myBatis中的莫名其妙的java.lang.NullPointerException,求指教

xml:

<!-- ognl访问静态方法的表达式 为@class@method(args),以下为调用Ognl.isNotEmpty()方法,还有其它方法如isNotBlank()可以使用,具体请查看Ognl类 -->



AND SRLNO = '${h_srlno}'


AND URGEDATE = '${h_date}'

    </where>
</sql>
<select id="findBySrlnoDate" parameterType="java.util.HashMap" resultType="com.mf.cntrtmng.entity.BsnsOverdueUrge">
    SELECT 
        <include refid="selectId" />
        FROM bsns_overdue_urge 
        <include refid="querywheresrlnodate"/>
</select>

DAO:
public BsnsOverdueUrge findBySrlnoDate(Map params) throws DataAccessException;

Serviceimpl:
public boolean exist(Map params) {
System.out.println("=====搜索出来的");
System.out.println(params);
if(bsnsOverdueUrgeDao.findBySrlnoDate(params)==null)
return true;
else
return false;
}

错误日志:
=====搜索出来的
{h_srlno=JH201505281535107052, h_date=20150601}
2015-06-01 15:19:42,922 DEBUG http-bio-8080-exec-3 - Creating a new SqlSession
2015-06-01 15:19:42,922 DEBUG http-bio-8080-exec-3 - Registering transaction synchronization for SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b]
2015-06-01 15:19:42,924 DEBUG http-bio-8080-exec-3 - JDBC Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver] will be managed by Spring
2015-06-01 15:19:42,925 DEBUG http-bio-8080-exec-3 - ooo Using Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver]
2015-06-01 15:19:42,928 DEBUG http-bio-8080-exec-3 - ==> Preparing: select count(1) from (SELECT NO, SRLNO, CLNTNO, URGEID, URGENAME, URGEDATE FROM bsns_overdue_urge WHERE SRLNO = 'JH201505281535107052' AND URGEDATE = '20150601') tmp_count
2015-06-01 15:19:42,929 DEBUG http-bio-8080-exec-3 - ==> Parameters:
2015-06-01 15:19:42,930 DEBUG http-bio-8080-exec-3 - Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b]
2015-06-01 15:19:42,930 DEBUG http-bio-8080-exec-3 - Initiating transaction rollback
2015-06-01 15:19:42,931 DEBUG http-bio-8080-exec-3 - Rolling back JDBC transaction on Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver]
2015-06-01 15:19:42,932 DEBUG http-bio-8080-exec-3 - Transaction synchronization rolling back SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b]
2015-06-01 15:19:42,932 DEBUG http-bio-8080-exec-3 - Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b]
2015-06-01 15:19:42,933 DEBUG http-bio-8080-exec-3 - Releasing JDBC Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver] after transaction
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

Error querying database. Cause: java.lang.NullPointerException

The error may exist in file [E:\SpringSource.metadata.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\microfinance20150203\WEB-INF\classes\com\mf\cntrtmng\entity\mapper\bsnsoverdueurge-mapper.xml]

The error may involve com.mf.cntrtmng.dao.BsnsOverdueUrgeDao.findBySrlnoDate-Inline

The error occurred while setting parameters

Cause: java.lang.NullPointerException

2015-06-01 15:19:42,933 DEBUG http-bio-8080-exec-3 - Returning JDBC Connection to DataSource
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:365)
at com.sun.proxy.$Proxy11.selectOne(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:160)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:43)
at com.sun.proxy.$Proxy114.findBySrlnoDate(Unknown Source)
at com.mf.cntrtmng.service.impl.BsnsOverdueUrgeServiceImpl.exist(BsnsOverdueUrgeServiceImpl.java:128)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy115.exist(Unknown Source)
at com.mf.aftrmng.controller.LoanWarnController.showUrgeInfo(LoanWarnController.java:310)
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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at com.mf.interceptor.HeadInterceptor.doFilter(HeadInterceptor.java:43)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)

