如何使用 java spring 验证来验证字符串长度？

Question

I have this field declared in a model class:

@Size(min = 2, max = 200, message = "{validation.name.size}")
private String name;

where validation.name.size is the path to a localized message. The problem is that I do not want to output a message like 'The name is too long or too short.'.

Is there any way to use two different messages and check minimum and maximum string length? @Min and @Max are only working for numeric types, so they can not be used. What is the alternative for strings?

Answer 1

You can just use the "@Size"-annotation twice:

@Size(min = 2, message = "{validation.name.size.too_short}")
@Size(max = 200, message = "{validation.name.size.too_long}")
private String name;

Answer 2

another option could be to use a regex. something like

^[a-zA-Z0-9]]{2,200}$

it depends if you want to control the characters.