リッチクライアント技術におけるJavaScriptスクリプトの国際化

import java.util.Enumeration; 
import java.util.HashMap; 
import java.util.Locale; 
import java.util.ResourceBundle; 

import net.sf.json.JSONObject; 

/** *//** 
*                      ，        JSON     ，               ， 
*           。        Spring        ， bean              ，     
*              
* 
*  * @author    
*/ 

public class HierarchicalMessage { 
    /** *//**         */ 
    private String bundleName; 
    /** *//**          */ 
    private String prefix; 
    /** *//**         */ 
    private HashMap<String, JSONObject> cachingMap = new HashMap<String, JSONObject>(); 
    
    /** *//**            */ 
    public void setBundleName(String bundleName) { 
        this.bundleName = bundleName; 
    } 

    /** *//**           */ 
    public void setPrefix(String prefix) { 
        this.prefix = prefix; 
    } 

    /** *//**            ，（     ，         ）*/ 
    public JSONObject getMessagesWithPrefix(Locale localeName){ 
        return getMessagesWithPrefix(this.bundleName,this.prefix,localeName); 
    } 
    
    /** *//** 
     *                      ，        JSON      
     * */ 
    public JSONObject getMessagesWithPrefix(String bundleName, String prefix, Locale localeName){ 
        JSONObject toReturn; 
        //            ：i18n/messages$page.login$zh_CN 
        String cachingString = new StringBuilder().append(bundleName).append("$"). 
                                append(prefix).append("$").append(localeName.toString()).toString(); 
        toReturn = cachingMap.get(cachingString); 
        if(toReturn != null){ 
            return toReturn; 
        } 
        
        toReturn = new JSONObject(); 
        
        //      ，  Java          
        ResourceBundle rb = ResourceBundle.getBundle(bundleName, localeName); 
        
        Enumeration<String> e = rb.getKeys(); 
        String keyRef = null; 
        String componentPrefix = new StringBuilder().append(prefix).append(".").toString(); 
        int shortNameStartIndex = prefix.length() + 1; 
        while(e.hasMoreElements()){ 
            keyRef = e.nextElement(); 
            if(keyRef.startsWith(componentPrefix)){ 
                toReturn.put(keyRef.substring(shortNameStartIndex), rb.getString(keyRef)); 
            } 
        } 
        
        cachingMap.put(cachingString, toReturn); 
        
        return toReturn; 
} 
} 

 import java.io.IOException; 
import java.io.PrintWriter; 

import javax.servlet.ServletException; 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 

import org.springframework.web.context.WebApplicationContext; 
import org.springframework.web.context.support.WebApplicationContextUtils; 

import HierarchicalMessage; 

public class I18nServlet extends HttpServlet { 
    /** *//** 
     *             JavaScript   
     * 
     * @param request the request send by the client to the server 
     * @param response the response send by the server to the client 
     * @throws ServletException if an error occurred 
     * @throws IOException if an error occurred 
     */ 
    public void doGet(HttpServletRequest request, HttpServletResponse response) 
            throws ServletException, IOException { 
        
        response.setContentType("application/json"); 
        response.setCharacterEncoding("UTF-8"); 
        
        PrintWriter out = response.getWriter(); 
        
        HierarchicalMessage hm = getHierarchicalMessage(); 
        hm.setPrefix(new StringBuilder().append("page.").append(getBizId(request)).toString()); 
        //   session             
        String json = hm.getMessagesWithPrefix(request.getLocale()).toString(); 
        
        out.print(new StringBuilder().append("var msg=").append(json).append(";")); 
        out.close(); 
    } 

    private HierarchicalMessage getHierarchicalMessage() { 
        WebApplicationContext wc = WebApplicationContextUtils 
                                     .getWebApplicationContext(getServletContext()); 
        HierarchicalMessage hm = (HierarchicalMessage)wc.getBean("msgBean"); 
        return hm; 
    } 

    private String getBizId(HttpServletRequest request) { 
        StringBuffer urlString = request.getRequestURL(); 
        int start = urlString.lastIndexOf("/") + 1; 
        int end = urlString.lastIndexOf("."); 
        return urlString.substring(start, end); 
    } 

} 

<bean id="msgBean" class="HierarchicalMessage" scope="singleton"> 
        <property name="bundleName"> 
            <value>i18n/messages</value> 
        </property> 
        <property name="prefix"> 
            <value>sys</value> 
        </property> 
</bean>

<servlet> 
      <servlet-name>I18nServlet</servlet-name> 
      <servlet-class>I18nServlet</servlet-class> 
    </servlet> 
    <servlet-mapping> 
      <servlet-name>I18nServlet</servlet-name> 
      <url-pattern>/i18n/*</url-pattern> 
</servlet-mapping>