从日志里面打印的SQL,可以在数据库中搜索,怎么返回值变成了count(),我不是在xml中配置的返回值类型为一个对象类型么“resultType="com.mf.cntrtmng.entity.BsnsOverdueUrge"?”然后包了莫名其妙的空指针错误,求大神帮忙看看,小弟感激不尽~~

3个回答


FROM bsns_overdue_urge
这两个引用的sql也贴下

yllcxsj
yllcxsj <include refid="selectId" /> FROM bsns_overdue_urge <include refid="querywheresrlnodate"/>
接近 5 年之前 回复

sql里的字段与实体类里要对应,大小写也要注意

去掉拦截器就可以访问

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com.xintujiuzhang.aimanagement.controller.MainController.login(java.lang.String,java.lang.String,java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.851 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/main],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.MainController.jumpmain(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.852 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/authority/menu_management],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.MenuManagementController.jumpMM(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.852 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/log/module_browsing],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.ModuleBrowsingController.jumpTM(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.852 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/log/module_operation],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.ModuleOperationController.jumpMM(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.852 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/deletehandwriting],methods=[POST]}" onto public void com.xintujiuzhang.aimanagement.controller.NotesController.deletehandwriting(java.lang.String) 2019-08-05 10:29:20.852 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/updatehandwriting],methods=[POST]}" onto public void com.xintujiuzhang.aimanagement.controller.NotesController.updatehandwriting(com.xintujiuzhang.aimanagement.pojo.Handwriting) 2019-08-05 10:29:20.852 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/addhandwriting],methods=[POST]}" onto public void com.xintujiuzhang.aimanagement.controller.NotesController.addhandwriting(com.xintujiuzhang.aimanagement.pojo.Handwriting) 2019-08-05 10:29:20.853 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/querynotes],methods=[GET]}" onto public com.xintujiuzhang.aimanagement.pojo.Handwriting com.xintujiuzhang.aimanagement.controller.NotesController.querynotes(java.lang.String) 2019-08-05 10:29:20.853 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/authority/parameter_settings],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.parameterSettingsController.jumpPS(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.853 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/authority/role_authorization],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.RoleAuthorizationController.jumpRA(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.853 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/log/service_call],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.ServiceCallController.jumpRA(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.853 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/authority/task_management],methods=[GET]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.TaskManagementController.jumpTM(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.854 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/authority/user_management]}" onto public java.lang.String com.xintujiuzhang.aimanagement.controller.UserController.jnmpUM(java.util.Map<java.lang.String, java.lang.Object>) 2019-08-05 10:29:20.854 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/queryUserInterface],methods=[GET]}" onto public java.util.Map<java.lang.String, java.lang.Object> com.xintujiuzhang.aimanagement.controller.UserInterfaceController.queryLicense(java.lang.String,java.lang.String,java.lang.Integer,java.util.Date) 2019-08-05 10:29:20.854 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/queryVersionCheckingInterface],methods=[GET]}" onto public java.util.Map<java.lang.String, java.lang.Object> com.xintujiuzhang.aimanagement.controller.VersionCheckingInterfaceController.queryVersionChecking(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.Integer,java.util.Date) 2019-08-05 10:29:20.854 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/queryVersionupdateInterface],methods=[GET]}" onto public java.util.Map<java.lang.String, java.lang.Object> com.xintujiuzhang.aimanagement.controller.VersionUpdateInterfaceController.queryVersionupdate(java.lang.String,java.lang.String,java.lang.String,java.util.Date) 2019-08-05 10:29:20.857 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2019-08-05 10:29:20.857 INFO 7416 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2019-08-05 10:29:20.881 INFO 7416 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2019-08-05 10:29:20.881 INFO 7416 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2019-08-05 10:29:20.906 INFO 7416 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2019-08-05 10:29:21.115 INFO 7416 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729 2019-08-05 10:29:21.164 INFO 7416 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2019-08-05 10:29:21.165 INFO 7416 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure 2019-08-05 10:29:21.170 INFO 7416 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource] 2019-08-05 10:29:21.196 INFO 7416 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2019-08-05 10:29:21.198 INFO 7416 --- [ restartedMain] com.xintujiuzhang.aimanagement.App : Started App in 8.458 seconds (JVM running for 8.828) Exception in thread "Thread-12" java.lang.RuntimeException: java.lang.NullPointerException at com.mysql.jdbc.JDBC4Connection$1$1.run(JDBC4Connection.java:106) Caused by: java.lang.NullPointerException at com.mysql.jdbc.ConnectionImpl.abortInternal(ConnectionImpl.java:1240) at com.mysql.jdbc.JDBC4Connection$1$1.run(JDBC4Connection.java:104) **在执行一些方法后“Thread-12”会不断增加** **ps:“Thread-668"**

