问题
I am using Spring's form:input as below :
<form:input type="number" .....>
in my jsp but when I check the html that is rendered on the browser it shows like :
type="number" type="text"
i.e., two type attributes are generated in the html.
On the other hand, if I check using inspect element option in the browser, it shows correct - only type="number" as expected.
Edit- My Question: Why am I getting two type attributes in generated html (type="number" type="text") ? How to get it resolved?
回答1:
Spring form:input tag doesnt have any attribute named type and the type=number used in your code belongs to html5 input tag
Also have a look at HTML Text Input allow only Numeric input
Spring form tld lists the valid attributes of form:input element here
回答2:
HTML 5
with <!DOCTYPE html> has native solution:
<input type="number">
Beware that it does not behave in standard way in some browsers.
Try input type="number" to see the HTML5 version in action.
See also https://github.com/jonstipe/number-polyfill for transparent support in older browsers.
回答3:
I know this is old, but i found a solution that works just fine for me.
The spring:input form tag doesnt support the type attribute and there is no such thing as spring:number.
But you can use jquery to add the type="number" attribute to the parsed html.
I used:
$(".selector").attr({
"type" : "number",
});
来源：https://stackoverflow.com/questions/27141458/spring-forminput-for-number