at java.lang.Class.newInstance0(Class.java:320)
at java.lang.Class.newInstance(Class.java:308)
at com.wbpt.action.BaseAction.fillBean(BaseAction.java:101)
at com.wbpt.action.SysAction.login(SysAction.java:52)
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 org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at com.wbpt.action.BaseAction.execute(BaseAction.java:42)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
java.lang.RuntimeException: <???????????>statementNamesysusers.getCountByCodeAndPWDparameterObjectnull
at com.wbpt.services.BaseService.getObject(BaseService.java:154)
at com.wbpt.action.SysAction.login(SysAction.java:54)
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 org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at com.wbpt.action.BaseAction.execute(BaseAction.java:42)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in com/wbpt/sqlmap/sysusers.xml.
--- The error occurred while preparing the mapped statement for execution.
--- Check the sysusers.getCountByCodeAndPWD.
--- Check the parameter map.
--- Cause: com.ibatis.common.exception.NestedRuntimeException: Error getting properties of 'null'. Cause: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
Caused by: com.ibatis.common.exception.NestedRuntimeException: Error getting properties of 'null'. Cause: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:188)
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForObject(GeneralStatement.java:104)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:561)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:536)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:93)
at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:70)
at com.wbpt.services.BaseService.getObject(BaseService.java:151)
... 26 more
Caused by: com.ibatis.common.exception.NestedRuntimeException: Error getting properties of 'null'. Cause: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
at com.ibatis.sqlmap.engine.accessplan.PropertyAccessPlan.getProperties(PropertyAccessPlan.java:67)
at com.ibatis.sqlmap.engine.exchange.JavaBeanDataExchange.getData(JavaBeanDataExchange.java:91)
at com.ibatis.sqlmap.engine.mapping.parameter.BasicParameterMap.getParameterObjectValues(BasicParameterMap.java:132)
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:165)
... 32 more
Caused by: java.lang.NullPointerException
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.ibatis.sqlmap.engine.accessplan.PropertyAccessPlan.getProperties(PropertyAccessPlan.java:61)
... 35 more
定时查询数据库
6 个解决方案
#1
newInstance里面的参数为空。
#2
是的 ，这是怎么回事了？bean = (T) beanClass.newInstance();和 bean = (T) beanClass.getClass().newInstance()；有什么区别了？
#3
看看反射的知识
#4
通过构造器创建实例
#5
反射。。。
#6
应该是先获取字节码，这是反射的知识，你应该先去看看这部分知识
#1
newInstance里面的参数为空。
#2
是的 ，这是怎么回事了？bean = (T) beanClass.newInstance();和 bean = (T) beanClass.getClass().newInstance()；有什么区别了？
#3
看看反射的知识
#4
通过构造器创建实例
#5
反射。。。
#6
应该是先获取字节码，这是反射的知识，你应该先去看看这部分知识