0.遇到的問題(這些問題也許不會同時出現)
a.中文數據從數據庫中到jsp中后就變成了"????"
b.做好的中文properties文件，其中的中文value在頁面顯示亂碼
c.jsp文件中的中文到瀏覽器后顯示時也是亂碼（建議不要在jsp文件中輸入中文，盡量放在properties文件中）
d.由jsp傳給bean的中文值，再由bean傳回頁面又是亂碼
e.當更換本地瀏覽器的語言選項時，Web應用程序不能自動根據你的locale選擇合適的*.properties文件。導致Web應用程序不能國際化。

1.環境：
Web服務器： Tomcat 5.0.19
操作系統： Win2000 Server
JVM ： jdk 1.4
數 據 庫： Oracle 8.1.7
開發工具： struts studio 5.2 pro for eclipse

2.先將所有*.jsp 網頁中開頭處加入
<%@ page language="java" contentType="text/html; charset=utf-8" %>
再設置<html:html locale = "true">

3.然后編輯好兩個*.properties文件，放在classes文件夾下你指定的地方，這里是放在/web-inf/classes/com/wiley 下，它們分別是：
ApplicationResources.properties (英文資源文件)
ApplicationResources_zh.properties (中文資源文件)
隨便用什么工具編寫都行啊！

4.將ApplicationResources_zh.properties轉碼成gb2312。上面引文說要轉成UTF-8，結果我試了，不行。轉成gb2312就行了，操作是。
將ApplicationResources_zh.properties更名為ApplicationResources_xx.properties
在DOS命令行進入ApplicationResources_xx.properties所在的文件夾
使用命令：native2ascii -encoding gb2312 ApplicationResources_xx.properties

ApplicationResources_zh.properties(至于你為什么會出現“native2ascii不是內部命令”，請查其它資料，可能你要設置環境變量，因為他是jdk的文件夾bin下的一個應用程序)

5.接下來配置struts-config.xml,很簡單，我們加入：
<message-resources parameter="com.wiley.ApplicationResources"/> 就行了；

到此已能解決大多數中文問題。如上面所說的a,b,e 現在打開瀏覽器，選擇菜單：工具》internet選項》

語言，將“中文－中國[zh-cn]”刪掉，添加一個“英語－英國[zh-gb]”確定后，重啟Tomcat,輸入網址你就會發現，你的頁面的文本信息就會用的是ApplicationResources.properties (英文資源文件)中的內容。如果換回“中文－中國[zh-cn]”，它就會顯示ApplicationResources_zh.properties (中文資源文件)中的中文內容。

至于問題“c.jsp文件中的中文到瀏覽器后顯示時也是亂碼” 你就要用與第4步類似的方法來重新對*.jsp 文件編碼，這時-encoding的參數就要用UTF-8了，如果你用的也是struts studio 5.2 pro for eclipse工具，這一步就免了。它會自動用UTF-8的格式存儲。
至于問題“d.由jsp傳給bean的中文值，再由bean傳回頁面又是亂碼”的解決，我只是加了個過濾器。
你可以現在web.xml中加入：

<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>com.wiley.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>ignore</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<servlet-name>action</servlet-name>
</filter-mapping>

然后在你指定的包內加個java文件 我放在了/web-inf/classes/com/wiley 里，下面是源代碼：
/*
* XP Forum
*
* Copyright (c) 2002-2003 RedSoft Group. All rights reserved.
*
*/
package com.huahang.tj.struts.filters;

import javax.servlet.*;
import java.io.IOException;

/**
* <p>Filter that sets the character encoding to be used in parsing the
* incoming request, either unconditionally or only if the client did not
* specify a character encoding. Configuration of this filter is based on
* the following initialization parameters:</p>
* <ul>
* <li><strong>encoding</strong> - The character encoding to be configured
* for this request, either conditionally or unconditionally based on
* the <code>ignore</code> initialization parameter. This parameter
* is required, so there is no default.</li>
* <li><strong>ignore</strong> - If set to "true", any character encoding
* specified by the client is ignored, and the value returned by the
* <code>selectEncoding()</code> method is set. If set to "false,
* <code>selectEncoding()</code> is called <strong>only</strong> if the
* client has not already specified an encoding. By default, this
* parameter is set to "true".</li>
* </ul>
*
* <p>Although this filter can be used unchanged, it is also easy to
* subclass it and make the <code>selectEncoding()</code> method more
* intelligent about what encoding to choose, based on characteristics of
* the incoming request (such as the values of the <code>Accept-Language</code>
* and <code>User-Agent</code> headers, or a value stashed in the current
* user′s session.</p>
*
* @author <a href="mailto:jwtronics@yahoo.com">John Wong</a>
*
* @version $Id: SetCharacterEncodingFilter.java,v 1.1 2002/04/10 13:59:27 johnwong Exp $
*/
public class SetCharacterEncodingFilter implements Filter {

// ----------------------------------------------------- Instance Variables

/**
* The default character encoding to set for requests that pass through
* this filter.
*/
protected String encoding = null;

/**
* The filter configuration object we are associated with. If this value
* is null, this filter instance is not currently configured.
*/
protected FilterConfig filterConfig = null;

/**
* Should a character encoding specified by the client be ignored?
*/
protected boolean ignore = true;

// --------------------------------------------------------- Public Methods

/**
* Take this filter out of service.
*/
public void destroy() {

this.encoding = null;
this.filterConfig = null;

}

/**
* Select and set (if specified) the character encoding to be used to
* interpret request parameters for this request.
*
* @param request The servlet request we are processing
* @param result The servlet response we are creating
* @param chain The filter chain we are processing
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {

// Conditionally select and set the character encoding to be used
if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
}

// Pass control on to the next filter
chain.doFilter(request, response);

}

/**
* Place this filter into service.
*
* @param filterConfig The filter configuration object
*/
public void init(FilterConfig filterConfig) throws ServletException {

this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if (value == null)
this.ignore = true;
else if (value.equalsIgnoreCase("true"))
this.ignore = true;
else if (value.equalsIgnoreCase("yes"))
this.ignore = true;
else
this.ignore = false;

}

// ------------------------------------------------------ Protected Methods

/**
* Select an appropriate character encoding to be used, based on the
* characteristics of the current request and/or filter initialization
* parameters. If no character encoding should be set, return
* <code>null</code>.
* <p>
* The default implementation unconditionally returns the value configured
* by the <strong>encoding</strong> initialization parameter for this
* filter.
*
* @param request The servlet request we are processing
*/
protected String selectEncoding(ServletRequest request) {

return (this.encoding);

}

}//EOC
到此我遇到的中文問題已全部得到解決，并從中理解到struts的國際化的深刻含義。
我個人覺得struts作為一個功能強大的應用框架，應該早就考慮到它的國際化問題，并在實際應用中不會很復雜，只要我們遵循一些規則，就可以盡情享受struts給我們帶來的無窮樂趣。希望以上所述對大家有所幫助。??