定义了一个二维字符串组
String[][] str=new String[map.size()][];
map.size()是上面的，在某次运行中为11
现在写了一个方法
String fangan;
String methodName;
String methodNamefinal = null;
ArrayList methodNameArray= new ArrayList();
ArrayList methodNameArray1= new ArrayList();
ArrayList methodNameArray2= new ArrayList();
String[][] str=new String[map.size()][];
for(int i=0;i<map.size();i++){
fangan=map.get(i).toString();
methodNameArray=(ArrayList<Object>) map.get(i);
for(int j=0;j<methodNameArray.size();j++){
//从methodNameArray.get(j)中截取中间字符
int aa=methodNameArray.get(j).toString().indexOf("methodName=");
int bb=methodNameArray.get(j).toString().indexOf(",methodType");
methodName=methodNameArray.get(j).toString().substring(aa+11,bb);
if(methodName!=null){
str[i][j]=methodName;
}
}
现在 str[i][j]=methodName; 这个出错了，不知道为什么、
出错如下。
你只对第一层的数组初始化了，没有对得二层的数组初始化
for (int i = 0; i < map.size(); i++) {
fangan = map.get(i).toString();
methodNameArray = (ArrayList) map.get(i);
str[i]=new String[methodNameArray.size()];
for (int j = 0; j < methodNameArray.size(); j++) {
//从methodNameArray.get(j)中截取中间字符
int aa = methodNameArray.get(j).toString().indexOf("methodName=");
int bb = methodNameArray.get(j).toString().indexOf(",methodType");
methodName = methodNameArray.get(j).toString().substring(aa + 11, bb);
if (methodName != null) {
str[i][j] = methodName;
}
}
}
加上这句 str[i]=new String[methodNameArray.size()];
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor127.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher$FinalJavassistMethodInterceptor.invoke(MethodInterceptorDispatcher.java:96)
at com.bstek.dorado.util.proxy.ChainedMethodInvocation.proceed(ChainedMethodInvocation.java:73)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher$FinalAopallianceMethodInterceptor.invoke(MethodInterceptorDispatcher.java:67)
at com.bstek.dorado.util.proxy.ChainedMethodInvocation.proceed(ChainedMethodInvocation.java:73)
at com.bstek.bdf2.core.exception.interceptor.AjaxMethodInterceptor.invoke(AjaxMethodInterceptor.java:23)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher.invoke(MethodInterceptorDispatcher.java:170)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher.invoke(MethodInterceptorDispatcher.java:241)
at com.bstek.dorado.view.resolver.ViewServiceInvoker_$$_javassist_72.invoke(ViewServiceInvoker_$$_javassist_72.java)
at com.bstek.dorado.view.resolver.ViewServiceResolver.processTask(ViewServiceResolver.java:151)
at com.bstek.dorado.view.resolver.ViewServiceResolver.execute(ViewServiceResolver.java:235)
at com.bstek.dorado.web.resolver.AbstractTextualResolver.doHandleRequest(AbstractTextualResolver.java:128)
at com.bstek.dorado.web.resolver.WebContextSupportedController.handleRequestInternal(WebContextSupportedController.java:72)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:154)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:108)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at com.bstek.bdf2.core.security.filter.ControllerFilter.doFilter(ControllerFilter.java:64)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:65)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at com.bstek.bdf2.core.security.filter.PreAuthenticatedProcessingFilter.doFilter(PreAuthenticatedProcessingFilter.java:41)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at com.bstek.bdf2.core.security.filter.ContextFilter.doFilter(ContextFilter.java:36)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:279)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.bstek.dorado.data.method.MethodAutoMatchingUtils.invokeMethod(MethodAutoMatchingUtils.java:602)
at com.bstek.dorado.data.method.MethodAutoMatchingUtils.invokeMethod(MethodAutoMatchingUtils.java:784)
at com.bstek.dorado.data.provider.manager.DataProviderInterceptorInvoker.invokeInterceptorByParamName(DataProviderInterceptorInvoker.java:401)
at com.bstek.dorado.data.provider.manager.DataProviderInterceptorInvoker.invoke(DataProviderInterceptorInvoker.java:135)
at com.bstek.dorado.util.proxy.ChainedMethodInvocation.proceed(ChainedMethodInvocation.java:73)
at com.bstek.dorado.data.provider.DataProviderGetResultMethodInterceptor.invokeGetResult(DataProviderGetResultMethodInterceptor.java:29)
at com.bstek.dorado.data.provider.AbstractDataProviderGetResultMethodInterceptor.invoke(AbstractDataProviderGetResultMethodInterceptor.java:55)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher.invoke(MethodInterceptorDispatcher.java:241)
at com.bstek.dorado.data.provider.DirectDataProvider_$$_javassist_69.getResult(DirectDataProvider_$$_javassist_69.java)
at com.bstek.dorado.view.service.LoadDataServiceProcessor.doExecute(LoadDataServiceProcessor.java:252)
at com.bstek.dorado.view.service.DataServiceProcessorSupport.execute(DataServiceProcessorSupport.java:131)
at com.bstek.dorado.view.resolver.ViewServiceInvoker.invoke(ViewServiceInvoker.java:30)
at com.bstek.dorado.view.resolver.ViewServiceInvoker_$$_javassist_72._d5invoke(ViewServiceInvoker_$$_javassist_72.java)
... 85 more
Caused by: java.lang.NullPointerException
at edu.buaa.cm.service.KnowledgeService.getfangan(KnowledgeService.java:505)
at edu.buaa.cm.service.KnowledgeService$$FastClassByCGLIB$$570c3b11.invoke()
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:713)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:646)
at edu.buaa.cm.service.KnowledgeService$$EnhancerByCGLIB$$5f697308.getfangan()
... 102 more
2017-07-14 15:30:06,080 ERROR (ViewServiceResolver.java:260) java.lang.Exception: 后台操作出错：
java.lang.Exception: 后台操作出错：
at com.bstek.bdf2.core.exception.interceptor.AjaxMethodInterceptor.invoke(AjaxMethodInterceptor.java:43)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher.invoke(MethodInterceptorDispatcher.java:170)
at com.bstek.dorado.util.proxy.MethodInterceptorDispatcher.invoke(MethodInterceptorDispatcher.java:241)
at com.bstek.dorado.view.resolver.ViewServiceInvoker_$$_javassist_72.invoke(ViewServiceInvoker_$$_javassist_72.java)
at com.bstek.dorado.view.resolver.ViewServiceResolver.processTask(ViewServiceResolver.java:151)
at com.bstek.dorado.view.resolver.ViewServiceResolver.execute(ViewServiceResolver.java:235)
at com.bstek.dorado.web.resolver.AbstractTextualResolver.doHandleRequest(AbstractTextualResolver.java:128)
at com.bstek.dorado.web.resolver.WebContextSupportedController.handleRequestInternal(WebContextSupportedController.java:72)
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:154)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:108)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at com.bstek.bdf2.core.security.filter.ControllerFilter.doFilter(ControllerFilter.java:64)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:146)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:65)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at com.bstek.bdf2.core.security.filter.PreAuthenticatedProcessingFilter.doFilter(PreAuthenticatedProcessingFilter.java:41)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at com.bstek.bdf2.core.security.filter.ContextFilter.doFilter(ContextFilter.java:36)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:279)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)