java.lang.NoClassDefFoundError

java.lang.NoClassDefFoundError: org/mybatis/spring/mapper/MapperFactoryBean 配置mybatis整合Spring出这个异常,找了好久都没弄出来,求大神指教

Java反射 java.lang.NoSuchMethodException

``` public static void testTT() throws Exception { Class<?> clazz = Class.forName("reflect.Person"); // 获得构造器 Constructor<?> constructor = clazz.getDeclaredConstructor(new Class[] {}); // 根据类的默认构造器来获得一个对象 Object instance = constructor.newInstance(new Object[] {}); System.out.println(instance); Constructor<?> constructor2 = clazz .getDeclaredConstructor(new Class[] { Integer.class, String.class, Integer.class }); Object instance2 = constructor2.newInstance(new Object[]{1,"Tom",21}); System.out.println(instance2); } ``` ``` public Person(int id, String name, int age) { super(); this.id = id; this.name = name; this.age = age; } ``` ``` Exception in thread "main" java.lang.NoSuchMethodException: reflect.Person.<init>(java.lang.Integer, java.lang.String, java.lang.Integer) at java.lang.Class.getConstructor0(Unknown Source) at java.lang.Class.getDeclaredConstructor(Unknown Source) ```

异常java.lang.reflect.InvocationTargetException

``` java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.web.servlet.BaseServlet.service(BaseServlet.java:34) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.web.filter.EncodingFilter.doFilter(EncodingFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.NumberFormatException: null at java.lang.Integer.parseInt(Integer.java:454) at java.lang.Integer.parseInt(Integer.java:527) at com.web.servlet.ProductServlet.findByPage(ProductServlet.java:52) ... 28 more ```

