selectById方法
根据id，查询记录
public void updateRecycleAssayBusinessItemCharge(String Id) {
AssayBusinessItemCharge assayBusinessItemCharge = assayBusinessItemChargeService.selectById(Id);
assayBusinessItemCharge.setRecordStatus(RecordStatusEnum.VALID.getValue());
assayBusinessItemChargeService.update(assayBusinessItemCharge);
}
selectByExample方法
根据实体字段，查询记录
public Account findByAccountName(String accountName) {
AccountExample accountExample = new AccountExample();
AccountExample.Criteria criteria = accountExample.createCriteria();
criteria.andAccountNameEqualTo(accountName);
List<Account> accountList = accountService.selectByExample(accountExample);
if (accountList == null || accountList.size() != 1)
return null;
else
return accountList.get(0);
}
查询所有list
传一个空的实体，不要给赋字段值
public Account findByAccountName(String accountName) {
AccountExample accountExample = new AccountExample();
AccountExample.Criteria criteria = accountExample.createCriteria();
List<Account> accountList = accountService.selectByExample(accountExample);
if (accountList == null || accountList.size() != 1)
return null;
else
return accountList.get(0);
}
总结
以上所述是小编给大家介绍的Mybatis中的select方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！
