Struts的action自動裝配到spring

1、Struts 在與 Spring 整合是要實現(xiàn) Struts 的 action 自動裝配到 spring 容器中，我們經常遇到的問題是：java.lang.NullPointException 這個空指針異常，我碰到的有這么幾種解決方案：1.看一下你的 set 方法是否存在。2.是否在 web.xml 中配置了 “當 web 項目啟動的時候，讓 spring 掃描整個項目。 ”，當然也要加上一個名為：struts-spring-plugin*.jar的包，這個包實現(xiàn)了action裝配到 spring 的功能。（如果已經加了這個包，也配置了 web.xml 還出現(xiàn)空指針異常，那么可能是你的 st

2、ruts-spring-plugin*.jar 的版本不配套， 還幾個版本試試）web.xml 中添加的配置（添加在 Struts 配置的前面）：htmlview .springframework.web.context.ContextLoaderListener3.4.5.contextConfigLocation6.classpath:bean.xml7.當你已經完成上面描述的配置的時候，還可能出現(xiàn)下面的這個異常，異常信息如下（這個是瀏覽器報的異常，后臺沒有異常，服務器啟動正常）：plainview plaincopy1.Struts Problem Rep

3、ort2.3.Struts has detected an unhandled exception:4.5.Messages:6.Cannot convert value of type xy.$Proxy8 implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImpl

4、for property userServiceImpl: no matchi ngeditors or conversion strategy found7.Failed to convert property value of type xy.$Proxy8 implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised to required type com.zsq.wxssh.s

5、erviceimpl.UserServiceImpl for property userServiceImpl ;nested exception is java.lang.IllegalArgumentException: Cannot conv ertvalue of type xy.$Proxy8 implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised to required

6、 type com.zsq.wxssh.serviceimpl.UserServiceImpl for property userServiceImpl: no matchingeditors or conversion strategy found8.Unable to instantiate Action, com.zsq.wxssh.action.LoginAction, define d for Login in namespace /Failed toconvert property value of type xy.$Proxy8 implementingco

7、m.zsq.wxssh.service.UserService ,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImplfor property userServiceImpl; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type xy.$P

8、roxy8implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advisedype com.zsq.wxssh.serviceimpl.UserServiceImpl for property userServiceImpl: no matching editors or conversion strategy found9.File: org/springframework/beans/TypeConverter

9、Delegate.java10.Line number: 23111.Stacktraces12.13.Unable to instantiate Action, com.zsq.wxssh.action.LoginAction, define d for Login in namespace /Failed toconvert property value of type xy.$Proxy8 implementingcom.zsq.wxssh.service.UserService ,org.springframework.aop.SpringProxy,org.sp

10、ringframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImplfor property userServiceImpl; nested exception is java.lang.Illegalto required tArgumentException: Cannot convert value of type xy.$Proxy8implementing com.zsq.wxssh.service.UserService,org.spring

11、framework.aop.SpringProxy,org.springframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImpl for property userServiceImpl: no matching editors or conversion strategy .opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:316).opensymp

12、hony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:397).opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:194)17.org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)18.org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(S

13、trutsActionProxyFactory.java:39).opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)20.org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:553)21.org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:

14、77)22.org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)23.org.apache.catalina.core.ApplicationFilterCernalDoFilter(ApplicationFilterChain.java:235)24.org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilter

15、Chain.java:206)25.org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)26.org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)27.org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)28.org.apache.catalina.valves.Err

16、orReportValve.invoke(ErrorReportValve.java:103)29.org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)30.org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)31.org.apache.coyote.http11.Http11AprPcess(Http11AprProcessor.java:879)32.org.a

17、pache.coyote.http11.Http11AprProtocol$Http11ConnectionHcess(Http11AprProtocol.java:600).AprEndpoint$Worker.run(AprEndpoint.java :1703)34.java.lang.Thread.run(Thread.java:724)35.36.org.springframework.beans.TypeMismatchException: Failed to convert property value of type xy.$Proxy

18、8 implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImpl for property userServiceImpl; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type

19、 xy.$Proxy8 implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImpl forproperty userServiceImpl: no matching editors or conversion strategy .springfra

20、mework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:391)38.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1289)39.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.app

21、lyPropertyValues(AbstractAutowireCapableBeanFactory.java:1250)40.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010)41.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperti

22、es(AbstractAutowireCapableBeanFactory.java:329).opensymphony.xwork2.spring.SpringObjectFactory.autoWireBean(SpringObjectFactory.java:203).opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:183).opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactor

23、y.java:154).opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:151).opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:121).opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:297).opensymphony.xwork2.DefaultActionInvocation.init(DefaultAct

24、ionInvocation.java:397).opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:194)50.org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)51.org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39).opensymphony.xwork

25、2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)53.org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:553)54.org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)55.org.apache.struts2.dispatcher.ng.filter.Strut

26、sPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)56.org.apache.catalina.core.ApplicationFilterCernalDoFilter(ApplicationFilterChain.java:235)57.org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)58.org.apache.catalina.core.Standard

27、WrapperValve.invoke(StandardWrapperValve.java:233)59.org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)60.org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)61.org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)62.o

28、rg.apache.catalina.core.StandardEngineValve.invoke(StandardE.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)64.org.apache.coyote.http11.Http11AprPcess(Http11AprProcessor.java:879)65.org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHc

29、ess(Http11AprProtocol.java:600).AprEndpoint$Worker.run(AprEndpoint.java :1703)67.java.lang.Thread.run(Thread.java:724)68.69.java.lang.IllegalArgumentException: Cannot convert value of type xy.$Proxy8 implementing com.zsq.wxssh.service.UserService,org.springframework.aop.SpringProxy,org.sp

30、ringframework.aop.framework.Advised to required type com.zsq.wxssh.serviceimpl.UserServiceImpl for p ropertyuserServiceImpl: no matching editors or conversion strategy .springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:231)71.org.springframework.bea

31、ns.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:138)72.org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:386)73.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.ja

32、va:1289)74.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1250)75.org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010)76.org.sp

33、ringframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:329).opensymphony.xwork2.spring.SpringObjectFactory.autoWireBean(SpringObjectFactory.java:203).opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFa

34、ctory.java:183).opensymphony.xwork2.spring.SpringObjectFactory.buildBean(SpringObjectFactory.java:154).opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:151).opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:121).opensymphony.xwork2.DefaultActionInvocation.createAction(De

35、faultActionInvocation.java:297).opensymphony.xwork2.DefaultActionInvocation.init(DefaultA.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:194)85.org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:63)86.org.apache.struts2.impl.StrutsActionProxyFactory.crea

36、teActionProxy(StrutsActionProxyFactory.java:39).opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)88.org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:553)89.org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteO

37、perations.java:77)90.org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)91.org.apache.catalina.core.ApplicationFilterCernalDoFilter(ApplicationFilterChain.java:235)92.org.apache.catalina.core.ApplicationFilterChain.doFilter(Ap

38、plicationFilterChain.java:206)93.org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)94.org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)95.org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)96.org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportV