2017-08-29 14:30:49,951 [http-bio-8888-exec-2] ERROR [core.security.process.exception.ExceptionResolverCustom] - nested exception is org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement ‘StudentMapper.count‘. It‘s likely that neither a Result Type nor a Result Map was specified. org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement ‘StudentMapper.count‘. It‘s likely that neither a Result Type nor a Result Map was specified. at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73) at core.util.CustomSqlSessionTemplate$SqlSessionInterceptor.invoke(CustomSqlSessionTemplate.java:316) at com.sun.proxy.$Proxy85.selectOne(Unknown Source) at core.util.CustomSqlSessionTemplate.selectOne(CustomSqlSessionTemplate.java:121) 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: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.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement ‘StudentMapper.count‘. It‘s likely that neither a Result Type nor a Result Map was specified. at org.apache.ibatis.executor.resultset.FastResultSetHandler.validateResultMapsCount(FastResultSetHandler.java:182) at org.apache.ibatis.executor.resultset.FastResultSetHandler.handleResultSets(FastResultSetHandler.java:155) at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:57) at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:70)
2、错误原因
<select id="count" parameterType="student"> select count(*) from t_student_info </select>
Mybatis配置文件中没有返回类型参数
3、解决办法
添加resultType参数值
<select id="count" parameterType="student" resultType="count"> select count(*) from t_student_info </select>
It's likely that neither a Result Type nor a Result Map was specified
原文地址:https://www.cnblogs.com/qingmuchuanqi48/p/12616973.html
时间: 2024-10-04 01:41:56