package bdqn.newsManageServlet.Servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import bdqn.newsManageServlet.Dao.categoryTBDao; import bdqn.newsManageServlet.Dao.Impl.categoryTBDaoImpl; import bdqn.newsManageServlet.entity.categoryTB; public class doCategoryModifyServlet extends HttpServlet { /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); PrintWriter out = response.getWriter(); //获取id request.setCharacterEncoding("utf-8"); String name=request.getParameter("categoryName"); int id=0; if(request.getParameter("cgid")!=null){ id=Integer.parseInt(request.getParameter("cgid")); } //int id=Integer.parseInt(request.getParameter("cgid")); //调用访问数据称 categoryTBDao cdao=new categoryTBDaoImpl(); //1.判断类别是否重复(在数据库中查询) //2.如果有重复,提示错误信息,转发到添加 if(cdao.getCateByName(name)!=null){ request.setAttribute("ermsg", "类别名已存在!"); request.getRequestDispatcher("adminManage/modifyCategory.jsp").forward(request, response); return; } //在数据库中修改 categoryTB cate=new categoryTB(); cate.setCategoryName(name); cate.setCategoryID(id); int rel=cdao.updateCategory(cate); if(rel>0){ //修改成功 out.print("<script>alert('修改成功');location.href='adminManage/manageTopic.jsp';</script>"); }else{ request.setAttribute("ermsg", "修改失败"); request.getRequestDispatcher("adminManage/modifyCategory.jsp").forward(request, response); return; } } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }