如何在JAVA STRUTS2中從java類訪問另一個STATIC變量？

Question

我想從一個Java類訪問靜態變量到另一個，但沒有得到價值！

下面是我的java類。

靜態內容，類1：

package com.globalProperties; 
public class GlobalVariables { 

static{ 
    someFunctionName(); 
} 

    private static String SMTP_SERVER = ""; 
    private static String SMTP_USERNAME = ""; 
    private static String SMTP_PASSWORD = ""; 

    private static void someFunctionName(){ 
     Connection con = null; 
     Statement statement = null; 
     ResultSet resultset = null; 
     LinkedHashMap<String,String> sysParmHashMap = new LinkedHashMap<String, String>(); 
      con = DatabaseConnection.getDbConnection(); 
      statement = con.createStatement(); 
      String queryStr = "SELECT * FROM SMTPCONNECTION"; 
      resultset = statement.executeQuery(queryStr); 
      while(resultset.next()){ 
       sysParmHashMap.put(resultset.getString("KEY"), resultset.getString("KEY_VALUE")); 
      } 

       // First i tried this to set value 
       SMTP_SERVER = sysParmHashMap.get("SMTP_SERVER").trim(); 
       SMTP_USERNAME = sysParmHashMap.get("SMTP_USERNAME").trim(); 
       SMTP_PASSWORD = sysParmHashMap.get("SMTP_PASSWORD").trim(); 

       // Second time, i tried this to set value 
       setSMTP_SERVER(sysParmHashMap.get("SMTP_SERVER").trim()); 
       setSMTP_USERNAME(sysParmHashMap.get("SMTP_USERNAME").trim()); 
       setSMTP_PASSWORD(sysParmHashMap.get("SMTP_PASSWORD").trim()); 


       System.out.println("SMTP_SERVER :" +SMTP_SERVER); 
       System.out.println("SMTP_USERNAME :" +SMTP_USERNAME); 
       System.out.println("SMTP_PASSWORD :" +SMTP_PASSWORD); 
     } 

    public static String getSMTP_SERVER() { 
     return SMTP_SERVER; 
    } 

    public static void setSMTP_SERVER(String sMTP_SERVER) { 
     SMTP_SERVER = sMTP_SERVER; 
    } 

    public static String getSMTP_USERNAME() { 
     return SMTP_USERNAME; 
    } 

    public static void setSMTP_USERNAME(String sMTP_USERNAME) { 
     SMTP_USERNAME = sMTP_USERNAME; 
    } 

    public static String getSMTP_PASSWORD() { 
     return SMTP_PASSWORD; 
    } 

    public static void setSMTP_PASSWORD(String sMTP_PASSWORD) { 
     SMTP_PASSWORD = sMTP_PASSWORD; 
    } 

    public static String getGATEWAY_SERVICE_URL() { 
     return GATEWAY_SERVICE_URL; 
    } 

} 

在這裏，我想接取那些靜態變量2類：

package com.unilog.sendMails; 
import com.globalProperties.GlobalVariables; 
improt .... some imports ....; 

public class sendEmailTo extends ActionSupport implements ServletResponseAware { 


    public String MailContact(){ 

     String result = "Fail"; 

    if(Some condition){ 
     result = sendingEmail( -- Parameters --); 
     } 



    } 

    public String sendingEmail(String toAddress,String fromAddress,String mailSubject,String mailBody){ 
     String result="FAIL"; 

     // For Below variable am not getting any value they are Empty but not null 
      String smtpHost = GlobalVariables.getSMTP_SERVER(); 
      final String smtpUserName = GlobalVariables.getSMTP_USERNAME(); 
     final String smtpPassword = GlobalVariables.getSMTP_PASSWORD(); 

    } 
} 

Answer 1

問題解決了，我被分配VARIABLE =""（用於聲明靜態變量空值時間）

原來是：

private static String SMTP_SERVER = ""; 
    private static String SMTP_USERNAME = ""; 
    private static String SMTP_PASSWORD = ""; 

它被假設是這樣的：

private static String SMTP_SERVER; 
    private static String SMTP_USERNAME; 
    private static String SMTP_PASSWORD; 

現在，它的做工精細......

謝謝.....