新闻发布会
项目所需要的一些实现类 servlet 工具类
1.实现登录功能
前端界面的代码
1 <form action="<%=path %>/LonginServlet" method="post"> 2 <label> 登录名 </label> 3 <input type="text" name="uname" value=‘<%=request.getParameter("uname")==null?"":request.getParameter("uname") %>‘ class="login_input" /> 4 <label> 密  码 </label> 5 <input type="password" name="upwd" value=‘<%=request.getParameter("upwd")==null?"":request.getParameter("upwd") %>‘ class="login_input" /> 6 <input type="submit" class="login_sub" value="登录" /> 7 <label id="error"> </label> 8 <img src="images/friend_logo.gif" alt="Google" id="friend_logo" /> 9 </form>
登录实现类代码
1 public boolean loginGetBool(Admin admin) { 2 rs= executeSelect("select *from admin where name=? and \"pwd\"=?",admin.getAname(),admin.getApwd()); 3 try { 4 if(rs.next()){ 5 return true; 6 } 7 } catch (SQLException e) { 8 // TODO Auto-generated catch block 9 e.printStackTrace(); 10 } 11 return false; 12 }
登录servlet
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //接收请求时的编码utf-8 request.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); String name=request.getParameter("uname"); String pwd=request.getParameter("upwd"); Admin admin=new Admin(name,pwd); System.out.println(admin.getAname()); AdminDaoImpl adi=new AdminDaoImpl(); String dbn=adi.login(admin); if(dbn!=null){ Cookie cookie=new Cookie("unameCookie",name); cookie.setMaxAge(60*60*24); response.addCookie(cookie); System.out.println("登陆成功!"); HttpSession session= request.getSession(); session.setAttribute("uname", name); session.setMaxInactiveInterval(60*10); response.sendRedirect(request.getContextPath()+"/newspages/admin.jsp"); }else{ response.sendRedirect(request.getContextPath()+"/index.jsp"); } }
2.实现新增新闻
新增实现类方法
1 public boolean addNews(News news) { 2 Date date=new Date(); 3 DateFormat format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 4 Date time = null; 5 try { 6 time = format.parse(format.format(date)); 7 } catch (ParseException e) { 8 // TODO Auto-generated catch block 9 e.printStackTrace(); 10 } 11 12 Object[] obj={news.getNauthor(),news.getNcontent(),time,null,news.getNtitle(),news.getNtypeid()}; 13 14 15 16 return executeUpdate("INSERT INTO newsrecord (`nauthor`,`ncontent`,`startTime`,`endUpdateTime`,`ntitle`,`ntypeid`) values(?,?,?,?,?,?)",obj); 17 18 19 }
新增servlet
1 public void doPost(HttpServletRequest request, HttpServletResponse response) 2 throws ServletException, IOException { 3 4 request.setCharacterEncoding("utf-8"); 5 response.setContentType("text/html; charset=utf-8"); 6 //主题 7 int ntid=Integer.parseInt(request.getParameter("ntid")); 8 //标题 9 String ntitle=request.getParameter("ntitle"); 10 //作者 11 String nauthor=request.getParameter("nauthor"); 12 //摘要 13 String nsummary=request.getParameter("nsummary"); 14 //内容 15 String ncontent=request.getParameter("nauthor"); 16 //上传图片 17 18 19 String file=request.getParameter("file"); 20 NewsWeb news=new NewsWeb(nauthor,ncontent,file,ntitle,ntid,nsummary); 21 NewsWebDaoImpl nw=new NewsWebDaoImpl(); 22 23 if(nw.addNewsWeb(news)){ 24 System.out.print("成功!"); 25 request.getSession().setAttribute("xi", "<<script type=\"text/javascript\">+alert(\"新增新闻成功!\") </script>>"); 26 response.sendRedirect(request.getContextPath()+"/newspages/admin.jsp"); 27 // out.print(""); 28 }else{ 29 System.out.print("失败!"); 30 request.getSession().setAttribute("xi", "<<script type=\"text/javascript\">+alert(\"新增新闻失败!\") </script>>"); 31 response.sendRedirect(request.getContextPath()+"/newspages/admin.jsp"); 32 }
