我正在使用ibatis和java webapp插入一行. POJO有一个需要存储数字的字段(如3.0或2.34).我已尝试在java端使用BigDecimal和Double.在MySQL方面,我使用的是十进制(5,5)数据类型.

当我尝试插入一个“4”作为此数字字段的值的行时,MySQL和iBatis抛出以下异常：

org.springframework.jdbc.UncategorizedSQLException: SqlMapClient operation: encountered SQLException [  
--- The error occurred in org/mySQL.xml.  
--- The error occurred while applying a result map.  
--- Check the mySQL.insertQuery.  
--- The error happened while setting a property on the result object.  
--- Cause: java.lang.RuntimeException: org.springframework.jdbc.UncategorizedSQLException: SqlMapClient operation: encountered SQLException [  
--- The error occurred while applying a parameter map.  
--- Check the insertQuery-InlineParameterMap.  
--- Check the statement (update failed).  
--- Cause: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value for column 'numericColumn' at row 316]; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   
    at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:188)
    at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithRowHandler(GeneralStatement.java:133)
    at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryWithRowHandler(SqlMapExecutorDelegate.java:649)
    at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryWithRowHandler(SqlMapSessionImpl.java:156)
    at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryWithRowHandler(SqlMapClientImpl.java:133)
    at org.springframework.orm.ibatis.SqlMapClientTemplate$5.doInSqlMapClient(SqlMapClientTemplate.java:267)
    at org.springframework.orm.ibatis.SqlMapClientTemplate.execute(SqlMapClientTemplate.java:165)
    at org.springframework.orm.ibatis.SqlMapClientTemplate.queryWithRowHandler(SqlMapClientTemplate.java:265)
    at org.myClass(myClass.java:83)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:324)
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:248)
    at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:165)
    at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:66)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:191)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:516)

我是否使用错误的java数据类型来插入值？如果没有,为什么MySQL不允许我插入值？

解决方法:

您似乎误解了如何定义DECIMAL(或可能是NUMERIC)列在SQL中的工作原理 –
具体来说,将列定义为DECIMAL(x,y)时,x是列将存储的总位数,y是小数点后的位数.因此,在列定义中,您指定了范围-1<列< 1.数据类型是正确的,但您尝试指定的值超出了列允许的范围.
幸运的是,修复很简单：更改列定义.我假设您希望在小数点前最多有5位数,这将使列定义为DECIMAL(10,5).