Jstl usage Summary (2) FMT tag library and FN tag Library

V. FMT tag Library

This tag library is used for international operations, such as time format, digital format conversion, and Region conversion;

1. supplement international knowledge

Zh_cn China

En_us us

Fr_fr France

2. <FMT: setlocale>

Used to determine the region. The general structure is as follows:

<FMT: setlocale value = ""/>

Value indicates the specified region, such as zh_cn;

3. <FMT: requestencoding>

Used to set the encoding. The general structure is as follows:

<FMT: requestencoding value = ""/>

Value is used to specify the encoding, such as GBK;

4. <FMT: setbundle> and <FMT: Message> are used to operate resource files. Note: The resource file is placed under the WEB-INF/classes!  

Set the resource file. The general structure is as follows:

<FMT: setbundle basename = "" Var = ""/>

Basename indicates the name of the resource file. The suffix of properties is not required. var indicates the attribute name of the resource file;

VaR is used in the <FMT: Message bundle = ""> attribute.

For example:

<FMT: setbundle basename = "1" Var = "PM"/>

<FMT: Message bundle ="$ {Pm}"/>

5. <FMT: Message>

Obtain the value corresponding to a specific key in the resource file. The general structure is as follows:

<FMT: Message key = "" Var = "" bundle = "/>

Key is used to specify a key;

VaR stores the value of value;

Bundle indicates the resource file;

6. <FMT: formatnumber>

Used to format numbers. The general structure is as follows:

<FMT: formarnumber value = "" Var = "" maxintegerdigits = "" maxfractiondigits = "" groupingused = ""/>

Value indicates the value to be formatted;

VaR stores the formatted value;

Maxintegerdigits is used to specify the number of digits in the integer part;

Maxfractiondigits is used to specify the digits of the fractional part;

Groupingused is used to specify whether a "," is separated; true or false

7. <FMT: parsenumber>

Parse numbers. The general structure is as follows:

<FMT: parsenumber value = "" Var = ""/>

8. <FMT: formatdate>

Format the date. The general structure is as follows:

<FMT: formatdate value = "" type = "" pattern = "" Var = ""/>

Type indicates formatting date or time, or all formatting, date, both, and time;

Pattern indicates the formatted format;

VaR: Save the result;

9. <FMT: parsedate>

Resolution date. The general structure is as follows:

<FMT: parsedate value = "" pattern = "" Var = ""/>

Code example:

<%@ page contentType="text/html" pageEncoding="GBK" import="java.util.*"%><%@ taglib prefix="fmt" uri="jstl/fmt"%><jsp:useBean id="per" class="org.person.Person" scope="page"/>
Vi. FN tag Library
The label of this tag library is similar to the method provided by string;

1. $ {fn: Contains (STR, "Var")} whether the string has VaR
2. $ {fn: containsignorecase (STR, "Var ")}
Whether the string has VAR (Case Insensitive)
3. $ {fn: startswith (STR, "Var")} whether the string starts with VAR
4. $ {fn: endswith (STR, "Var")} whether the string ends with VAR
5. $ {fn: substring (STR, int begin, int end )};
Extract string from begin-end-1
6. $ {fn: trim (STR)} remove the Left and Right Spaces
7. $ {fn: touppercase (STR)} Are all capitalized.
8. $ {fn: Replace (STR, "var1", "var2 ")};
Replace var1 with var2
9. $ {fn: Split (STR, ",") [I]} is divided by "," and 2nd are retrieved;