jsp 自学手册 - 新闻网

package com.action; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionForm; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.ActionForward; import com.actionForm.NewsForm; import org.apache.struts.actions.DispatchAction; import com.dao.ObjectDao; import com.tools.TimeShow; import java.io.UnsupportedEncodingException; import java.util.List; public class NewsAction extends DispatchAction { private ObjectDao<NewsForm> objectDao = null; // 后台：按新闻大类别的名称查询信息的Action public ActionForward queryNewsListAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); String bigSort = request.getParameter("bigSort"); bigSort = new String(bigSort.getBytes("ISO8859_1"), "gb2312"); String hql = "from NewsForm where bigSort='" + bigSort + "' order by id desc"; List list = objectDao.queryList(hql); request.setAttribute("list", list); return mapping.findForward("selectAllNews"); } // 后台：新闻添加的Action public ActionForward insertNewsAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); NewsForm newsForm = (NewsForm) form; newsForm.setShowNews(com.tools.TimeShow.autoNumber()); objectDao.saveT(newsForm); request.setAttribute("newsForm", newsForm); return mapping.findForward("resultNewsAction"); } // 后台： 对新闻的详细查询，转向修改页面Action public ActionForward selectOneNewsAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); int id = Integer.parseInt(request.getParameter("id")); String hql = "from NewsForm where id=" + id + ""; NewsForm newsForm = objectDao.queryFrom(hql); request.setAttribute("form", newsForm); return mapping.findForward("selectOneNewsAction"); } // 后台：对新闻的修改Action public ActionForward updateNewsAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { NewsForm newsForm = (NewsForm) form; objectDao = new ObjectDao<NewsForm>(); String hql = "from NewsForm where id=" + newsForm.getId() + ""; NewsForm nform = objectDao.queryFrom(hql); String filename = request.getRealPath("newsContent\\" + nform.getShowNews()); com.tools.FileOperation.deleteFile(filename); /** ************************************** */ newsForm.setShowNews(com.tools.TimeShow.autoNumber()); objectDao.updateT(newsForm); request.setAttribute("newsForm", newsForm); return mapping.findForward("resultNewsAction"); } // 后台：对新闻的删除Action public ActionForward deleteNewsAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); int id = Integer.parseInt(request.getParameter("id")); String hql = "from NewsForm where id=" + id + ""; NewsForm newsForm = objectDao.queryFrom(hql); objectDao.deleteT(newsForm); request.setAttribute("result", "新闻删除成功"); String filename = request.getRealPath("newsContent\\" + newsForm.getShowNews()); com.tools.FileOperation.deleteFile(filename); return mapping.findForward("resultNewsAction"); } // 后台：对新闻的详细查询 public ActionForward queryNewsFormAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); int id = Integer.parseInt(request.getParameter("id")); String hql = "from NewsForm where id=" + id + ""; NewsForm newsForm = objectDao.queryFrom(hql); request.setAttribute("form", newsForm); return mapping.findForward("queryNewsFormAction"); } // 前台：对新闻的查看 public ActionForward front_queryNewsAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); String hql = ""; String sign = request.getParameter("sign"); sign = new String(sign.getBytes("ISO8859_1"), "gb2312"); hql = "from NewsForm where bigSort = '" + sign + "'"; // 设置新闻类别的HQL语句 if (sign.equals("今日新闻")) // 对今日新闻的查询 { TimeShow timeShow = new TimeShow(); String currtime = timeShow.cuttentMonthDate(); hql = "from NewsForm where createTime = '" + currtime + "'"; } List list = objectDao.queryList(hql); request.setAttribute("list", list); return mapping.findForward("front_queryNewsAction"); } // 前台：对新闻关键字的查询 public ActionForward front_queryKeyNewsAction(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException { objectDao = new ObjectDao<NewsForm>(); String key = request.getParameter("key").trim(); String hql = "from NewsForm where (title like '%" + key + "%') or (content like '%" + key + "%')"; List list=objectDao.queryList(hql); request.setAttribute("list", list); return mapping.findForward("front_queryKeyNewsAction"); } }