Bug修改日记：MyBatis异常: MyBatisSystemException

Bug修改日记

作者简介：努力的clz ，一个努力编程的菜鸟
 
文章专栏：bug日志 ，记录一下平时开发过程中遇到的各种 疑难杂症 bug 、分析过程以及解决办法。
 
ʜᴀ͟ᴘ͟ᴘ͟ʏᴇᴠᴇʀʏᴅᴀʏ̆̈

 

一、报错信息

MyBatisSystemException 异常，关键信息：There is no getter for property named 'count' in 'class java.lang.Integer'
 
“class java.lang.Integer”中名为“count”的属性没有getter

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'count' in 'class java.lang.Integer'
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:77) ~[mybatis-spring-1.3.1.jar:1.3.1]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) ~[mybatis-spring-1.3.1.jar:1.3.1]
	at jdk.proxy2/jdk.proxy2.$Proxy49.selectList(Unknown Source) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230) ~[mybatis-spring-1.3.1.jar:1.3.1]
	at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) ~[mybatis-3.4.2.jar:3.4.2]
	at jdk.proxy2/jdk.proxy2.$Proxy53.selectLimit(Unknown Source) ~[na:na]
	at com.clz.job.FileDataflowJob.fetchData(FileDataflowJob.java:36) ~[classes/:na]
	at com.dangdang.ddframe.job.executor.type.DataflowJobExecutor.fetchData(DataflowJobExecutor.java:71) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.executor.type.DataflowJobExecutor.streamingExecute(DataflowJobExecutor.java:53) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.executor.type.DataflowJobExecutor.process(DataflowJobExecutor.java:46) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.executor.AbstractElasticJobExecutor.process(AbstractElasticJobExecutor.java:206) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.executor.AbstractElasticJobExecutor.process(AbstractElasticJobExecutor.java:171) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.executor.AbstractElasticJobExecutor.execute(AbstractElasticJobExecutor.java:150) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.executor.AbstractElasticJobExecutor.execute(AbstractElasticJobExecutor.java:122) ~[elastic-job-common-core-2.1.5.jar:na]
	at com.dangdang.ddframe.job.lite.internal.schedule.LiteJob.execute(LiteJob.java:26) ~[elastic-job-lite-core-2.1.5.jar:na]
	at org.quartz.core.JobRunShell.run(JobRunShell.java:202) ~[quartz-2.3.0.jar:na]
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573) ~[quartz-2.3.0.jar:na]
Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'count' in 'class java.lang.Integer'
	at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:422) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.reflection.MetaClass.getGetInvoker(MetaClass.java:164) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:162) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:49) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:122) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextMap.get(DynamicContext.java:94) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.scripting.xmltags.DynamicContext$ContextAccessor.getProperty(DynamicContext.java:108) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.ognl.OgnlRuntime.getProperty(OgnlRuntime.java:2666) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.ognl.ASTProperty.getValueBody(ASTProperty.java:114) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.ognl.SimpleNode.getValue(SimpleNode.java:258) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:467) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.ognl.Ognl.getValue(Ognl.java:431) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.scripting.xmltags.OgnlCache.getValue(OgnlCache.java:44) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.scripting.xmltags.TextSqlNode$BindingTokenParser.handleToken(TextSqlNode.java:77) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.parsing.GenericTokenParser.parse(GenericTokenParser.java:78) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.scripting.xmltags.TextSqlNode.apply(TextSqlNode.java:51) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.scripting.xmltags.DynamicSqlSource.getBoundSql(DynamicSqlSource.java:41) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.mapping.MappedStatement.getBoundSql(MappedStatement.java:292) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:81) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148) ~[mybatis-3.4.2.jar:3.4.2]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141) ~[mybatis-3.4.2.jar:3.4.2]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) ~[mybatis-spring-1.3.1.jar:1.3.1]
	... 17 common frames omitted

 

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二、问题分析

从报错信息中可以看出，是 mapper包 中的 sql语句语法写错了，认真检查 sql语句 和 字段名称 是否对应；

 

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三、解决办法

经过检查，确实是 sql语句写错了 (把 # 写错 $，导致项目出错)

 

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博主到了这里是成功解决了bug，也希望对读者的bug修复能起作用。
不过可能不同的原因引发同样的bug，如果是其它的解决办法，能拜托把其它的解决方法链接分享到评论区吗，这样可以更加有效的帮助后来的读者去解决问题，共同进步，十分感谢！