mybatis Parameter index out of range (1 > number of parameters, which is 0)

今天遇到了一个有意思的问题，看错误信息提示，好像是有个参数没有匹配上，具体错误信息如下：

### SQL: SELECT count(*) FROM (SELECT * FROM testTable) table_count; SQL []; Parameter index out of range (1 > number of parameters, which is 0).; nested exception is java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).### Cause: java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).    at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:108); SQL []; Parameter index out of range (1 > number of parameters, which is 0).; nested exception is java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).     at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)    at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:74)    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:399)    at com.sun.proxy.$Proxy24.selectList(Unknown Source)    at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:205)    at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:119)    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63)    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)    at com.sun.proxy.$Proxy66.gettestList(Unknown Source)    at org.jiankunking.test.database.service.Impl.EctestServiceImpl.gettestList(EctestServiceImpl.java:44)    at org.jiankunking.test.database.service.Impl.EctestServiceImpl$$FastClassBySpringCGLIB$$53317614.invoke(<generated>)    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:649)    at org.jiankunking.test.database.service.Impl.EctestServiceImpl$$EnhancerBySpringCGLIB$$575d6ee1.gettestList(<generated>)    at org.jiankunking.test.product.controller.EctestController.gettestList(EctestController.java:54)    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 org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:776)    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)    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 org.workholic.framework.common.ligeruiUtils.ServerPageFilter.doFilter(ServerPageFilter.java:44)    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$1.call(AbstractShiroFilter.java:365)    at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)    at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)    at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)    at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)    at org.workholic.framework.web.security.shirofilterfactory.ShiroFilterFactoryx$SpringShiroFilterx.doFilterInternal(ShiroFilterFactoryx.java:103)    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.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:505)    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:956)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)    at java.lang.Thread.run(Thread.java:745)Caused by: java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:937)    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:872)    at com.mysql.jdbc.PreparedStatement.checkBounds(PreparedStatement.java:3399)    at com.mysql.jdbc.PreparedStatement.setInternal(PreparedStatement.java:3384)    at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:4110)    at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_setString(FilterChainImpl.java:2823)    at com.alibaba.druid.filter.FilterAdapter.preparedStatement_setString(FilterAdapter.java:1340)    at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_setString(FilterChainImpl.java:2820)    at com.alibaba.druid.proxy.jdbc.PreparedStatementProxyImpl.setString(PreparedStatementProxyImpl.java:560)    at com.alibaba.druid.pool.DruidPooledPreparedStatement.setString(DruidPooledPreparedStatement.java:365)    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 org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:70)    at com.sun.proxy.$Proxy140.setString(Unknown Source)    at org.apache.ibatis.type.StringTypeHandler.setNonNullParameter(StringTypeHandler.java:31)    at org.apache.ibatis.type.StringTypeHandler.setNonNullParameter(StringTypeHandler.java:26)    at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:50)    at org.apache.ibatis.type.UnknownTypeHandler.setNonNullParameter(UnknownTypeHandler.java:45)    at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:50)    at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:81)    at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:80)    at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:61)    at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:74)    at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59)    at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)    at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:96)    at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:77)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:606)    at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49)    at com.github.pagehelper.SqlUtil._processPage(SqlUtil.java:386)    at com.github.pagehelper.SqlUtil.processPage(SqlUtil.java:329)    at com.github.pagehelper.PageHelper.intercept(PageHelper.java:150)    at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:60)    at com.sun.proxy.$Proxy138.query(Unknown Source)    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)    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 org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:386)    ... 69 more

小注：
SELECT count() FROM (SELECT FROM testTable) table_count
FORM里面的sql进行了简化。
问题分析：
1、通过输出出来的sql，到数据库中执行是没有问题，即：SELECT count(*) FROM (复杂sql) table_count执行没有问题，相应的变量也已经替换成功
2、在出现这个错误之前，我只进行了一个操作，那就是在mybatis的xml文件中注释了两行sql，如下图：

解决：
去掉注释或者直接删除这两行代码，问题消失。
说明mybatis在处理xml中这种注释的时候存在一定的问题。
小注：
我注释代码的操作是在idea中通过ctrl+/来操作的

作者：jiankunking 出处：http://blog.csdn.net/jiankunking