struts２.０学习笔记（四）－

Struts　笔记
2008　08　23
    为什么把国际化通称I18n呢?   你数数国际化的单词 internationalization有几个字母?   20个!   那头尾各是什么字母?   i和n!   20-2=?   18!   那好请记下:I18n
一.标准i18n(国际化)操作
(1)添加资源文件的方式之一:在struts.xml文件中引入资源文件     < constant name ="struts.custom.i18n.resources" 　value ="资源文件名" />
        添加资源文件的方式之二:创建struts.properties并在添加语句struts.custom.i18n.resources=资源文件名
(2)在JSP页面中调用资源文件的方法:
        1)    使用 < s:text key / label />
                如: < s:text name ="HelloWorld" />
        2)    使用 < s:property >
            如:
             
             < s:property value ="%{getText('HelloWorld')}" />
             
             < s:textfield name ="name" label ="%{getText('HelloWorld')}" />
(3)资源文件不同配置的自动查找顺序
        第一:通过 < s:i18n > 访问待定位置的资源文件
        第二:Action范围的资源文件(只能由Action调用),资源文件名在Action的类文件的同级目录下,与Action类名相同.
        第三:包范围内的资源文件(以模块方式管理资源文件),放在包目录下.以package_en_zh
        第四:通用性较强的全局资源文件,放在SRC目录下

项目树型图

src/struts.xml

1 <? xml version="1.0" encoding="GBK" ?>
2 <! DOCTYPE struts PUBLIC
3          "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
4          "http://struts.apache.org/dtds/struts-2.0.dtd" >
5 < struts >
6      
16      < constant name ="struts.custom.i18n.resources"
17         value ="globalMessages" />
18      < include file ="struts-default.xml" /> 
19
20      
21      < package name ="I18nDemo" extends ="struts-default" >
22
23          
24          < action name ="LoginAction" class ="com.Login.LoginAction" >
25              < result > /LoginAction.jsp </ result >
26          </ action >
27      </ package >
28 </ struts >
29
30

WebRoot/WEB-INF/web.xml

1 <? xml version="1.0" encoding="UTF-8" ?>
2 < web-app id ="WebApp_ID" version ="2.4"
3     xmlns ="http://java.sun.com/xml/ns/j2ee"
4     xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
5     xsi:schemaLocation ="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >
6      < display-name > Struts2Hello </ display-name >
7      < filter >
8          < filter-name > struts2 </ filter-name >
9          < filter-class >
10             org.apache.struts2.dispatcher.FilterDispatcher
11          </ filter-class > 
12      </ filter >
13      < filter-mapping >
14          < filter-name > struts2 </ filter-name >
15          < url-pattern > /* </ url-pattern > 
16      </ filter-mapping >
17      < welcome-file-list >
18          < welcome-file > index.html </ welcome-file >
19          < welcome-file > index.htm </ welcome-file >
20          < welcome-file > index.jsp </ welcome-file >
21          < welcome-file > default.html </ welcome-file >
22          < welcome-file > default.htm </ welcome-file >
23          < welcome-file > default.jsp </ welcome-file >
24      </ welcome-file-list >
25 </ web-app >
26

WebRoot/index.jsp

1 <%

@ page contentType="text/html; charset=UTF-8" %>
2 <%

@taglib prefix="s" uri="/struts-tags" %>
3 < html >
4      < head >
5          < title > Hello World </ title >
6      </ head >
7      < body >
8          < h2 >
9              < s:text name ="HelloWorld" />
10          </ h2 >
11          < h2 >
12              
16              < s:property value ="%{getText('HelloWorld')}" />
17          </ h2 >
18          
19          < s:textfield name ="name" label ="%{getText('HelloWorld')}" />
20      </ body >
21 </ html >
22
23

WebRoot/LoginAction.jsp

1 <%

@ page language="java" import="java.util.*" pageEncoding="GBK" %>
2 <%

@ page contentType="text/html; charset=GBK" %>
3 <%

4    String path = request.getContextPath();
5    String basePath = request.getScheme() + "://"
6            + request.getServerName() + ":" + request.getServerPort()
7            + path + "/";
8 %>
9 <%

@taglib prefix="s" uri="/struts-tags" %>
10 <! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
11 < html >
12      < head >
13          < title > Login Action </ title >
14      </ head >
15      
16      < body >
17          
21         ${requestScope.tip}
22          < br >
23         ${sessionScope.user}
24          < br >
25
26          
30          < jsp:useBean id ="d" class ="java.util.Date" scope ="page" />
31          
32          < s:text name ="msg" >
33
34              <%

35                //给msg的{0}携带值
36             %>
37              < s:param >
38                  < s:property value ="uname" />
39              </ s:param >
40
41              <%

42                //给msg的{1}携带值
43             %>
44              < s:param > ${d} </ s:param >
45          </ s:text >
46
47          
48          < s:i18n name ="globalMessages" >
49              < s:text name ="HelloWorld" />
50          </ s:i18n >
51          < br >
52          
53          < s:property value ="%{getText('HelloWorld')}" />
54          < br >
55          < hr >
56          
57          < s:include value ="LangSelector.jsp" />
58      </ body >
59 </ html >
60

WebRoot/LangSelector.jsp

1 <%

@ page language="java" contentType="text/html; charset=GBK" %>
2
3 <%

@taglib prefix="s" uri="/struts-tags" %>
4
5 
6 < script type ="text/javascript" >

