.spring.injection.annot.AnnotProxyFieldValueFactory.getFieldValue(AnnotProxyFieldValueFactory.java:113)
at org.apache.wicket.injection.Injector.inject(Injector.java:111)
at org.apache.wicket.spring.injection.annot.SpringComponentInjector.inject(SpringComponentInjector.java:124)
at org.apache.wicket.spring.injection.annot.SpringComponentInjector.onInstantiation(SpringComponentInjector.java:130)
at org.apache.wicket.application.ComponentInstantiationListenerCollection$1.notify(ComponentInstantiationListenerCollection.java:38)
at org.apache.wicket.application.ComponentInstantiationListenerCollection$1.notify(ComponentInstantiationListenerCollection.java:34)
at org.apache.wicket.util.listener.ListenerCollection.notify(ListenerCollection.java:80)
at org.apache.wicket.application.ComponentInstantiationListenerCollection.onInstantiation(ComponentInstantiationListenerCollection.java:33)
at org.apache.wicket.Component.<init>(Component.java:683)
at org.apache.wicket.MarkupContainer.<init>(MarkupContainer.java:121)
at org.apache.wicket.Page.<init>(Page.java:168)
at org.apache.wicket.Page.<init>(Page.java:157)
at org.apache.wicket.markup.html.WebPage.<init>(WebPage.java:106)
at org.jeyam.samson.consumer.page.HomePage.<init>(HomePage.java:28)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:171)
at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:76)
at org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:133)
at org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:268)
at org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
at org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:269)
at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1332)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:477)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
at org.eclipse.jetty.server.Server.handle(Server.java:348)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:884)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:938)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:630)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538)
at java.lang.Thread.run(Thread.java:724)
Complete stack:
org.apache.wicket.WicketRuntimeException: Can't instantiate page using constructor 'public org.jeyam.samson.consumer.page.HomePage(org.apache.wicket.request.mapper.parameter.PageParameters)' and argument ''. An exception has been thrown during construction!
at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:194)
at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:76)
at org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:133)
at org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:268)
at org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
at org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:269)
at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:171)
at org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:76)
at org.apache.wicket.DefaultMapperContext.newPageInstance(DefaultMapperContext.java:133)
at org.apache.wicket.core.request.handler.PageProvider.resolvePageInstance(PageProvider.java:268)
at org.apache.wicket.core.request.handler.PageProvider.getPageInstance(PageProvider.java:166)
at org.apache.wicket.request.handler.render.PageRenderer.getPage(PageRenderer.java:78)
at org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:269)
at org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:165)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
我在网络应用中使用了以下依赖项。
对于wicket = wickte-core,wicket-ioc和wicket-spring(版本-6.10.0)
对于spring = spring-data-mongodb(1.2.1-RELEASE),spring-web和spring-context-support(3.1.4-RELEASE)
javax.inject(版本-1)
Student service class
@Repository
@Named
public class StudentService
{
create(Student student)
{
....
}
}
应用程序context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- Activate annotation configured components -->
<context:annotation-config/>
<!-- Scan components for annotations within the configured package -->
<context:component-scan base-package="org.jeyam.samson.consumer">
<context:exclude-filter type="annotation" expression="org.springframework.context.annotation.Configuration"/>
</context:component-scan>
....
</beans>
WicketApplication.java
init()
{
.....
getComponentInstantiationListeners().add(new SpringComponentInjector(this, getSpringContext()));
}
public ApplicationContext getSpringContext()
{
return WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
}
Web.xml中
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>myapp</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
.......
......
</web-app>
我从服务类中删除了@Named注释。并使用@Autowired而不是@SpringBean。 我得到了NullPointerException
java.lang.NullPointerException
at org.jeyam.samson.consumer.page.HomePage$1.onSubmit(HomePage.java:64)
at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1253)
at org.apache.wicket.markup.html.form.Form.process(Form.java:925)
at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:771)
at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:704)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:240)
at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:226)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1332)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:477)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
at org.eclipse.jetty.server.Server.handle(Server.java:348)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538)
at java.lang.Thread.run(Thread.java:724)
Complete stack:
org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of interface org.apache.wicket.markup.html.form.IFormSubmitListener targeted at [Form [Component id = form]] on component [Form [Component id = form]] threw an exception
at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:268)
at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:240)
at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:226)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216)
at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:240)
at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:226)
at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:861)
at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
答案 0 :(得分:0)
看起来你的StudentService类不在你的spring configs组件扫描包中匹配的包中 - 它必须在org.jeyam.samson.consumer中。*
答案 1 :(得分:0)
您可以尝试在applicationContext.xml
中添加以下内容<bean id="StudentService" class="org.jeyam.samson.consumer.service.StudentService">
答案 2 :(得分:0)
奇怪的是,第一种情况有效。您正在使用@Named
注释,这是Java EE注释实现(春天还不支持)。删除@Named
注释。 @Repository
是弹簧注释。并将@SpringBean
替换为@Autowired
答案 3 :(得分:0)
在packeage org.springframework.stereotype.Service的StudentServiceImple中声明@Service