JSP Database Connection JSP Standard Tag Library (JSTL)

<fmt:parseNumber> Tag

The <fmt:parseNumber> tag is used to parse numbers, percentages, and currencies.

Syntax format

<fmt:parseNumber
　　value="<string>"
　　type="<string>"
　　pattern="<string>"
　　parseLocale="<string>"
　　integerOnly="<string>"
　　var="<string>"
　　scope="<string>"/>

Attribute

The <fmt:parseNumber> tag has the following attributes:

Attribute	Description	Whether necessary	Default value
value	The number to be parsed	No	Body
type	NUMBER, CURRENCY, or PERCENT	No	number
parseLocale	Region used when parsing numbers	No	Default region
integerOnly	Whether to parse integers (true) or floating-point numbers (false) only	No	false
pattern	Custom parsing pattern	No	None
timeZone	Time zone of the date to be displayed	No	Default time zone
var	Variable to store the number to be parsed	No	Print to page
scope	Scope of var attribute	No	page

The pattern attribute has the same effect as the pattern in the <fmt:formatNumber> tag. During parsing, the pattern attribute tells the parser the expected format.

示例演示

<%@　page　language="java"　contentType="text/html;　charset=UTF-8"
　　　　pageEncoding="UTF-8"%>
<%@　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>
<h2>Number Parsing:</h2>
<c:set　var="balance"　value="1250003.350"　/>
<fmt:parseNumber　var="i"　type="number"　value="${balance}"　/>
<p>Number Parsing　(1)　:　<c:out　value="${i}"　/></p>
<fmt:parseNumber　var="i"　integerOnly="true"　
　　　　　　　　　　　　　　　　　　　　　　　type="number"　value="${balance}"　/>
<p>Number Parsing　(2)　:　<c:out　value="${i}"　/></p>
</body>
</html>

Running Results Below:

Number Parsing:
Number Parsing　(1)　:　1250003.35
Number Parsing　(2)　:　1250003

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<fmt:parseNumber> Tag

Syntax format

Attribute

示例演示