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Before using the JSTL function tag library, you need to introduce it in the page:
<%@ taglib prefix= "FN" uri= "Http://java.sun.com/jsp/jstl/functions"%>
1, Fn:contains (string, substring)
Returns true if the parameter string contains the parameter substring.
2, Fn:containsignorecase (string, substring)
Returns true if the parameter string contains the parameter substring (ignoring case)
3, Fn:endswith (string, suffix)
Returns true if the argument string ends with the argument suffix.
4, Fn:escapexml (String)
Convert XML (and HTML) that has special meaning to the corresponding XML character entity code, and return.
5, Fn:indexof (string, substring)
Returns the position of the first occurrence of the parameter substring in the parameter string.
6, Fn:join (array, separator)
Separator a given array array together with the given spacer, forming a new string and returning it.
7. Fn:length (item)
Returns the number of elements contained in the parameter item. The parameter item type is an array, a collection, or a string. If it is of type string, the return value is the number of characters in string.
<Body> <% Stringa[]= {"AA","BB","cc","DD"}; Request.setattribute ("Array", a); Request.setattribute ("Store","guomei8899"); %> <c:ifTest= "${fn:contains (' guomeiddd ', ' Guomei ')}">Ok</c:if><BR> <c:ifTest= "${fn:containsignorecase (store, ' Guomei ')}">Ok OK</c:if><BR> <c:ifTest= "${fn:endswith (store, ' the '")} ">End</c:if><BR> <C:outvalue= "${fn:escapexml (' <> ')}"/><BR> <C:outvalue= "${fn:indexof (store, ' Om ')}"/><BR> <C:outvalue= "${fn:join (array, ' | ')}"/><BR> <C:outvalue= "${fn:length (Array)}"/><BR> </Body>
8, Fn:replace (string, before, after)
Returns a String object. Replaces all occurrences of a parameter before string in a parameter string with a parameter after string, and returns the replaced result.
9, Fn:startswith (string, prefix)
Returns true if the argument string starts with the parameter prefix.
10, fn:substring (string, begin, end)
Returns a string part of the argument string, starting with the argument begin to the argument end position.
11, Fn:substringafter (string, substring)
Returns the part of the string that the parameter substring follows in the argument string.
12, Fn:substringbefore (string, substring)
Returns the part of the string that precedes the argument substring in the argument string.
13, Fn:tolowercase (String)
Converts all characters of the argument string to lowercase and returns it.
14, Fn:touppercase (String)
Converts all characters of the argument string to uppercase and returns it.
15, Fn:trim (String)
Strips the argument string from the end of the space and returns it.
<Body> <% Stringa[]= {"AA","BB","cc","DD"}; Request.setattribute ("Array", a); Request.setattribute ("Store","guomei8899"); Request.setattribute ("User","U1,u2,u3,u4,u5"); Request.setattribute ("Test","ABcDeF"); %> <C:outvalue= "${fn:replace (store, ' 8 ', ' 9 ')}"/><BR> <C:outvalue= "${fn:split (user, ', ')}"/><BR> <C:outvalue= "${fn:startswith (store, ' G ')}"/><BR> <C:outvalue= "${fn:substring (store,2,5)}"/><BR> <C:outvalue= "${fn:substringafter (store, ' Mei ')}"/><BR> <C:outvalue= "${fn:substringbefore (store, ' Mei ')}"/><BR> <C:outvalue= "${fn:tolowercase (test)}"/><BR> <C:outvalue= "${fn:touppercase (test)}"/><BR> <C:outvalue= "${test}hoho"/><BR> <C:outvalue= "${fn:trim (test)}hoho"/><BR> </Body>
Jstl function Tag library fn label
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