如何防止在Struts2 textfield标记中显示默认值“0”

Question

I have a form with several textfields. When I populate it with data, there are some integer textfields which is showing '0', which is the default value for integer. I want the textfield to be blank than a zero.

<s:textfield id="txtPhone" name="phone"/>

Please help.

Answer 1

You need to use Integer class and not int for that. int will always be initialized to 0. S2 OGNL and type convertor will take care of type conversion for you.

For Integer default will be null and it will solve your issue.

Answer 2

如果该字段确实是可选的，请将字段设为Integer，因此默认值为null！