Caused by: org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "list")

短命女 2022-06-07 03:44 225阅读 0赞

1、错误描述

2017-10-08 23:58:06,672 ERROR [core.interceptor.ExceptionResolverCustom] (http-apr-8686-exec-4:) nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'pd.list'. Cause: org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "list")
    org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.BuilderException: Error evaluating expression 'pd.list'. Cause: org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "list")
    	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:364)
    	at com.sun.proxy.$Proxy19.selectList(Unknown Source)
    	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:194)
    	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
    	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:640)
    	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:640)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
    	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    	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.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
    	at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
    	at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
    	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
    	at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
    	at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
    	at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
    	at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
    	at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
    	at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
    	at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
    	at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
    	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: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:107)
    	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:218)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
    	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
    	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2549)
    	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2538)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    	at java.lang.Thread.run(Thread.java:748)
    Caused by: org.apache.ibatis.builder.BuilderException: Error evaluating expression 'pd.list'. Cause: org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "list")
    	at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:47)
    	at org.apache.ibatis.scripting.xmltags.ExpressionEvaluator.evaluateIterable(ExpressionEvaluator.java:36)
    	at org.apache.ibatis.scripting.xmltags.ForEachSqlNode.apply(ForEachSqlNode.java:51)
    	at org.apache.ibatis.scripting.xmltags.MixedSqlNode.apply(MixedSqlNode.java:29)
    	at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:37)
    	at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:265)
    	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:79)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:104)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:354)
    	... 86 more
    Caused by: org.apache.ibatis.ognl.OgnlException: source is null for getProperty(null, "list")
    	at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:1652)
    	at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:92)
    	at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
    	at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
    	at org.apache.ibatis.ognl.ASTChain.getValueBody(ASTChain.java:109)
    	at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
    	at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:210)
    	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:333)
    	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:413)
    	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:395)
    	at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:45)
    	... 99 more

2、错误原因

<foreach collection="pd.list" item="item" index="index" separator="union" >
              (SELECT stu_id,stu_name,stu_age FROM t_stu_${pd.list[${index}]})
    </foreach>

在Mybatis xml文件中，循环遍历查询数据库表时，查询分表需要获取表号，这里使用$\{\}，出现报错

3、解决办法

<foreach collection="pd.list" item="item" index="index" separator="union" >
              (SELECT stu_id,stu_name,stu_age FROM t_stu_#{pd.list[${index}]})
    </foreach>

应使用\#\{\}