accountsearchaction.java

我在加拿大学习的一个比较复杂的在线银行程序.

package com.ebusiness.ebank.action;

/**
 * <p>Title: AccountSearchAction </p>
 * <p>Description: Search all accounts for the cardholder </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: eBusiness Inc., All right reserved</p>
 * @author unascribed
 * @version 1.0
 */

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionMessages;
import org.apache.log4j.Logger;
import org.apache.log4j.MDC;
import org.apache.struts.Globals;
import org.apache.struts.Globals;

import com.ebusiness.ebank.form.AccountForm;
import com.ebusiness.ebank.bean.ValueList;
import com.ebusiness.ebank.servicedelegate.AccountAccessDelegate;
import com.ebusiness.ebank.exception.BusinessException;
import com.ebusiness.ebank.exception.SystemException;
import com.ebusiness.ebank.util.Constants;

public class AccountSearchAction extends Action
{
    Logger log = Logger.getLogger(this.getClass());

    public ActionForward execute(ActionMapping mapping,
                                 ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response) throws Exception
    {
        HttpSession session = request.getSession(false);
        Locale locale = (Locale)session.getAttribute(Globals.LOCALE_KEY);

        MDC.put("userid", request.getRemoteUser());

        // defalut forward page
        String forward = "failure" ;

        AccountForm accountForm = (AccountForm)form;
        String action = accountForm.getAction() ;
        log.debug(" action is " + action) ;

        if (("clear").equals(action))
        {
           session.removeAttribute(Constants.ACCOUNT_FORM);
           return mapping.findForward("clear");
        }

        ActionErrors errors = (ActionErrors)accountForm.validate(mapping,request);

        if (errors == null) errors = new ActionErrors() ;

        if (errors.isEmpty()) //passed basic validation
        {
            try
            {
                ValueList vList = AccountAccessDelegate.searchAccount(accountForm.getClientCardID());
                session.setAttribute(Constants.ACCOUNT_LIST, vList.getSearchResults());
                forward = "result"; //forward to Account list page
            }
            catch (SystemException e)
            {
                 log.error(e.getMessage(),e) ;
                 forward = "error" ;
            }
            catch (BusinessException e)
            {
                  errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("errors.businessException",e.getMessage(locale)));
                  saveErrors(request,errors);
            }
        }
        else
            saveErrors(request,errors);
        return mapping.findForward(forward);
    }
}