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Similar to digital and currency formatting, the localized environment also affects how dates and times are generated.
<%@ page 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"%>
<title>date formatting</title>
<body>
<fmt:timezone value= "EST" >
<jsp:usebean id= "CurrentTime" class= "Java.util.Date"/>
<fmt:setlocale value= "en_GB"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
<fmt:setlocale value= "en_US"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
<fmt:setlocale value= "Fr_fr"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
<fmt:setlocale value= "Ja_jp"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
<fmt:setlocale value= "Ko_kr"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
<fmt:setlocale value= "Es_es"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
<fmt:setlocale value= "Ar_eg"/>
<fmt:formatdate type= "Both" datestyle= "full" timestyle= "full" value= "${currenttime}"/><br/>
</fmt:timeZone>
</body>
properties of the <fmt:formatDate> action
Type: can be time,date , or both. Controls whether only the time is generated, the date is generated, or the time date is generated.
Datestyle: can be short , medium, long or full (default). Controls the specific format used for the print date.
Timestyle: can be short , medium, long or full (default). Controls the specific format used for printing time.
Value: This is a java.util.Date type that is used to generate the date and time.
jstl Formatting date labelsJSP Standard Tag Libraries
Formatting and internationalization
The form input parameters, ' date ' and ' isodate ', is url-encoded in the link leading to the page. ' Isodate ' is formatted according-to-the-ISO8601 standard.
Formatting of numbers and dates are based on the browser ' s locale setting. Formatting if you switch the default language setting from 中文版 to French or German, for example. (The browser needs to be restarted, too.)
Library Import and parameter capturing:
<%@ taglib prefix= "C" uri= "Http://java.sun.com/jstl/core"%>
<%@ taglib prefix= "FMT" uri= "Http://java.sun.com/jstl/fmt"%>
<fmt:parsedate value= "${param.date}" var= "date" pattern= "yyyy/mm/dd:hh:mm:ss>
<fmt:parsedate value= "${param.isodate}" var= "Isodate" pattern= "YyyyMMdd ' T ' Hhmmss" >
The input parameters must match the patterns, or the JSP would thrown an exception. This page does no error handling.
Input Parameters:
date:2004/04/01:13:30:00 Java Format:thu Apr 13:30:00 CST 2004
isodate:20040531t235959 Java Format:mon 23:59:59 CDT 2004
Dates
Tag Output
Attribute:value; Required. Tag has no body. (Typedefault isdate)
<fmt:formatdate value= "${date}" type= "both"/>
2004-4-1 13:30:00
<fmt:formatdate value= "${isodate}" type= "both"/>
2004-5-31 23:59:59
Attribute:type; Optional. Indicates to Print:date, time, or both.
<fmt:formatdate value= "${date}" type= "date"/>
2004-4-1
<fmt:formatdate value= "${isodate}" type= "Time"/>
23:59:59
Attribute:datestyle; Optional. varies the date format. (The default isMedium)
<fmt:formatdate value= "${isodate}" type= "date" datestyle= "Default"/>
2004-5-31
<fmt:formatdate value= "${isodate}" type= "date" datestyle= "short"/>
04-5-31
<fmt:formatdate value= "${isodate}" type= "date" datestyle= "Medium"/>
2004-5-31
<fmt:formatdate value= "${isodate}" type= "date" datestyle= "Long"/>
2004years5Month toDay
<fmt:formatdate value= "${isodate}" type= "date" datestyle= "full"/>
2004years5Month toDay Monday
Attribute:timestyle; Optional. varies the time format. (The default isMedium)
<fmt:formatdate value= "${isodate}" type= "Time" timestyle= "Default"/>
23:59:59
<fmt:formatdate value= "${isodate}" type= "Time" timestyle= "short"/>
Afternoon11:59
<fmt:formatdate value= "${isodate}" type= "Time" timestyle= "Medium"/>
23:59:59
<fmt:formatdate value= "${isodate}" type= "Time" timestyle= "Long"/>
Afternoon Onewhen -points -seconds
<fmt:formatdate value= "${isodate}" type= "Time" timestyle= "full"/>
Afternoon Onewhen -points -secondsCDT
Attribute:pattern; Optional. Inidcates Date/time Custom Patterns.
