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How to parse number in JSP?
The <fmt:parseNumber> tag is used to parse numbers, percentages, and currencies.
Attribute
The <fmt:parseNumber> tag has the following attributes −
| Attribute | Description | Required | Default |
|---|---|---|---|
| Value | Numeric value to read (parse) | No | Body |
| type | NUMBER, CURRENCY, or PERCENT | No | number |
| parseLocale | Locale to use when parsing the number | No | Default locale |
| integerOnly | Whether to parse to an integer (true) or floating-point number (false) | No | false |
| pattern | Custom parsing pattern | No | None |
| timeZone | Time zone of the displayed date | No | Default time zone |
| var | Name of the variable to store the parsed number | No | Print to page |
| scope | Scope of the variable to store the formatted number | No | page |
A pattern attribute is provided that works just like the pattern attribute for the <fmt:formatNumber> tag. However, in the case of parsing, the pattern attribute tells the parser what format to expect.
Example
<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix = "fmt" uri = "http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
<title>JSTL fmt:parseNumber Tag</title>
</head>
<body>
<h3>Number Parsing:</h3>
<c:set var = "balance" value = "1250003.350" />
<fmt:parseNumber var = "i" type = "number" value = "${balance}" />
<p>Parsed Number (1) : <c:out value = "${i}" /></p>
<fmt:parseNumber var = "i" integerOnly = "true"
type = "number" value = "${balance}" />
<p>Parsed Number (2) : <c:out value = "${i}" /></p>
</body>
</html>The above code will generate the following result −
Number Parsing: Parsed Number (1) : 1250003.35 Parsed Number (2) : 1250003
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