留言板源码

package Servlet; import java.util.List; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import Factory.FactoryDao; import bean.PageCount; import valuebean.Note; @WebServlet("/NoteServlet") public class NoteServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); if (request.getSession().getAttribute("user") == null) { response.getWriter().print("<script>location.href='login.jsp'</script>"); return; } String type = request.getParameter("type"); if (type == null) { select(request, response); } else if (type.equals("delete")) { delete(request, response); } else if (type.equals("add")) { add(request, response); } else if (type.equals("update")) { update(request, response); } else if (type.equals("update_do")) { updateDo(request, response); } } private void update(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String id = request.getParameter("noteId"); Note note = FactoryDao.getNoteDaoInstance().seleteSingle(id); request.getSession().setAttribute("updateNote", note); try { response.sendRedirect("updatenote.jsp"); } catch (IOException e) { e.printStackTrace(); } } private void add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String title=request.getParameter("notetitle"); title=new String(title.getBytes("ISO-8859-1"),"utf-8"); String content=request.getParameter("notecontent"); content=new String(content.getBytes("ISO-8859-1"),"uft-8"); String personName=(String)request.getSession().getAttribute("user"); if(FactoryDao.getNoteDaoInstance().addNote(title, content, personName)){ response.getWriter().print("<script>alert('添加成功')；</script>"); }else{ response.getWriter().print("<script>alert('添加失败')；</script>"); } response.getWriter().print("<script>location.href='/zcg246/Note'</script>"); } private void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { int id = Integer.parseInt(request.getParameter("noteId")); if (FactoryDao.getNoteDaoInstance().deleteNote(id)) { response.getWriter().print("<script>alert('删除成功')；</script>"); } else { response.getWriter().print("<script>alert('删除失败')；</script>"); } response.getWriter().print("<script>location.href='/zcg246/Note'</script>"); } private void select(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String page = request.getParameter("page"); if (page == null) page = "1"; List list = FactoryDao.getNoteDaoInstance().selectAll(); PageCount pageCount = new PageCount(list, 2); list = pageCount.getPageList(Integer.parseInt(page)); request.setAttribute("noteList", list); request.setAttribute("pageCount", pageCount.getPageCount()); request.getRequestDispatcher("note_list.jsp").forward(request, response); } private void updateDo(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String noteId = request.getParameter("noteId"); String title = request.getParameter("notetitle"); title = new String(title.getBytes("ISO-8859-1"), "utf-8"); String content = request.getParameter("notecontent"); content = new String(content.getBytes("ISO-8859-1"), "utf-8"); String personName = (String) request.getSession().getAttribute("user"); if (FactoryDao.getNoteDaoInstance().updateNote(title, content, noteId)) { response.getWriter().print("<script>alert('修改成功');</script>"); } else { response.getWriter().print("<script>alert('修改失败');</script>"); } response.getWriter().print("<script>location.href='/zcg246/Note'</script>"); } }