deleteaction.java

基于SSH (struts+spring+hibernate)框架设计的 CRM客户关系管理系统

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.csu.crm.common.action;

import java.io.IOException;

import javax.servlet.ServletException;
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 com.csu.crm.common.dao.SingleObjectDAO;
import com.csu.crm.common.vo.CrmAction;
import com.csu.crm.util.DeleteUtil;

/**
 * 删除表单记录
 * 必须传入参数: target---目标持久化类名 id------主键值
 * 
 * 删除表单记录的流程
 * 0、 判断传入参数是否符合要求（是否有传入参数，及是否在数据库中存在）
 * 1、 对传入的参数进入数据库查询,查询成功得到对应的contact对象后删除此对象
 * 例:
 * 	http://localhost:7076/3eCRM-SSH/delete.do?target=CrmCustomer&id=1
 * @author 3eCRM小组：曾东
 * @since 2007-9-30 下午04:06:19
 * @version 1.0 创建时间：2007-9-30 下午04:06:19,初始版本
 */
public class DeleteAction extends Action {
	private SingleObjectDAO singleObjectDAO;
	private DeleteUtil deleteUtil;
	public DeleteUtil getDeleteUtil() {
		return deleteUtil;
	}
	public void setDeleteUtil(DeleteUtil deleteUtil) {
		this.deleteUtil = deleteUtil;
	}
	public SingleObjectDAO getSingleObjectDAO() {
		return singleObjectDAO;
	}
	public void setSingleObjectDAO(SingleObjectDAO singleObjectDAO) {
		this.singleObjectDAO = singleObjectDAO;
	}
	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		/**
		 *  ######### 目标持久化类名 -- 主键名 --- 删除成功的页面路径
		 */

		//0
		//得到request参数
		String id = request.getParameter("id");
		String target = request.getParameter("target");
		if(id == null || target == null) {
			System.out.println("未指出id或target,将进入错误页面");
			request.setAttribute("errorInfo", "必须传入参数: target---目标持久化类名 id---主键值,不能进行对应信息的删除操作");
			return mapping.findForward("fail");
		}			
		
		//到Action操作表中找到对应的一些String参数
		CrmAction crmAction = (CrmAction)singleObjectDAO.getObject("CrmAction", "className", target);
		if(crmAction == null) {
			System.out.println("target输入错误");
			request.setAttribute("errorInfo", "传入参数错误: target---目标持久化类名,不能进行对应信息的删除操作");
			return mapping.findForward("fail");
		}
		String pkPropertyName = crmAction.getPkName();
		String path = crmAction.getQueryPath();
		
		//到数据库中查询对应对象
		if(!singleObjectDAO.isExisted(target, pkPropertyName, id)) {
			System.out.println("未找到对应的对象,将进入错误页面");
			request.setAttribute("errorInfo", "未找到"+target+"表的id为"+id+"的数据,请检查请求参数的target值及id值");
			return mapping.findForward("fail");
		}

		//1
		//查找成功则删除
		try{
			deleteUtil.delete(target, id);
		}catch(Exception e) {
			request.setAttribute("errorInfo", "删除失败,可能是数据库删除操作出错,请与数据库管理员联系");
			return mapping.findForward("fail");
		}
		
		
		//2
		//调用成功页面
		try {
			response.sendRedirect("query.do?target="+ target);
//			request.getRequestDispatcher("query.do?target="+ target).forward(request, response);
		} catch (Exception e) {			
			e.printStackTrace();
		}		
		
		return null;
	}
}