1 public void doPost(HttpServletRequest request, HttpServletResponse response) 2 throws ServletException, IOException { 3 TopicDaoImpl dao=new TopicDaoImpl(); 4 5 List<NewsType> alltopic=dao.getAllTopic(); 6 7 request.setAttribute("Topiclist", alltopic); 8 String data=request.getParameter("tid"); 9 10 if (data!=null&&!data.equals("")) { 11 int tid=Integer.parseInt(data); 12 13 NewDaoImpl topicdao=new NewDaoImpl(); 14 List<News> list = topicdao.getNewsById(tid); 15 16 request.setAttribute("newsList",list); 17 18 }else { 19 //处理新闻相关内容 20 NewDaoImpl newsDao=new NewDaoImpl(); 21 List<News> newsList = newsDao.getTopNews(); 22 request.setAttribute("newsList", newsList); 23 } 24 //转向DoIndexServlet获取数据 25 26 //准发到index.jsp 27 request.getRequestDispatcher("/index.jsp").forward(request, response); 28 }
动态显示实现类
1 public List<NewsType> getAllTopic() { 2 Connection connection=getConnection(); 3 String sqlString="select typeid,typename from type"; 4 QueryRunner query=new QueryRunner(); 5 List<NewsType> list=null; 6 try { 7 8 list=query.query(connection, sqlString, new BeanListHandler<NewsType>(NewsType.class)); 9 10 System.out.println(list.get(0).getTypeName()); 11 } catch (SQLException e) { 12 // TODO Auto-generated catch block 13 e.printStackTrace(); 14 } 15 return list; 16 } 17 18 19 public List<News> getTopNews() { 20 Connection connection=getConnection(); 21 QueryRunner query=new QueryRunner(); 22 //select * from newsrecord where rownum<=3 orcal查询前三条语句 23 String sqlString="select * from newsrecord where nid limit 3"; 24 List<News> list=null; 25 try { 26 list=query.query(connection, sqlString, new BeanListHandler<News>(News.class)); 27 } catch (SQLException e) { 28 // TODO Auto-generated catch block 29 e.printStackTrace(); 30 } 31 return list; 32 }
前端代码
1 <div class="content"> 2 <ul class="class_date"> 3 <li id=‘class_month‘> 4 <c:forEach var="item" items="${requestScope.Topiclist}"> 5 <a style="color:red;font-size:14px;" href=‘${pageContext.request.contextPath }/DoIndexServlet?tid=${item.typeid}‘><!-- 从域中取值 --> 6 ${item.typeName} 7 </a> 8 </c:forEach> 9 </li> 10 11 </ul> 12 <ul class="classlist"> 13 <c:forEach var="item" items="${newsList }"> 14 <li><a href=‘newspages/news_read.jsp‘>${item.ntitle }</a><span>${item.startTime } </span></li> 15 </c:forEach> 16 17 <p align="right"> 当前页数:[1/2] <a href="/DoIndexServlet">下一页</a> <a href="#">末页</a> </p> 18 </ul> 19 </div>
1 public void doPost(HttpServletRequest request, HttpServletResponse response) 2 throws ServletException, IOException { 3 4 request.setCharacterEncoding("utf-8"); 5 response.setContentType("text/html; charset=utf-8"); 6 String tname=request.getParameter("tname"); 7 NewsType newsType=new NewsType(tname); 8 NewsTypeDaoImpl ntdi=new NewsTypeDaoImpl(); 9 if (ntdi.addNewsType(newsType)) { 10 request.getSession().setAttribute("xi", "<<script type=\"text/javascript\">+alert(\"新增新闻类型成功!\") </script>>"); 11 }else{ 12 System.out.println(""); 13 request.getSession().setAttribute("xi", "<<script type=\"text/javascript\">+alert(\"新增新闻类型失败!\") </script>>"); 14 } 15 response.sendRedirect("/news/util/addnewstype.jsp"); 16 17 }
新增类型实现类
1 public boolean addNewsType(NewsType newsType){ 2 return executeUpdate("insert into type(typename) 3 values(?)", newsType.getTypeName()); 4 }
原文：http://www.cnblogs.com/PGYXZ/p/4996244.html