Error querying database. Cause: java.lang.NullPointerException

###错误日志 org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: Error querying database. Cause: java.lang.NullPointerException Cause: java.lang.NullPointerException at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:79) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:447) at com.sun.proxy.$Proxy82.selectOne(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:167) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53) at com.sun.proxy.$Proxy180.shareRewardList(Unknown Source) at com.cn.ym.live.hottalk.service.common.impl.UserInfoServiceImpl.shareRewardList(UserInfoServiceImpl.java:82) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) at com.sun.proxy.$Proxy178.shareRewardList(Unknown Source) at com.cn.ym.live.hottalk.controller.UserInfoController.shareRewardList(UserInfoController.java:119) at com.cn.ym.live.hottalk.controller.UserInfoController$$FastClassBySpringCGLIB$$728252b4.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.validation.beanvalidation.MethodValidationInterceptor.invoke(MethodValidationInterceptor.java:139) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85) at com.cn.ym.live.hottalk.aop.WebControllerAop.doAround(WebControllerAop.java:46) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618) at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) at com.cn.ym.live.hottalk.controller.UserInfoController$$EnhancerBySpringCGLIB$$e47575b0.shareRewardList(<generated>) 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 org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129) at com.cn.ym.live.hottalk.aop.MyFilter.doFilter(MyFilter.java:62) at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61) at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131) at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.SessionRestoringHandler.handleRequest(SessionRestoringHandler.java:119) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292) at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138) at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135) at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48) at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:211) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:809) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.NullPointerException ### Cause: java.lang.NullPointerException at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:150) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:77) 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 org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:434) ... 104 common frames omitted Caused by: java.lang.NullPointerException: null at com.cn.ym.live.hottalk.config.db.MyAbstractRoutingDataSource.determineCurrentLookupKey(MyAbstractRoutingDataSource.java:24) at org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource.determineTargetDataSource(AbstractRoutingDataSource.java:196) at org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource.getConnection(AbstractRoutingDataSource.java:164) at com.github.pagehelper.PageHelper.getUrl(PageHelper.java:281) at com.github.pagehelper.PageHelper.getSqlUtil(PageHelper.java:305) at com.github.pagehelper.PageHelper.initSqlUtil(PageHelper.java:263) at com.github.pagehelper.PageHelper.intercept(PageHelper.java:250) at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61) at com.sun.proxy.$Proxy168.query(Unknown Source) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) ... 111 common frames omitted 2018-12-20 17:20:15.347 WARN 9616 --- [ XNIO-3 task-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolved exception caused by Handler execution: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: Error querying database. Cause: java.lang.NullPointerException Cause: java.lang.NullPointerException ###mapper.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN" "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd"> <mapper namespace="com.cn.ym.live.hottalk.dao.UserInviteLogDAO"> <!-- --> <select id="shareRewardList" resultType="ShareReward"> SELECT COUNT(invite_id) as number, SUM(coin) as money FROM hot_user_invite_log </select> ###dao层 public interface UserInviteLogDAO { /** * 日志增加用户邀请奖励 奖励金额 * * @param inviteLog */ public void addCoin(InviteLog inviteLog); /** * 获取邀请码 用户信息 * * @param map uid * @return */ public UserInfo userInviteLogDao(Map<String, Object> map1); /** * 用户获取邀请信息 * * @param uid * @param start_time * @param end_time * @return */ public ShareReward shareRewardList(); ###service @Autowired private UserInviteLogDAO userInviteLogDao; @Autowired private PayOrderDAO payOrderDAO; private static final Logger logger = LoggerFactory.getLogger(UserInfoService.class); /** * 用户获取邀请信息 * @param uid * @param start_time * @param end_time * @return */ public ShareReward shareRewardList(String uid, Long start_time, Long end_time) { Map<String , Object> map =new HashMap<>(); map.put("uid", uid); map.put("start_time", start_time); map.put("end_time", end_time); ShareReward shareReward = userInviteLogDao.shareRewardList(); return shareReward; }

mybatis 查询返回java.util.HashMap 类型的数据

Map<String, Object> Object 可以是List[String] 例: { "name":"", "pwd":"", "log":["","",""] }

MyBatis Generator 运行问题,怎么报类型转换错误,求大神帮组

java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919) at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.ja va:1041) at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImp l.java:3481) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2 445) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou rce) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java :334) at org.mybatis.generator.internal.db.ConnectionFactory.getConnection(Con nectionFactory.java:68) at org.mybatis.generator.config.Context.getConnection(Context.java:526) at org.mybatis.generator.config.Context.introspectTables(Context.java:43 6) at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator. java:222) at org.mybatis.generator.api.ShellRunner.main(ShellRunner.java:117) Caused by: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.ja va:992) ... 17 more D:\generator>java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xm l -overwrite java.sql.SQLException: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919) at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.ja va:1041) at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImp l.java:3481) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2 445) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:813) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou rce) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java :334) at org.mybatis.generator.internal.db.ConnectionFactory.getConnection(Con nectionFactory.java:68) at org.mybatis.generator.config.Context.getConnection(Context.java:526) at org.mybatis.generator.config.Context.introspectTables(Context.java:43 6) at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator. java:222) at org.mybatis.generator.api.ShellRunner.main(ShellRunner.java:117) Caused by: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long at com.mysql.jdbc.ConnectionImpl.buildCollationMapping(ConnectionImpl.ja va:992) ... 17 more <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <classPathEntry location="D:\generator\mysql-connector-java-5.1.21.jar" /> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressAllComments" value="true" /> </commentGenerator> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost/test" userId="root" password="root"> </jdbcConnection> <javaTypeResolver > <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <javaModelGenerator targetPackage="com.dto" targetProject="D:\generator\src"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <sqlMapGenerator targetPackage="com.mapping" targetProject="D:\generator\src"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <javaClientGenerator type="XMLMAPPER" targetPackage="com.dao" targetProject="D:\generator\src"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <table tableName="user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" /> </context> </generatorConfiguration>

