心得18--JavaWEB国际化类和jstl对应的标签案例分析
1.locale类测试package com.hbsi.demo;import java.util.Locale; publicclass Demo1 { publicstaticvoid main(String[] args) { Locale locale = Locale.getDefault(); System.out.println(locale.getLanguage()+"-"+locale.getCountry()); }}国际化登录界面编写（此jsp只编写了中文和英文两种配置文件）<%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%> <!DOCTYPEHTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP '4.jsp' starting page</title> </head> <body> <% ResourceBundle rb = ResourceBundle.getBundle("com.hbsi.mypropertity.myproperties",request.getLocale()); %> <form> <%=rb.getString("username")%> : <inputtype="text"name="username"><br><br> <%=rb.getString("password")%> : <inputtype="password"name="password"><br><br> <inputtype="submit"value="<%=rb.getString("submit")%>"> <inputtype="reset"value="<%=rb.getString("reset")%>"> </form> </body></html>对应的标签编写的登录界面：案例一（setBundle标签）：<%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"prefix="fmt" %><!DOCTYPEHTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP '4.jsp' starting page</title> </head> <fmt:setLocalevalue="en"/> <fmt:setBundlebasename="com.hbsi.mypropertity.myproperties"/> <body> <form> <fmt:messagekey="username"/> : <inputtype="text"name="username"><br><br> <fmt:messagekey="password"/> : <inputtype="password"name="password"><br><br> <inputtype="submit"value="<fmt:messagekey="submit"/>"> <inputtype="reset"value="<fmt:messagekey="reset"/>"> </form> </body></html>案列二（bundle标签）：<%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"prefix="fmt" %><!DOCTYPEHTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP '4.jsp' starting page</title> </head> <fmt:bundlebasename="com.hbsi.mypropertity.myproperties"> <body> <form> <fmt:messagekey="username"/> : <inputtype="text"name="username"><br><br> <fmt:messagekey="password"/> : <inputtype="password"name="password"><br><br> <inputtype="submit"value="<fmt:messagekey="submit"/>"> <inputtype="reset"value="<fmt:messagekey="reset"/>"> </form> </body> </fmt:bundle></html>2.DateFormat类文件例子： package com.hbsi.demo; import java.text.DateFormat;import java.text.ParseException;import java.util.Date;import java.util.Locale; public class Demo2 { public static void main(String[] args) throws ParseException { Date date = new Date(); DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT,Locale.CHINA); System.out.println(df.format(date)); System.out.println("--------------"); DateFormat df1 = DateFormat.getTimeInstance(DateFormat.MEDIUM,Locale.CHINA); System.out.println(df1.format(date)); System.out.println("-------------"); DateFormat df2 = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.FULL,Locale.CHINA); System.out.println(df2.format(date)); System.out.println("--------------"); DateFormat df3 = DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL,Locale.ENGLISH); System.out.println(df3.format(date)); System.out.println("--------------"); String str = "12-11-23"; DateFormat df4 = DateFormat.getDateInstance(DateFormat.SHORT,Locale.CHINESE); System.out.println(df4.parse(str)); System.out.println("--------------"); String str1 = "2012-10-25"; DateFormat df5 = DateFormat.getDateInstance(DateFormat.MEDIUM,Locale.CHINESE); System.out.println(df5.parse(str1)); }}NumberFormat类文件package com.hbsi.demo; import java.text.NumberFormat;import java.text.ParseException;import java.util.Locale; public class Demo3 { public static void main(String[] args) throws ParseException { int number = 120; //测试同一数值在不同国家输出的货币形式，这里需要注意的是如果系统不存在该国家的货币形式会以乱码输出（¤120.00） NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.CHINA); System.out.println(nf.format(number)); System.out.println("------------"); NumberFormat nf5 = NumberFormat.getCurrencyInstance(Locale.US); System.out.println(nf5.format(number)); System.out.println("------------"); NumberFormat