realqueryaction.java

eclipse java/jsp 航空管理系统

/*
 * Copyright Neusoft Dalian Center,All Rights Reserved
 *
 * WEB Application Apply Struts Platform
 * 
 * PackageName shengjb.form
 * ClassName RealQueryAction.java
 *
 * @author shengjb  | [e-mail]
 *
 * Created on 2005-4-23
 *
 */

package shengjb.action;

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

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 shengjb.form.RealQueryForm;
import shengjb.model.RealQueryBean;
import zhangchunliang.model.AppMode;

/**
 * RealQueryAction ActionClass
 * 
 * @author shengjb ver.0.7
 */
public class RealQueryAction extends Action{
	
	/**
	 * Process the specified HTTP request, and create the corresponding HTTP
	 * response (or forward to another web component that will create it), with
	 * provision for handling exceptions thrown by the business logic. Return an
	 * {@link ActionForward}instance describing where and how control should be
	 * forwarded, or <code>null</code> if the response has already been
	 * completed.
	 * 
	 * @param mapping
	 * The ActionMapping used to select this instance
	 * @param form
	 * The optional ActionForm bean for this request (if any)
	 * @param request
	 * The HTTP request we are processing
	 * @param response
	 * The HTTP response we are creating
	 * @exception Exception
	 * if the application business logic throws an exception
	 * @since Struts 1.1
	 */
    public ActionForward execute(ActionMapping mapping, 
    		                          ActionForm form, 
    		                          HttpServletRequest request,
                                      HttpServletResponse response)
    throws Exception {
    	
		if(!AppMode.getAppMode()){
			System.out.println("Application is terminated...");
			return mapping.findForward("appInfo");
		}
    	
    	/*获得表单里的用户输入的要查询的名字*/
    	String queryName = request.getParameter("queryName");
   	
   	    /*Form对象实例化 */
    	RealQueryForm realQueryForm = (RealQueryForm)form;
   	    
   	    /* 把变量的值SET到FORM中*/
   	    realQueryForm.setQueryName(queryName);
        
    	RealQueryBean realQueryBean = new RealQueryBean();
    	
    	/*定义StringBuffer变量，并用RealQueryBean中的方法的返回值赋值，最后在JSP中动态的显示此变量*/
    	StringBuffer querydisplayall = realQueryBean.querydisplayall(realQueryForm);
    	
    	/*把生成的动态列表Set到request中去,通过JSP页面GET出来*/
		request.setAttribute("querydisplayall", querydisplayall);
		
		/*实现跳转到查询一览页*/
    	return (mapping.findForward("querydisplayallsuccess"));
    }  	
}