很头疼一天了。。java.lang.NoSuchMethodException

![图片说明](https://img-ask.csdn.net/upload/201712/26/1514258910_543334.png) ![图片说明](https://img-ask.csdn.net/upload/201712/26/1514258929_437880.png) ``` SEVERE: Servlet.service() for servlet [MES] in context with path [/MES] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: Error instantiating class td.young.smp.entity.TSM_QPM_Q001 with invalid types () or values (). Cause: java.lang.NoSuchMethodException: td.young.smp.entity.TSM_QPM_Q001.<init>()] with root cause java.lang.NoSuchMethodException: td.young.smp.entity.TSM_QPM_Q001.<init>() ``` 究竟是为什么啊?不要和我说struts2的问题我就没有用这个框架,用的是ssm的。。

执行mybatis的配置文件generatorConfig.xml时报错:

如题:我是按照这个步骤做的: ![图片说明](https://img-ask.csdn.net/upload/201606/16/1466073662_307170.png) generatorConfig.xml配置如下: ![图片说明](https://img-ask.csdn.net/upload/201606/16/1466073746_495249.png) 本地generatorConfig.xml所在的目录: ![图片说明](https://img-ask.csdn.net/upload/201606/16/1466073820_789670.png) 在dos下执行报错: 请大家帮忙看看啊,谢谢!!! D:\data\mybatis\mybatis-generator\mybatis-generator-core-1.3.2>**java -jar D:\data\mybatis\mybatis-generator\mybatis-generator-core-1.3.2\lib\mybatis-generator-core-1.3.2.jar -configfile generatorConfig.xml -overwrit** Exception in thread "main" java.lang.RuntimeException: Exception getting JDBC Driver at org.mybatis.generator.internal.db.ConnectionFactory.getDriver(ConnectionFactory.java:85) at org.mybatis.generator.internal.db.ConnectionFactory.getConnection(ConnectionFactory.java:54) at org.mybatis.generator.config.Context.getConnection(Context.java:526) at org.mybatis.generator.config.Context.introspectTables(Context.java:436) at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:222) at org.mybatis.generator.api.ShellRunner.main(ShellRunner.java:117) Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:270) at org.mybatis.generator.internal.ObjectFactory.internalClassForName(ObjectFactory.java:150) at org.mybatis.generator.internal.ObjectFactory.externalClassForName(ObjectFactory.java:121) at org.mybatis.generator.internal.db.ConnectionFactory.getDriver(ConnectionFactory.java:82)

