# org/rpd/i18n/bundles/Messages.properties - Resource Bundle for default locale# The sample message key-value pairs...error.loginid.required = User Name is Mandatory.error.useremail.required = Email Id is Mandatory.error.password.required = Password is required.error.password.length = Password Length should not be less than six(6)character.error.confirmpassword.required = Confirm Password is required.error.passwordconfirm.match = Password and Confirm Password does not match.error.firstName.required = First Name is required.error.lastName.required = Last Name is required.          

package org.rpd.i18n.common;

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

public class ResourceManager {     // The name and location of the resource bundle.     private final String mMessageBundle = "org/rpd/i18n/bundles/Messages";

     // The loaded message cache...     private Map<Locale, ResourceBundle> mResourceCache = null;

     // Private instance variable.     private static ResourceManager mManager = null;

     // default private constructor.     private ResourceManager(){          mResourceCache = new HashMap<Locale, ResourceBundle>();     }

     // Get the locale-specific bundle from cache. // First load to the cache if not already loaded     public ResourceBundle getBundle(Locale locale){          if(locale == null){               locale = Locale.getDefault();          }          if(mResourceCache.containsKey(locale) == false){               ResourceBundle bundle = ResourceBundle.getBundle(mMessageBundle, locale);               mResourceCache.put(locale, bundle);          }          return mResourceCache.get(locale);     }

     // Thread safe Singleton pattern implementation...      private static ResourceManager getInstance(){          synchronized (ResourceManager.class) {               if(mManager == null){                    mManager = new ResourceManager();               }          }          return mManager;     }

     // Get the message for the key using default locale.     public static String getMessage(String key){          return getMessage(key, null);     }

     // Get the message for the key and specified locale.     public static String getMessage(String key, Locale locale){          try{               return getInstance().getBundle(locale).getString(key);          }catch(Exception e){               return "";          }     }}             

<%@page import="org.rpd.i18n.common.ResourceManager"%><%   // The name of the request parameter representing the input    // "HTML Element - Message Key" combination.   final String REQ_ID = "message-key";   // Message prefix to be used in output string.   final String MSG_PREFIX = "begin::";   // Message suffix to be used in output string.   final String MSG_SUFFIX = "::end";   // The standard "HTML Element - Message Key" delimiter.   final String ELEMENT_KEY_DELIM = ",";   // The "HTML Element - Localize Message" delimiter to be used in    // output string.   final String KEY_VAL_DELIM = "==";

   // Find the request parameter containing the "HTML Element - Message Key"    // combination String.   String keysArr = request.getParameter(REQ_ID);   // If the desired request parameter doesn't exist, it means request is invalid.   if(keysArr == null){        out.println("Invalid message key");   } else {        // Split the input using the element - key delimiter (ELEMENT_KEY_DELIM).        String keys[] = keysArr.split(ELEMENT_KEY_DELIM);        // Check if the number of tuples is even. If not, it means the input is incorrect.        if((keys.length%2) != 0){      out.println("Improper elem-key combination: " + keysArr);        } else {      // Iterate through each elem-key combination.       for(int i=0; i < keys.length; i = i + 2){           // Retrieve the localized message against the key. Prepare the result string            // as follows:            // Message Prefix (followed by) HTML Element key (followed by) Key-value            // delimiter            // (followed by) Localized value (followed by) Message suffix.            out.println(MSG_PREFIX + keys[i].trim() + KEY_VAL_DELIM +              ResourceManager.getMessage(keys[i+1].trim(), request.getLocale()) +              MSG_SUFFIX);      }        }   }%>     

var xmlHttp = null;var msgKeys = new Array();var msgPrefix = "begin::";var msgSuffix = "::end";var msgDelimiter = "==";var jspURL = "MessageResolver.jsp";

// reset msgKeys array.function resetMsgKeys(){     msgKeys = new Array();}// Adding to the array of keysfunction addMsgKey(elemId, msgKey) {     msgKeys[msgKeys.length] = new Array();     msgKeys[msgKeys.length - 1][0] = elemId;     msgKeys[msgKeys.length - 1][1] = msgKey;     document.getElementById(elemId).innerText = "";}

//Different browsers use different methods to create XMLHttpRequest objects.

function getXmlHttpObject() {     xmlHttp = null;     try {                // Firefox, Opera 8.0+, Safari       xmlHttp = new XMLHttpRequest();     }     catch (e) {    // Internet Explorer       try {        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");   }   catch (e) {        try {      xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");        }        catch (e) {      alert("Your browser does not support Ajax!");      return false;        }   }     }     return xmlHttp;}

//To pass on the key to the JSP function getMessage(key) {     // checking for browser support     xmlHttp = getXmlHttpObject();     if (xmlHttp == null) {   alert("Browser does not support Ajax");   return false;     }     var url = jspURL + "?message-key=" + key;     xmlHttp.onreadystatechange = displayMessage;     xmlHttp.open("GET", url, true);     xmlHttp.send(null);}