<fmt:formatdate value= "${date}" type= "both" pattern= "eeee, MMMM D, yyyy HH:mm:ss Z"/>
Thursday, April1, 2004 13:30:00-0600
<fmt:formatdate value= "${isodate}" type= "both" pattern= "D MMM yy, h:m:s a zzzz/>
Display: $12.00
<fmt:formatnumber value= "type=" Currency "pattern=" $.00 "/> <br/>
Display: $12.0
<fmt:formatnumber value= "type=" Currency "pattern=" $.# "/> <br/>
￥12.0
<fmt:formatnumber value= "type=" Currency "pattern=" ￥.00 "/> <br/>
12.00 USD
<fmt:formatnumber value= "type=" Currency "pattern=" #0.00 USD "/> <br/>
￥12.00
<fmt:formatnumber value= "" type= "Currency"/> (the symbol for that currency is related to the local setting of the current Web server) <br/>
123456.79
<fmt:formatnumber value= "123456.7891" pattern= "#0. xx"/> <br/>
123,456.79
<fmt:formatnumber value= "123456.7891" pattern= "#, #00. xx"/> <br/>
.79
<fmt:formatnumber value= "0.7891" pattern= "#.00"/> <br/>
12.34%
<fmt:formatnumber value= "0.1234" type= "percent" pattern= "#0.00%"/><br/>
1,200%
<fmt:formatnumber value= "type=" percent "/><br/>
1200%
<fmt:formatnumber value= "type=" percent "pattern=" #0.00% "/><br/>"
------------------------------------------------------------------------------
Java formatted output:
DecimalFormat df = new DecimalFormat ("format");
String FMT =df.format (double);
Symbolic meaning
01 Digits
# one digit, leading 0 and rear-end 0 not shown
. decimal point Split position
, the position of the group separator
-Negative prefix
% is used 100 times, and the percent sign is displayed
Any other symbol that includes the specified symbol in the output string
Formatting tag library: is used to do international formatting in the JSP page action
are divided into two categories, namely:
International core Tags:<fmt:setlocale>, <fmt:bundle>, <fmt:setBundle>, <fmt:message>, <fmt:param>, <fmt:requestEncoding>
Formatting tags:<fmt:timezone>, <fmt:setTimeZone>, <fmt:formatNumber>, <fmt:parseNumber>, <fmt: Formatdate>, <fmt:parseDate>
1.<fmt:setlocale> Tags: for setting up a localized environment
Property Description
Value:locale the specified environment, which can be an instance of the Java.util.Locale or String type
Scope:locale the scope of the environment variable (optional)
Such as:
Set local environment to traditional Chinese
<fmt:setlocale value= "Zh_tw"/>
Set local environment to Simplified Chinese
<fmt:setlocale value= "Zh_cn"/>
2.<fmt:requestencoding> Tags: used to set character encoding for requests
It has only one property, value, in which the character encoding can be defined.
Such as:
<fmt:requestencoding value= "GB2312"/>
3.<fmt:bundle>, <fmt:setBundle> Tags: data sources for resource profiles
The 3.1<fmt:bundle> tag binds a resource profile to the display in its tag body
Property Description
basename: Specify the resource profile, just specify the file name without the extension
Prefix: Pre-keyword
Such as:
The data configured in the resource file is:
Label.backcolor= #FFF
Label.fontcolor= #000
Then, you can get the BackColor and FontColor values for the label as follows:
<fmt:bundle basename= "Myresourse" prefix= "label." >
<fmt:message key= "BackColor"/>
<fmt:message key= "FontColor"/>
</fmt:bundle>
The 3.2<fmt:setbundle> tag allows you to save a resource profile as a variable, which you can then work on according to the variable.