7function langSelecter_onChanged()
8

{
9    document.getElementById("langForm").submit();
10}
11 </ script >
12
13
14 
19 < s:set name ="SESSION_LOCALE" value ="#session['WW_TRANS_I18N_LOCALE']" />
20 < s:bean id ="locales" name ="com.locales.Locales" >
21      < s:param name ="current"
22         value ="#SESSION_LOCALE == null?locale:#SESSION_LOCALE" />
23 </ s:bean >
24
25 
30 < form action ="<s:url/>" id ="langForm"
31     style ="background-color: #bbbbbb; padding-top: 4px; padding-bottom: 4px;" >
32      < s:text name ="languag" />
33      < s:select label ="Language" list ="#locales.locales" listKey ="value"
34         listValue ="key"
35         value ="#SESSION_LOCALE == null ? locale : #SESSION_LOCALE"
36         name ="request_locale" id ="langSelecter"
37         onchange ="langSelecter_onChanged()" theme ="simple" />
38 </ form >
39

src/com/package_en_US.properties

succtip=Login success
failtip=Login failed

src/com/package_zh_CN.properties

succtip=\u767B\u5F55\u6210\u529F
failtip=\u767B\u5F55\u5931\u8D25

src/com.i18n.Loc.java

1 package com.i18n;
2
3 import java.util.Locale;
4
5 /** */ /**
6 * @author ∪∩BUG E-mail: [email protected]
7 * @version Aug 23, 2008 3:37:45 PM
8 * @获取语言环境
9 */
10 public class Loc

{
11 public static void main(String[] args)

{
12 Locale[] localelist = Locale.getAvailableLocales();
13 for (int i = 0; i < localelist.length; i++)

{
14            // 打印国家名+国家编写名+语言名+语言缩写名
15            System.out.println(localelist[i].getDisplayCountry() + " = "
16                    + localelist[i].getCountry() + "  "
17                    + localelist[i].getDisplayLanguage() + " = "
18                    + localelist[i].getLanguage());
19        }
20        // 获取系统的默认的国家/语言环境
21        // Locale myLocale = Locale.getDefault();
22        // ResourceBundle bundle = ResourceBundle.getBundle("资源文件名", myLocale);
23        // System.out.println(bundle.getString("定义的Key键"));
24    }
25
26}
27

src/com.locales.Locales.java

1 package com.locales;
2
3 import java.util.Hashtable;
4 import java.util.Locale;
5 import java.util.Map;
6
7 /** */ /**
8 * @author ∪∩BUG E-mail: [email protected]
9 * @version Aug 23, 2008 11:27:29 PM
10 * @本地化
11 */
12 public class Locales

{
13    private Locale current;
14
15    // 设置当前用户的语言种类
16    public void setCurrent(Locale current)

{
17        this.current = current;
18    }
19
20    public Map<String, Locale> getLocales()

{
21        Map<String, Locale> locales = new Hashtable<String, Locale>();
22
23        // 往集合中装载语言种类
24        locales.put("USA English", Locale.US);
25        locales.put("Simplified Chinese", Locale.CHINA);
26        return locales;
27
28    }
29}
30

src/com.Login.LoginAction.java

1 package com.Login;
2
3 import com.opensymphony.xwork2.ActionContext;
4 import com.opensymphony.xwork2.ActionSupport;
5
6 /** */ /**
7 * @author ∪∩BUG E-mail: [email protected]
8 * @version Aug 23, 2008 8:39:58 PM
9 * @国际化
10 */
11 public class LoginAction extends ActionSupport

{
12    private String uname;
13    private String upass;
14
15    public LoginAction(String uname, String upass)

{
16        super();
17        this.uname = uname;
18        this.upass = upass;
19    }
20
21    public LoginAction()

{
22
23 }
24
25 public String getUname()

{
26        return uname;
27    }
28
29    public void setUname(String uname)

{
30        this.uname = uname;
31    }
32
33    public String getUpass()

{
34        return upass;
35    }
36
37    public void setUpass(String upass)

{
38        this.upass = upass;
39    }
40
41    @Override
42    public String execute() throws Exception

{
43
44 ActionContext ctx = ActionContext.getContext();// 获取struts2的整个上下文对象,这里是request
45 if ("admin".equals(this.uname) & "123".equals(this.getUpass()))

{
46//            ctx.getSession().put("user", this.getUname());     // 把当前的用户名放入session当中.
47//            ctx.put("tip", this.getText("succtip"));         // Action当中获取资源文件的方法,这里取的key名为succtip
48
49            //占位的资源文件的获取
50            ctx.getSession().put("user", this.getUname());     // 把当前的用户名放入session当中.
51            ctx.put("tip", this.getText("succtip",new String[]

{this.uname})); //在字符串数组中的第一个数组元素放入uname的值
52 } else

{
53// ctx.put("tip", this.getText("failtip")); // Action当中获取资源文件的方法,这里取的key名为failtip
54 ctx.put("tip", this.getText("failtip",new String[]

{this.uname})); //在字符串数组中的第一个数组元素放入uname的值
55        }
56
57        return SUCCESS;
58    }
59
60}
61

src/com.locales.LoginAction_en_US.properties

succtip =

{0} Login success
failtip =

{0} Login failed
msg =

{0} welcome,now is\:

{1}

src/com.locales.LoginAction_zh_CN.properties

1 succtip =

{0} \u767B\u5F55\u6210\u529F
2 failtip =

{0} \u767B\u5F55\u5931\u8D25
3 msg =

{0} \u6B22\u8FCE,\u73B0\u5728\u662F\:

{1}
4

src/globalMessages_en_US.properties

HelloWorld = Hello World\ !
com.locales = Test Locale

src/globalMessages_zh_CN.properties

HelloWorld = \u4F60\u597D,\u4E16\u754C\ !
com.locales = \u672C\u5730\u6D4B\u8BD5

src/struts.properties

struts.custom.i18n.resources = globalMessages

struts２.０学习笔记（四）－－I18n(国际化)

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