//Response generated against the requestfunction displayMessage() {     if (xmlHttp.readyState == 4 || xmlHttp.readyState == "complete") {   var localizedMsg = xmlHttp.responseText;   while (true) {        var begInd = localizedMsg.indexOf(msgPrefix);        var endInd = localizedMsg.indexOf(msgSuffix);        if (begInd < 0 || endInd < 0) {      break;        }        var msg = localizedMsg.substring((begInd + msgPrefix.length), endInd);        var elemVal = msg.split(msgDelimiter);        document.getElementById(elemVal[0]).innerText       = document.getElementById(elemVal[0]).innerText + "**" + elemVal[1];        localizedMsg = localizedMsg.substring(endInd + msgSuffix.length);   }     }}        

<%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>   <head>      <title>New User Registration</title>      <script type="text/javascript" src="ValidateNewUser.js"> </script>      <script type="text/javascript" src="MessageDisplay.js"> </script>   </head>   <body>      <form οnsubmit="return validateNewUser();" name="frmRegistration"          id="frmRegistration" action="#" method="post">         <table border="0" width="100%">            <tbody>               <tr>                  <td align="right" nowrap="nowrap">&nbsp;Email ID</td>                  <td align="center">:</td>                  <td><input type="text" name="emailId" id="emailId" size="20"></td>                  <td width="100%"><p id="emailErrMsg"></p></td>               </tr>               <tr>                  <td align="right" nowrap="nowrap">User Name</td>                  <td align="center">:</td>                  <td><input type="text" name="loginId" id="loginId" size="20"></td>                  <td width="100%"><p id="loginErrMsg"></p></td>               </tr>               <tr>                  <td align="right" nowrap="nowrap">Password</td>                  <td align="center">:</td>                  <td><input type="password" name="password" id="password"                         size="20" ></td>                  <td width="100%"><p id="passwordErrMsg"></p></td>               </tr>               <tr>                  <td align="right" nowrap="nowrap">Confirm Password</td>                  <td align="center">:</td>                  <td><input type="password" name="confirmPassword"                        id="confirmPassword" size="20"></td>                  <td width="100%"><p id="confirmpassErrMsg"></p></td>               </tr>               <tr>                  <td align="right" nowrap="nowrap">First Name</td>                  <td align="center">:</td>                  <td><input type="text" name="firstName" id="firstName" size="20"></td>                  <td width="100%"><p id="firstNameErrMsg"></p></td>               </tr>               <tr>                  <td align="right" nowrap="nowrap">Last Name</td>                  <td align="center">:</td>                  <td><input type="text" name="lastName" id="lastName" size="20"></td>                  <td width="100%"><p id="lastNameErrMsg"></p></td>               </tr>               <tr>                  <td colspan="4" align="center">                        <input type="submit" name="cmdSubmit" value="Submit">                  </td>               </tr>            </tbody>         </table>      </form>   </body></html>      

function validateNewUser() {     resetMsgKeys();     document.getElementById("loginErrMsg").innerText = "";     document.getElementById("emailErrMsg").innerText = "";     document.getElementById("passwordErrMsg").innerText = "";     document.getElementById("confirmpassErrMsg").innerText = "";     document.getElementById("firstNameErrMsg").innerText = "";     document.getElementById("lastNameErrMsg").innerText = "";

     if (document.frmRegistration.loginId.value == "") {          addMsgKey("loginErrMsg", "error.loginid.required");     }     if (document.frmRegistration.emailId.value == "") {          addMsgKey("emailErrMsg", "error.useremail.required");

     if (document.frmRegistration.password.value == "") {          addMsgKey("passwordErrMsg", "error.password.required");     } else {          if (document.frmRegistration.password.value.length < "6") {               addMsgKey("passwordErrMsg", "error.password.length");          }     }     if (document.frmRegistration.confirmPassword.value == "") {          addMsgKey("confirmpassErrMsg", "error.confirmPassword.required");     } else {          if (document.frmRegistration.confirmPassword.value !=                document.frmRegistration.password.value) {               addMsgKey("confirmpassErrMsg", "error.passwordconfirm.match");          }     }     if (document.frmRegistration.firstName.value == "") {          addMsgKey("firstNameErrMsg", "error.firstName.required");     }     if (document.frmRegistration.lastName.value == "") {          addMsgKey("lastNameErrMsg", "error.lastName.required");     }     if (msgKeys.length > 0) {          getMessage(msgKeys);          return false;     }     return true;}                

Ritesh Prasad 是位于印度 Bangalore 的 Rational Application Developer 开发团队的一员。他具有 Indian Institute of Technology 的 Industrial Engineering and Management 专业的技术硕士学位并曾先后在几个 Web 应用程序开发项目中担任过 Java/J2EE 程序员。Ritesh 还从事过基于 J2EE 的 CRM Framework 方面的工作，比如 Chordiant 和 Eiphany，并有幸成为了 IBM India 接触 Epiphany 的第一人。在工作之外，Ritesh 喜欢与家人在一起和欣赏音乐。