Message Incorrect result size: expected 1, actual 0 Description The server encountered an unexpecte

After I enter the account password in the login interface, the above error pops up

Referring to the statement of a great god:

 

 

wrong reason

由queryForObject(sql, new BeanPropertyRowMapper<User>(User.class),id);引起

I used the queryforobject method of JdbcTemplate in the DAO layer to cause this error

solve

 

According to line 25 of the error:

Press ctrl alt t to catch exceptions:

 

 

just fine