InvocationTargetException 异常
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TTP ERROR 500
Problem accessing /blog!add.do. Reason:
java.lang.reflect.InvocationTargetException
Caused by:
org.blog.common.web.ObjectFactoryException: java.lang.reflect.InvocationTargetException at org.blog.common.web.ControllerFactory.executeMethod(ControllerFactory.java:72) at org.blog.common.web.ControllerFactory.control(ControllerFactory.java:23) at org.blog.common.web.ControlServlet.process(ControlServlet.java:45) at org.blog.common.web.ControlServlet.doGet(ControlServlet.java:25) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:349) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100) at org.blog.common.web.ControllerFactory.executeMethod(ControllerFactory.java:66) ... 30 more Caused by: java.lang.IllegalStateException: The current user is not logged in. at com.google.appengine.api.users.UserServiceImpl.isUserAdmin(UserServiceImpl.java:96) at org.blog.common.web.Controller.checkAdmin(Controller.java:92) at org.blog.blog.web.BlogController.add(BlogController.java:23) ... 36 more
Caused by:
java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100) at org.blog.common.web.ControllerFactory.executeMethod(ControllerFactory.java:66) at org.blog.common.web.ControllerFactory.control(ControllerFactory.java:23) at org.blog.common.web.ControlServlet.process(ControlServlet.java:45) at org.blog.common.web.ControlServlet.doGet(ControlServlet.java:25) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:349) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: java.lang.IllegalStateException: The current user is not logged in. at com.google.appengine.api.users.UserServiceImpl.isUserAdmin(UserServiceImpl.java:96) at org.blog.common.web.Controller.checkAdmin(Controller.java:92) at org.blog.blog.web.BlogController.add(BlogController.java:23) ... 36 more
Caused by:
java.lang.IllegalStateException: The current user is not logged in. at com.google.appengine.api.users.UserServiceImpl.isUserAdmin(UserServiceImpl.java:96) at org.blog.common.web.Controller.checkAdmin(Controller.java:92) at org.blog.blog.web.BlogController.add(BlogController.java:23) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100) at org.blog.common.web.ControllerFactory.executeMethod(ControllerFactory.java:66) at org.blog.common.web.ControllerFactory.control(ControllerFactory.java:23) at org.blog.common.web.ControlServlet.process(ControlServlet.java:45) at org.blog.common.web.ControlServlet.doGet(ControlServlet.java:25) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:58) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:122) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:349) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
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戴威 回答于 2011-01-05 21:02/** * 执行方法 * @param obj * @param methodName * @throws RequestNotFoundException * @throws ObjectFactoryException */ private static void executeMethod(Object obj, String methodName) throws RequestNotFoundException, ObjectFactoryException { try { Method method = obj.getClass().getMethod(methodName); method.invoke(obj); } catch(NoSuchMethodException e) { throw new RequestNotFoundException( "无法找到方法：" + methodName, e); } catch(Exception e) { e.printStackTrace(); throw new ObjectFactoryException(e); } }执行method.invoke(obj);这句时报错 -
戴威 回答于 2011-01-05 21:04
/** * Invokes the underlying method represented by this <code>Method</code> * object, on the specified object with the specified parameters. * Individual parameters are automatically unwrapped to match * primitive formal parameters, and both primitive and reference * parameters are subject to method invocation conversions as * necessary. * * <p>If the underlying method is static, then the specified <code>obj</code> * argument is ignored. It may be null. * * <p>If the number of formal parameters required by the underlying method is * 0, the supplied <code>args</code> array may be of length 0 or null. * * <p>If the underlying method is an instance method, it is invoked * using dynamic method lookup as documented in The Java Language * Specification, Second Edition, section 15.12.4.4; in particular, * overriding based on the runtime type of the target object will occur. * * <p>If the underlying method is static, the class that declared * the method is initialized if it has not already been initialized. * * <p>If the method completes normally, the value it returns is * returned to the caller of invoke; if the value has a primitive * type, it is first appropriately wrapped in an object. However, * if the value has the type of an array of a primitive type, the * elements of the array are <i>not</i> wrapped in objects; in * other words, an array of primitive type is returned. If the * underlying method return type is void, the invocation returns * null. * * @param obj the object the underlying method is invoked from * @param args the arguments used for the method call * @return the result of dispatching the method represented by * this object on <code>obj</code> with parameters * <code>args</code> * * @exception IllegalAccessException if this <code>Method</code> object * enforces Java language access control and the underlying * method is inaccessible. * @exception IllegalArgumentException if the method is an * instance method and the specified object argument * is not an instance of the class or interface * declaring the underlying method (or of a subclass * or implementor thereof); if the number of actual * and formal parameters differ; if an unwrapping * conversion for primitive arguments fails; or if, * after possible unwrapping, a parameter value * cannot be converted to the corresponding formal * parameter type by a method invocation conversion. * @exception InvocationTargetException if the underlying method * throws an exception. * @exception NullPointerException if the specified object is null * and the method is an instance method. * @exception ExceptionInInitializerError if the initialization * provoked by this method fails. */ public Object invoke(Object obj, Object... args) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException { if (!override) { if (!Reflection.quickCheckMemberAccess(clazz, modifiers)) { Class caller = Reflection.getCallerClass(1); Class targetClass = ((obj == null || !Modifier.isProtected(modifiers)) ? clazz : obj.getClass()); boolean cached; synchronized (this) { cached = (securityCheckCache == caller) && (securityCheckTargetClassCache == targetClass); } if (!cached) { Reflection.ensureMemberAccess(caller, clazz, obj, modifiers); synchronized (this) { securityCheckCache = caller; securityCheckTargetClassCache = targetClass; } } } } if (methodAccessor == null) acquireMethodAccessor(); return methodAccessor.invoke(obj, args); }最深只能追踪到这句 return methodAccessor.invoke(obj, args);报错
在深入下去就是native的类了
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红薯 回答于 2011-01-05 21:07请看 http://www.oschina.net/code/snippet_12_1 这个类的第 103 行
捕捉到这个异常后要调用 .getCause() 方法才能获取真实的异常信息。
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戴威 回答于 2011-01-05 21:13
引用来自#5楼“红薯”的帖子
请看 http://www.oschina.net/code/snippet_12_1 这个类的第 103 行
捕捉到这个异常后要调用 .getCause() 方法才能获取真实的异常信息。
感谢红薯老大，原来是实反射的那个方法报错了。
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戴威 回答于 2011-01-05 21:15
/** * 执行方法 * @param obj * @param methodName * @throws RequestNotFoundException * @throws ObjectFactoryException */ private static void executeMethod(Object obj, String methodName) throws RequestNotFoundException, ObjectFactoryException { try { Method method = obj.getClass().getMethod(methodName); method.invoke(obj); } catch(NoSuchMethodException e) { throw new RequestNotFoundException( "无法找到方法：" + methodName, e); } catch(InvocationTargetException e) { Throwable t = e.getCause(); t.printStackTrace(); throw new ObjectFactoryException(t); } catch(Exception e) { e.printStackTrace(); throw new ObjectFactoryException(e); } }改造之后的代码，再次感谢红薯老大的帮助 -
