数据库时间为空时查询出现 UncategorizedSQLException: Error attempting to get column ‘update_time‘ from result set

Posted 2023-03-03 Acmen-zym

异常详情

org.springframework.jdbc.UncategorizedSQLException: Error attempting to get column 'update_time' from result set.  Cause: java.sql.SQLException: Error
; uncategorized SQLException; SQL state [null]; error code [0]; Error; nested exception is java.sql.SQLException: Error
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:441)
	at com.sun.proxy.$Proxy158.selectList(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224)
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.executeForIPage(MybatisMapperMethod.java:121)
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:85)
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:148)
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89)
	at com.sun.proxy.$Proxy355.selectPage(Unknown Source)
	at com.hongmeng.service.auto_rule.impl.AutomaticRuleTemplateServiceImpl.findByPage(AutomaticRuleTemplateServiceImpl.java:192)

解决方案

重写时间日期类型的处理器，当值为null时直接返回，不执行处理方法

@Component
public class MybatisPlusLocalDateTimeTypeHandler extends LocalDateTimeTypeHandler 

    @Override
    public LocalDateTime getResult(ResultSet rs, String columnName) throws SQLException 
        Object object = rs.getObject(columnName);
        if (object == null) 
            return null;
        
        return super.getResult(rs, columnName);
    

@Component
public class MybatisPlusLocalDateTypeHandler extends LocalDateTypeHandler 

    @Override
    public LocalDate getResult(ResultSet rs, String columnName) throws SQLException 
        Object object = rs.getObject(columnName);
        if (object == null) 
            return null;
        
        return super.getResult(rs, columnName);
    

@Component
public class MybatisPlusLocalTimeTypeHandler extends LocalTimeTypeHandler 

    @Override
    public LocalTime getResult(ResultSet rs, String columnName) throws SQLException 
        Object object = rs.getObject(columnName);
        if (object == null) 
            return null;
        
        return super.getResult(rs, columnName);