使用jackson实例化XmlMapper类时报错，jar包没问题

Question

java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.5.0_21]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.5.0_21]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.5.0_21]
at java.lang.reflect.Method.invoke(Method.java:592) ~[na:1.5.0_21]
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:450) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:289) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:252) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256) ~[struts2-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:239) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73) ~[struts2-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91) ~[struts2-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252) ~[struts2-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:161) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) ~[struts2-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246) ~[xwork-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54) ~[struts2-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:563) ~[Dispatcher.class:na]
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) [struts2-core-2.3.15.1.jar:2.3.15.1]
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99) [struts2-core-2.3.15.1.jar:2.3.15.1]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at ins.framework.web.CompressFilter.doFilter(CompressFilter.java:87) [ins-arch4-4.2.5.jar:na]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) [spring-2.5.2.jar:2.5.2]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75) [spring-2.5.2.jar:2.5.2]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at com.picc.aop.log.tool.RequestFilter.doFilter(RequestFilter.java:34) [log-aop-tool-1.0.3.jar:na]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at com.picc.aop.log.tool.RequestFilter.doFilter(RequestFilter.java:34) [log-aop-tool-1.0.3.jar:na]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at com.sinosoft.common.filter.SessionFilter.doFilter(SessionFilter.java:46) [SessionFilter.class:na]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96) [spring-2.5.2.jar:2.5.2]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75) [spring-2.5.2.jar:2.5.2]
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) [weblogic.jar:9.2.3.0]
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3242) [weblogic.jar:9.2.3.0]
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) [weblogic.jar:9.2.3.0]
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) [weblogic.jar:9.2.3.0]
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2010) [weblogic.jar:9.2.3.0]
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1916) [weblogic.jar:9.2.3.0]
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1366) [weblogic.jar:9.2.3.0]
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) [weblogic.jar:9.2.3.0]
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181) [weblogic.jar:9.2.3.0]
Caused by: java.lang.NoClassDefFoundError: null
at com.sinosoft.prpins.policy.web.PolicyAction.prepareProposalQuery(PolicyAction.java:2037) ~[PolicyAction.class:na]
... 72 common frames omitted

Answer 1

alert(111)