Attribute description, property shared by two sets of labels
Var:<fmt:setbundle> Unique property for saving a resource profile as a variable
Scope: The scope of the variable
Such as:
Find a resource profile named Applicationmessage_zh_cn.properties to be shown as Resource binding
<fmt:setbundle basename= "Applicationmessage" var= "Applicationbundle"/>
4.<fmt:message> Tags: used to display resource profile information (the resource file must follow the following format:
1. The extension must be properties,2. The contents of the file must be in the format of key = value; 3. File to be placed in the web-inf/classes directory)
Property Description
Key: The "key" designation for the resource profile
Bundle: If you use <fmt:setBundle> to save a resource profile, this property can be found from a saved resource profile
var: Save display information as a variable
Scope: The scope of the variable
Such as:
1) The "Applicationmessage" resource profile is assigned to the variable "Applicationbundle" with the <fmt:setBundle> tag
Use the <fmt:message> tab to display information about "key" as "PassWord" in the resource profile saved by the <fmt:setBundle> tag
<fmt:setbundle basename= "Applicationmessage" var= "Applicationbundle"/>
<fmt:message key= "PassWord" bundle= "${applicationbundle}"/>
2) the "Applicationallmessage" resource profile defined with the <fmt:bundle> tag acts on the display in its label body
Use the <fmt:message> tab to display the information "key" is "UserName" in the "Applicationallmessage" Resource configuration file
<fmt:bundle basename= "Applicationallmessage" >
<fmt:message key= "UserName"/>
</fmt:bundle>
5.<fmt:param Tags: for parameter passing
The <fmt:param> tag should be in the <fmt:message> tab and will provide the parameter value for the message label. It has only one property value
For example: In the Myresourse.properties file, there is an index value as follows (where {0} represents a placeholder):
STR2=HI,{0}
Then, use the <fmt:param> tag to pass in the values as follows:
<fmt:bundle basename= "Myresourse" >
<fmt:message key= "STR2" >
<fmt:param value= "Zhang San"/>
</fmt:message>
</fmt:bundle>
You can also specify the type of the parameter in the resource file:
For example: In the Myresourse.properties file, there is an index value as follows:
Str3={0,date}
Then, use the <fmt:param> tag to pass in the values as follows:
<% Request.setattribute ("Now", New Date ()); %>
<fmt:bundle basename= "Myresourse" >
<fmt:message key= "STR3" >
<fmt:param value= "${now}"/>
</fmt:message>
</fmt:bundle>
6.<fmt:timezone>, <fmt:setTimeZone> Tags: for setting time zones
<fmt:timeZone> tags will allow work in its label body to use this time zone setting
The <fmt:setTimeZone> tag allows you to save the time zone setting as a variable, after which the work can be done according to the variable
Property Description
Value: Settings for the time zone
Var:<fmt:settimezone> Unique property for saving the time zone as a variable
Scope: The scope of the variable
7.<fmt:formatnumber> Tags: for formatting numbers
Property Description
Value: A formatted number that can be an instance of type String or Java.lang.Number
Type: Formatted types, possible values include: currency (currency), number (numeric), and percent (percent)
Pattern: Format mode
var: result save variable
Scope: The scope of the variable
Maxintegerdigits: Specifies the maximum value of the formatted result
Minintegerdigits: Specifies the minimum value of the formatted result
Maxfractiondigits: Specifies the maximum value of the formatted result, with decimals
Minfractiondigits: Specifies the minimum value for the formatted result, with decimals
Such as:
The results will be saved in the "money" variable, and the local currency format will be displayed according to the locale environment
<fmt:formatnumber value= "1000.888" type= "Currency" var= "Money"/>
8.<fmt:parsenumber> Tags: used to parse numbers
Property Description
Value: The string to be parsed
Type: Parsing the formatted types
Pattern: Parsing Formatting patterns
var: result save variable, type Java.lang.Number
Scope: The scope of the variable
Parselocale: Parses a string in a localized form, and the content of the property should be an instance of a string or Java.util.Locale type
Such as:
Convert "15%" to a number
<fmt:parsenumber value= "15%" type= "percent" var= "num"/>
9.<fmt:formatdate> Tags: for formatting dates
Property Description
Value: The formatted date, and the content of the attribute should be an instance of the Java.util.Date type
Type: Formatted types
Pattern: Format mode
var: result save variable
Scope: The scope of the variable
TimeZone: Specifies the time zone for the formatted date
10.<fmt:parsedate> Tags: for resolving dates
Property Description
Value: The string to be parsed
Type: Parsing the formatted types
Pattern: Parsing Formatting patterns
var: result save variable, type Java.lang.Date
Scope: The scope of the variable
Parselocale: Parses a string in a localized form, with the contents of the property being an instance of type string or Java.util.Locale
TimeZone: Specifies the time zone to parse the formatted date
Jstl the FMT tag in the tag library, date, number formatting
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