技術標籤：javajava

在除錯程式時遇到這樣一個錯誤

HTTP狀態 500 - 內部伺服器錯誤
型別 異常報告

訊息 Request processing failed; nested exception is org.springframework.dao.TransientDataAccessResourceException: Error attempting to get column 'units' from result set. Cause: java.sql.SQLException: Invalid value for getInt() - '元'

描述 伺服器遇到一個意外的情況，阻止它完成請求。

例外情況

org.
 
springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.dao.TransientDataAccessResourceException: Error attempting to get column 'units' from result set.  Cause: java.sql.SQLException: Invalid value for getInt() - '元'
; ]; Invalid value for
 
 getInt() - '元'; nested exception is java.sql.SQLException: Invalid value for getInt() - '元'
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:986)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881)
	javax.servlet.http.HttpServlet.
 
service(HttpServlet.java:652)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
根本原因。

org.springframework.dao.TransientDataAccessResourceException: Error attempting to get column 'units' from result set.  Cause: java.sql.SQLException: Invalid value for getInt() - '元'
; ]; Invalid value for getInt() - '元'; nested exception is java.sql.SQLException: Invalid value for getInt() - '元'
	org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:110)
	org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
	org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
	org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
	org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:447)
	com.sun.proxy.$Proxy19.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:231)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
	com.sun.proxy.$Proxy26.getCommodities(Unknown Source)
	com.supermarket.service.impl.CommodityServiceImpl.getCommodities(CommodityServiceImpl.java:21)
	com.supermarket.controller.CommodityController.getCommodities(CommodityController.java:24)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.base/java.lang.reflect.Method.invoke(Method.java:564)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:871)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:777)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
根本原因。

java.sql.SQLException: Invalid value for getInt() - '元'
	com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
	com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
	com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
	com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2646)
	com.mysql.jdbc.ResultSetImpl.getInt(ResultSetImpl.java:2734)
	com.mchange.v2.c3p0.impl.NewProxyResultSet.getInt(NewProxyResultSet.java:2573)
	org.apache.ibatis.type.IntegerTypeHandler.getNullableResult(IntegerTypeHandler.java:37)
	org.apache.ibatis.type.IntegerTypeHandler.getNullableResult(IntegerTypeHandler.java:26)
	org.apache.ibatis.type.BaseTypeHandler.getResult(BaseTypeHandler.java:66)
	org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyAutomaticMappings(DefaultResultSetHandler.java:516)
	org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:397)
	org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:351)
	org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:326)
	org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:299)
	org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:192)
	org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:64)
	org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
	org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63)
	org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
	org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
	org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.base/java.lang.reflect.Method.invoke(Method.java:564)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:434)
	com.sun.proxy.$Proxy19.selectList(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:231)
	org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:137)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:75)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
	com.sun.proxy.$Proxy26.getCommodities(Unknown Source)
	com.supermarket.service.impl.CommodityServiceImpl.getCommodities(CommodityServiceImpl.java:21)
	com.supermarket.controller.CommodityController.getCommodities(CommodityController.java:24)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.base/java.lang.reflect.Method.invoke(Method.java:564)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:871)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:777)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

從根本原因可以看出java.sql.SQLException: Invalid value for getInt() - ‘元’
肯定是實體類與欄位不匹配 大家可以好好檢視一下自己的實體資料型別是否和資料庫一致

程式報錯的位置在字元"元"上 看一下資料庫-------設計表

果然不同 ,我們把程式裡int改為String以後就可以完美運行了