项目正常启动,运行报错java.lang.IncompatibleClassChangeError

``` 2017-11-20 13:10:06.661 DEBUG 14200 --- [nio-8080-exec-1] org.mybatis.spring.SqlSessionUtils : Creating a new SqlSession 2017-11-20 13:10:06.674 DEBUG 14200 --- [nio-8080-exec-1] org.mybatis.spring.SqlSessionUtils : SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@22394c1] was not registered for synchronization because synchronization is not active 2017-11-20 13:10:06.712 DEBUG 14200 --- [nio-8080-exec-1] org.mybatis.spring.SqlSessionUtils : Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@22394c1] 2017-11-20 13:10:06.718 ERROR 14200 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.IncompatibleClassChangeError: Implementing class] with root cause java.lang.IncompatibleClassChangeError: Implementing class ```

java报错java.lang.IndexOutOfBoundsException

![图片说明](https://img-ask.csdn.net/upload/201606/04/1465016132_558449.png) ![图片说明](https://img-ask.csdn.net/upload/201606/04/1465016148_409766.png) ![图片说明](https://img-ask.csdn.net/upload/201606/04/1465016141_240819.png) ![图片说明](https://img-ask.csdn.net/upload/201606/04/1465016206_139184.png) Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at java.util.ArrayList.rangeCheck(ArrayList.java:653) at java.util.ArrayList.get(ArrayList.java:429) at RobotInterface.joke(RobotInterface.java:295) at RobotGUI.main(RobotGUI.java:47) 在mac上跑的时候没有报错,在win上跑的时候就有这样的错误了,然后发现同样的语句在我另一个相似的函数里也有但是没有这样的报错,求谈里大神给分析分析,我baidu的情况来看好像是数组超界了?

mybatis与struts1 [java.lang.NoClassDefFoundError:org/apache/ibatis/io/Resources]

在Action中,当我要向数据库中插入一条记录时,报了下面的错误: [code="java"] javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/ibatis/io/Resources org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:294) org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) com.zrxx.action.ProjectAction.execute(ProjectAction.java:33) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) javax.servlet.http.HttpServlet.service(HttpServlet.java:637) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) java.lang.NoClassDefFoundError: org/apache/ibatis/io/Resources com.zrxx.util.SqlSessionFactoryTool.getSqlSessionFactory(SqlSessionFactoryTool.java:30) com.zrxx.dao.BaseDao.openSession(BaseDao.java:15) com.zrxx.dao.BaseDao.openSession(BaseDao.java:10) com.zrxx.dao.ProjectDao.insertPro(ProjectDao.java:13) com.zrxx.action.ProjectAction.add(ProjectAction.java:54) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270) org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187) com.zrxx.action.ProjectAction.execute(ProjectAction.java:33) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) javax.servlet.http.HttpServlet.service(HttpServlet.java:637) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) [/code] 这个错误是当dao对象已经创建了,调用dao.insert()时发出的 附上我的SqlSessionFactoryTool源代码: [code="java"] public class SqlSessionFactoryTool { private static SqlSessionFactoryTool tool; private SqlSessionFactory factory; public static SqlSessionFactoryTool getInstance(){ if(tool == null) tool = new SqlSessionFactoryTool(); return tool; } public SqlSessionFactory getSqlSessionFactory(){ String resource = "/mybatis.xml"; Reader reader = null; try { reader = Resources.getResourceAsReader(resource); } catch (IOException e) { e.printStackTrace(); } factory = new SqlSessionFactoryBuilder().build(reader); return factory; } [/code] 这是我的目录结构 [img]http://dl.iteye.com/upload/attachment/597707/8f659481-6204-34e4-9c24-18ba93290695.png[/img]

Mybatis提示Cannot find class [org.mybatis.spring.mapper.MapperScannerConfigurer]

如题:mybatis提示如下异常,是什么原因? by: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.mybatis.spring.mapper.MapperScannerConfigurer] for bean with name 'org.mybatis.spring.mapper.MapperScannerConfigurer#0' defined in class path resource [applicationContext-mybatis.xml]; nested exception is java.lang.ClassNotFoundException: org.mybatis.spring.mapper.MapperScannerConfigurer mybatis相关配置: <!-- scan for mappers and let them be autowired --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.hft.dal.mapper" /> <property name="markerInterface" value="com.hft.dal.SqlMapper" /> </bean>

