Mybatis3 if judgment string abnormal writing method

Mybatis is our commonly used space judgment operation. There are common problems:

Wrong writing method: if test = "status = =" Y '"

Result: exception numberformatexception thrown! There are very few tips. I can't see the problem!

Correct writing: if test ='status = = "Y" '

It can also be written like this: if test = "status = = 'y' toString()”

Or you can write if test = 'status = = "Y"'

Supplement: mybatis3 judgment string

A strange problem was found in the process of using mybatis3. The judgment string must be in the specified format

Mapper is as follows:

report errors:

Just change it to this. This problem also applies to the if tag

The above is the abnormal writing method of mybatis3 if judgment string introduced by Xiaobian. I hope it will be helpful to you. If you have any questions, please leave me a message, and Xiaobian will reply to you in time. Thank you very much for your support for the programming tips website!