responseinsertaction.java

J2EE电子商务系统开发从入门到精通---基于Struts和Hibernate技术实现

/*
 * ResponseInsertAction.java
 *
 * Created on 2006年6月15日, 上午3:48
 */

package action.bbs;

import dbservice.hibernate.HibernateService;
import form.bbs.ResponseForm;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.bbs.hibernate.*;
import model.hr.hibernate.Employee;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
/**
 *
 * @author Administrator
 * @version
 */

public class ResponseInsertAction extends Action {
    
    /* forward name="success" path="" */
    private final static String SUCCESS = "success";
    
    /**
     * This is the action called from the Struts framework.
     * @param mapping The ActionMapping used to select this instance.
     * @param form The optional ActionForm bean for this request.
     * @param request The HTTP Request we are processing.
     * @param response The HTTP Response we are processing.
     * @throws java.lang.Exception
     * @return
     */
    public ActionForward execute(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // 从用户Http请求中得到参数employeeid的值，即当前的员工编号
        String employeeId = request.getParameter("employeeid");
        // 从用户Http请求中得到参数articleid的值，即当前的文章编号
        String articleId = request.getParameter("articleid");
        
        // 获得页面表单中用户输入的信息
        ResponseForm insertForm = (ResponseForm)form;
        Articleresponse articleresponse = new Articleresponse();
        articleresponse.setContent(insertForm.getContent());
        articleresponse.setPresstime(new Date().toString());
        
        // 根据用户表单输入信息、员工编号和当前文章编号，向数据库中插入一条文章回复信息
        boolean isSuccess = ArticleresponseUtil.insert(employeeId, articleId, articleresponse);
        if (isSuccess == false) {
            return new ActionForward(mapping.getInput());
        }
        
        // 执行hql语句，读取编号为articleId的文章的所有回复信息
        List list = HibernateService.execQuery("from Articleresponse response where response.article.id=" + articleId);
        if (list == null) {
            return new ActionForward(mapping.getInput());
        }
        
        // 获得HttpSession缓存
        HttpSession httpSession = request.getSession();
        // 将符合条件的所有回复信息存入缓存
        httpSession.setAttribute("articleresponselist", list);
        return mapping.findForward(SUCCESS);        
    }
}