Mybatis报错IllegalArgumentException

报错信息如下: org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.sunyard.insurance.dao.SyssequencesDao.getExtendId ### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.sunyard.insurance.dao.SyssequencesDao.getExtendId java.lang.Exception: [新单]|create imageExtend|投保书|任务已完结或者任务不存在|创建ImageExtend表记录时,异常.error:操作Extend表异常;sql= error message:nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.sunyard.insurance.dao.SyssequencesDao.getExtendId ### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.sunyard.insurance.dao.SyssequencesDao.getExtendId at com.sunyard.insurance.acsynchronized.TaskCreator.doNewCase(TaskCreator.java:216) at com.sunyard.insurance.acsynchronized.TaskCreator.create(TaskCreator.java:104) at com.sunyard.insurance.task.AcRe.dealBPOBatch(AcRe.java:403) at com.sunyard.insurance.task.AcRe.deal(AcRe.java:189) at com.sunyard.insurance.task.AcCall.call(AcCall.java:34) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) 我查找网上资料,很多都说是命名错误,但是我这边命名没有错,而且他也正常跑错,就是这个错误会在程序正常运行一段时间之后突然出现。 我现在怀疑这个和多线程有关系 我这边这个方法是定时任务,2分钟执行一次。 第一次没处理完,第二次再启动的时候好像就报错。 比如说第一次处理,发现有1000条数据要处理,但是2分钟过去只处理了500条,接着定时任务又开始启动这个方法 然后又开始接着就好像报错了。 上面只是我的猜测。 这个BUG已经困扰很久了,求大神帮忙

java.lang.NoSuchMethodError: ..Ljava/lang/Integer;

2015-2-27 13:21:47 org.apache.catalina.core.StandardWrapperValve invoke 严重: Servlet.service() for servlet default threw exception java.lang.NoSuchMethodError: cn.act.ict.software.domain.Tablestaff.getLeavingDayCnt()Ljava/lang/Integer; at cn.act.ict.software.action.LeavingotAction.leavingot_requestBySelf(LeavingotAction.java:562) 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.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404) at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)

SpringMVC,多次点一个请求链接时报java.lang.StackOverflowError

求问:一个SpringMVC项目,在连续多次点击同一个链接之后会导致java.lang.StackOverflowError栈溢出,报错信息如下: java.lang.StackOverflowError: at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479) at org.eclipse.jetty.server.Dispatcher$IncludeAttributes.getAttributeNames(Dispatcher.java:479)

Cause: java.lang.NoSuchMethodException: spring_cache.springtest.dao.Employee.<init>()?

![图片说明](https://img-ask.csdn.net/upload/201810/06/1538800958_237033.jpg) 以下是pojo ``` package spring_cache.springtest.pojo; public class Employee { private Integer id; private String lastName; private String email; //性别 1男 0女 private Integer gender; private Integer dId; public Employee() { } public Employee(Integer id, String lastName, String email, Integer gender, Integer dId) { super(); this.id = id; this.lastName = lastName; this.email = email; this.gender = gender; this.dId = dId; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public Integer getGender() { return gender; } public void setGender(Integer gender) { this.gender = gender; } public Integer getdId() { return dId; } public void setdId(Integer dId) { this.dId = dId; } @Override public String toString() { return "Employee [id=" + id + ", lastName=" + lastName + ", email=" + email + ", gender=" + gender + ", dId=" + dId + "]"; } } ``` mapper文件 ``` package spring_cache.springtest.dao; import org.apache.ibatis.annotations.*; /** * @author Dell */ @Mapper public interface Employee { @Select("SELECT * FROM employee WHERE id=#{id}") public Employee getEmployeeById(Integer id); @Update("update Employee set lastName=#{lastName},email=#{email},gender=#{gender},d_id=#{dId} where id=#{id}") public Employee updateEmp(Employee emp); @Delete("delete from Employee where id=#{id}") public void deleteEmp(Employee emp); @Insert("insert into Employee(lastName,email,gender,d_id) values(#{lastName},#{email},#{gender},#{dId})") public void InsertEmp(Employee emp); } ``` 配置文件 ``` spring.datasource.url=jdbc:mysql://localhost:3306/spring_cache spring.datasource.username=root spring.datasource.password=123 ``` 测试类 ``` package spring_cache.springtest; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import spring_cache.springtest.dao.Employee; @RunWith(SpringRunner.class) @SpringBootTest public class SpringtestApplicationTests { @Autowired Employee employee; @Test public void contextLoads() { Employee employeeById = employee.getEmployeeById(1); System.out.println(employeeById); } } ``` 错误信息 ``` Caused by: org.apache.ibatis.reflection.ReflectionException: Error instantiating interface spring_cache.springtest.dao.Employee with invalid types () or values (). Cause: java.lang.NoSuchMethodException: spring_cache.springtest.dao.Employee.<init>() ```