nf6 = NumberFormat.getCurrencyInstance(Locale.ENGLISH); System.out.println(nf6.format(number)); System.out.println("------------"); //测试百分比的输出，百分比跟数值的输出格式基本相同，比如下面的例子结果都是60% double number1 = 0.60; NumberFormat nf1 = NumberFormat.getPercentInstance(Locale.CHINA); System.out.println(nf1.format(number1)); System.out.println("------------"); NumberFormat nf2 = NumberFormat.getPercentInstance(Locale.US); System.out.println(nf2.format(number1)); System.out.println("------------"); //下面的两个例子是测试字符串转不同国家的数值格式，这里你的字符串是哪个国家的格式你转换的时候就要指明当地语言（Locale） String str = "￥120.00"; NumberFormat nf3 = NumberFormat.getCurrencyInstance(Locale.CHINA); System.out.println(nf3.parse(str)); System.out.println("------------"); String str1 = "$100"; NumberFormat nf4 = NumberFormat.getCurrencyInstance(Locale.US); System.out.println(nf4.parse(str1)); }}标签例子：<%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"prefix="fmt" %><!DOCTYPEHTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP '7.jsp' starting page</title> </head> <body> <fmt:formatDatevalue="<%=new Date()%>" type="date"/><br> <fmt:formatDatevalue="<%=new Date()%>" type="time"/><br> <fmt:formatDatevalue="<%=new Date()%>" type="both"/><br> <hr> <fmt:parseDatevalue="2012-11-23"pattern="yyyy-MM-dd"/><br> <fmt:parseDatevalue="2012-11-23"type="date"/> <hr> <fmt:formatNumbervalue="120"type="currency"pattern=".00元"/><br> <fmt:formatNumbervalue="120"type="currency"pattern="$.0"/><br> <hr> <fmt:parseNumbervalue="120.00"type="number"/><br> <fmt:parseNumbervalue="120.00元"type="number"/><br> </body></html>3.MessageFormat类文件：package com.hbsi.demo; import java.text.MessageFormat;import java.util.Date;import java.util.Locale; public class Demo4 { public static void main(String[] args) { String mes = "On {0}, a hurricance destroyed {1} houses and caused " + "{2} of damage."; MessageFormat mf = new MessageFormat(mes,Locale.US); Object[] parame = {new Date(),99,10000000}; System.out.println(mf.format(parame)); System.out.println("------------"); String mess = "At {0, time, short} on {0, date}, a hurricance destroyed{1} houses and caused {2, number, currency} of damage."; MessageFormat mf1 = new MessageFormat(mess,Locale.CHINA); Object[] parame1 = {new Date(),99,10000000}; System.out.println(mf1.format(parame1)); }}连接properties配置文件的类文件package com.hbsi.demo; import java.text.MessageFormat;import java.util.Date;import java.util.Locale;import java.util.ResourceBundle; public class Demo5 { /** * @param args */ public static void main(String[] args) { //中文环境下 //这句的Locale.CHINA设置message的显示格式 ResourceBundle rb = ResourceBundle.getBundle("com.hbsi.mypropertity.myproperties",Locale.CHINA); String message = rb.getString("message"); Object[] parame = {new Date(),99,1000000}; //这句的Locale.CHINA设置占位符的显示格式 MessageFormat mf = new MessageFormat(message,Locale.CHINA); System.out.println(mf.format(parame)); System.out.println("------------"); //英文环境下 ResourceBundle rb1 = ResourceBundle.getBundle("com.hbsi.mypropertity.myproperties",Locale.US); String message1 = rb1.getString("message"); Object[] parame1 = {new Date(),99,1000000}; MessageFormat mf1 = new MessageFormat(message1,Locale.US); System.out.println(mf1.format(parame1)); }}对应的标签文件：<%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"prefix="fmt" %><!DOCTYPEHTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP '8.jsp' starting page</title> </head> <body> <fmt:parseNumbervalue="99"type="number"var="num1"></fmt:parseNumber> <fmt:parseNumbervalue="1000000"type="number"var="num2"></fmt:parseNumber> <fmt:bundlebasename="com.hbsi.mypropertity.myproperties"> <fmt:messagekey="message"> <fmt:paramvalue="<%=new Date()%>"></fmt:param> <fmt:paramvalue="${num1}"></fmt:param> <fmt:paramvalue="${num2}"></fmt:param> </fmt:message> </fmt:bundle> </body></html>