【技术小常识之排查错误】org.springframework.dao.EmptyResultDataAccessException: Incorrect result size: expected

本文详细解析了在使用Spring框架的JdbcTemplate进行数据库查询时,遇到的EmptyResultDataAccessException和IncorrectResultSizeDataAccessException异常原因及解决方案。介绍了如何通过查询方法的替换或异常捕获来增强程序的健壮性。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

今天做了个查询数据库功能,用的Spring的JdbcTemplate的查询方法queryForObject,结果业务查询时出现如下错误:

之前一直未出现类似问题,然后深入源码DataAccessUtils.java,

 

据此分析应该是查询结果集为空,导致抛出异常EmptyResultDataAccessException,防止用户未对数据做判断,提高程序健壮性;如果结果集大于1也会报错,抛出IncorrectResultSizeDataAccessException异常,以保证返回单一的Object。

 

解决方法如下:

1、用query(可以使用in关键字查询同时可以自定义查询数据映射bean)方法替换queryForObject或者queryForMap,因为这两个方法必须要有值,不能为空。 

List list = jdbcTemplate.query(sql, new Object[]{}, new BeanPropertyRowMapper<业务Bean>(业务Bean.class));

2、把这个异常捕获,用try/catch,如下:

try {
    		Functioninfo functioninfo = jdbcTemplate.queryForObject(sql, new Object[]{funname}, new BeanPropertyRowMapper<Functioninfo>(Functioninfo.class));
    		if (functioninfo==null || StringUtils.isEmpty(functioninfo.getCode())) {
    			ajaxResult = AjaxResult.error(-1, "无法从数据库读取注册信息,请检查");
    		}
		} catch(EmptyResultDataAccessException ex) {
			ex.printStackTrace();
			ajaxResult = AjaxResult.error(-2, "data not found");
		}

 

从orcale更换到mysql,springbatch运行偶尔会报错: org.springframework.dao.EmptyResultDataAccessException: Incorrect result size: expected 1, actual 0 at org.springframework.dao.support.DataAccessUtils.nullableSingleResult(DataAccessUtils.java:97) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:784) at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:809) at org.springframework.batch.core.repository.dao.JdbcJobExecutionDao.synchronizeStatus(JdbcJobExecutionDao.java:308) at org.springframework.batch.core.repository.support.SimpleJobRepository.update(SimpleJobRepository.java:166) at sun.reflect.GeneratedMethodAccessor147.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) at com.sun.proxy.$Proxy85.update(Unknown Source) at sun.reflect.GeneratedMethodAccessor147.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
03-28
评论 1
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值