java.lang.OutOfMemory异常

各位大神,小生在做excel导出的时候遇见了这么一个问题,作为实习生实在是莫名其妙,求各位大神帮个小忙。 java.lang.OutOfMemoryError: GC overhead limit exceeded 16:31:22.700 [nioEventLoopGroup-2-8] WARN io.netty.channel.nio.NioEventLoop - Unexpected exception in the selector loop. java.lang.OutOfMemoryError: GC overhead limit exceeded at java.util.ArrayList.iterator(ArrayList.java:814) ~[na:1.7.0_80] at sun.nio.ch.WindowsSelectorImpl.updateSelectedKeys(WindowsSelectorImpl.java:496) ~[na:1.7.0_80] at sun.nio.ch.WindowsSelectorImpl.doSelect(WindowsSelectorImpl.java:172) ~[na:1.7.0_80] at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87) ~[na:1.7.0_80] at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98) ~[na:1.7.0_80] at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622) ~[netty-transport-4.0.32.Final.jar:4.0.32.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310) ~[netty-transport-4.0.32.Final.jar:4.0.32.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [netty-common-4.0.32.Final.jar:4.0.32.Final] at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137) [netty-common-4.0.32.Final.jar:4.0.32.Final] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80] 16:31:23.334 [Thread-6] ERROR o.a.e.i.a.AcquireTimerJobsRunnable - exception during timer job acquisition: GC overhead limit exceeded java.lang.OutOfMemoryError: GC overhead limit exceeded at java.util.Arrays.copyOf(Arrays.java:2367) ~[na:1.7.0_80] at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:130) ~[na:1.7.0_80] at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:114) ~[na:1.7.0_80] at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:415) ~[na:1.7.0_80] at java.lang.StringBuilder.append(StringBuilder.java:132) ~[na:1.7.0_80] at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:171) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:49) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.executor.BaseExecutor.createCacheKey(BaseExecutor.java:212) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.executor.CachingExecutor.createCacheKey(CachingExecutor.java:139) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:81) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120) ~[mybatis-3.3.0.jar:3.3.0] at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113) ~[mybatis-3.3.0.jar:3.3.0] at org.activiti.engine.impl.db.DbSqlSession.selectListWithRawParameter(DbSqlSession.java:438) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:429) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:424) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.db.DbSqlSession.selectList(DbSqlSession.java:411) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.persistence.entity.JobEntityManager.findNextTimerJobsToExecute(JobEntityManager.java:157) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.cmd.AcquireTimerJobsCmd.execute(AcquireTimerJobsCmd.java:45) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.cmd.AcquireTimerJobsCmd.execute(AcquireTimerJobsCmd.java:29) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47) ~[activiti-spring-5.19.0.2.jar:5.19.0.2] at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133) ~[spring-tx-4.2.2.RELEASE.jar:4.2.2.RELEASE] at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45) ~[activiti-spring-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at org.activiti.engine.impl.asyncexecutor.AcquireTimerJobsRunnable.run(AcquireTimerJobsRunnable.java:52) ~[activiti-engine-5.19.0.2.jar:5.19.0.2] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80] /report/collectionPaymentClass-report-down java.lang.OutOfMemoryError: GC overhead limit exceeded

关于java.lang.ClassCastException的问题 求大神解答 错误日志贴上 谢谢了

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