jsp学生教师信息管理系统

package com.hp.servlet; import java.io.IOException; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.hp.bean.Student; import com.hp.bean.Teacher; import com.hp.db.DB; public class studentInfo extends HttpServlet { public void init() throws ServletException { } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String servletPath = request.getServletPath(); if (servletPath.equals("/Login")) { DB findDb = new DB(); String user = request.getParameter("user"); String pw = request.getParameter("pw"); if (user == null || user == "" || pw == null || pw == "") { request.setAttribute("Att_login_message", "请补全登陆信息"); RequestDispatcher dispatcher_login = request.getRequestDispatcher("/Login.jsp"); if(dispatcher_login!=null){ dispatcher_login.forward(request, response); return; } } else { String Name = new String(user.getBytes("ISO-8859-1"), "utf-8"); String Pass = new String(pw.getBytes("ISO-8859-1"), "utf-8"); boolean findYesOrFalse = findDb.find(Name, Pass); if (findYesOrFalse) { String stuOrTea = new String(request.getParameter("login_type").getBytes("ISO-8859-1"), "utf-8"); if (stuOrTea.equals("学生")) { servletPath = "/StudentInfo.jsp"; } else if (stuOrTea.equals("教师")) { servletPath = "/TeacherInfo.jsp"; } request.setAttribute("Att_login_pass",Pass); request.setAttribute("Att_login_user",Name); }else{ request.setAttribute("Att_login_message", "用戶名或密码错误"); RequestDispatcher dispatcher_login_error = request.getRequestDispatcher("/Login.jsp"); if(dispatcher_login_error!=null){ dispatcher_login_error.forward(request, response); return; } } } }else if(servletPath.equals("/Register")){ String register_user_no = request.getParameter("register_user"); String register_pass_no = request.getParameter("register_pass1"); if(register_user_no==null||register_user_no==""||register_pass_no==null||register_pass_no==""){ request.setAttribute("Att_register_error","请补全注册信息"); servletPath = "/Register.jsp"; }else{ String register_user = new String(request.getParameter("register_user").getBytes("ISO-8859-1"),"utf-8"); String register_pass1 = request.getParameter("register_pass1"); String register_pass2 = request.getParameter("register_pass2"); if(!register_pass1.equals(register_pass2)){ request.setAttribute("Att_register_error","两次密码不一致"); RequestDispatcher dispatcher_pass = request.getRequestDispatcher("/Register.jsp"); if(dispatcher_pass!=null){ dispatcher_pass.forward(request, response); return; } }else{ DB registerDb = new DB(); boolean RegTrueOrFalse = registerDb.register(register_user, register_pass1); if(RegTrueOrFalse){ servletPath = "/Login.jsp"; request.setAttribute("Att_register_message","用户:"+register_user+" 注册成功"); }else{ servletPath = "/Register.jsp"; request.setAttribute("Att_register_error","该用户已被注册"); } } } }else if(servletPath.equals("/addInfo")){ String addId = request.getParameter("addId"); String add_login_pass = request.getParameter("add_login_pass"); String add_login_user =new String(request.getParameter("add_login_user").getBytes("iso-8859-1"),"utf-8"); if(addId==null){ request.setAttribute("Att_add_login_pass",add_login_pass); request.setAttribute("Att_add_login_user",add_login_user); String login_stu_tea = new String(request.getParameter("login_stu_tea").getBytes("iso-8859-1"),"utf-8"); if(login_stu_tea.equals("学生")){ servletPath = "/addStuInfo.jsp"; }else{ servletPath = "/addTeaInfo.jsp"; } }else{ request.setAttribute("Att_login_pass",add_login_pass); request.setAttribute("Att_login_user",add_login_user); String login_stu_tea_add = new String(request.getParameter("login_stu_tea_add").getBytes("ISO-8859-1"),"utf-8"); if(login_stu_tea_add.equals("学生")){ String addStuName = new String(request.getParameter("addStuName").getBytes("iso-8859-1"),"utf-8"); String addStuClass = new String(request.getParameter("addStuClass").getBytes("iso-8859-1"),"utf-8"); DB addStuDb = new DB(); addStuDb.addStuInfo(addId, addStuName, addStuClass); servletPath = "/StudentInfo.jsp"; }else{ String addTeaName = new String(request.getParameter("addTeaName").getBytes("iso-8859-1"),"utf-8"); String addTeaPhone = request.getParameter("addTeaPhone"); DB addTeaDb = new DB(); addTeaDb.addTeaInfo(addId, addTeaName, addTeaPhone); servletPath = "/TeacherInfo.jsp"; } } }else if(servletPath.equals("/deleteInfo")){ String delete_login_user = new String(request.getParameter("delete_login_user").getBytes("ISO-8859-1"),"utf-8"); String delete_login_pass = request.getParameter("delete_login_pass"); int deleteId =Integer.parseInt(request.getParameter("deleteId")); String delete_stu_tea = new String(request.getParameter("delete_stu_tea").getBytes("iso-8859-1"),"utf-8"); DB delete_info_db = new DB(); delete_info_db.deleteInfo(deleteId, delete_stu_tea); if(delete_stu_tea.equals("学生")){ servletPath = "/StudentInfo.jsp"; }else{ servletPath = "/TeacherInfo.jsp"; } request.setAttribute("Att_login_pass",delete_login_pass); request.setAttribute("Att_login_user",delete_login_user); }else if(servletPath.equals("/updateInfo")){ int update_Id = Integer.parseInt(request.getParameter("update_Id")); String update_login_user = new String(request.getParameter("update_login_user").getBytes("iso-8859-1"),"utf-8"); String update_login_pass = request.getParameter("update_login_pass"); String update_stu_tea = new String(request.getParameter("update_stu_tea").getBytes("iso-8859-1"),"utf-8"); if(request.getParameter("update_biaoji")==null){ if(update_stu_tea.equals("学生")){ String update_StuId_first = request.getParameter("update_StuId"); String update_StuName_first = new String(request.getParameter("update_StuName").getBytes("iso-8859-1"),"utf-8"); String update_StuClass_first = new String(request.getParameter("update_StuClass").getBytes("iso-8859-1"),"utf-8"); request.setAttribute("Att_update_StuId",update_StuId_first); request.setAttribute("Att_update_StuName",update_StuName_first); request.setAttribute("Att_update_StuClass",update_StuClass_first); servletPath = "/updateStu.jsp"; }else{ String update_TeaId_first = request.getParameter("update_TeaId"); String update_TeaName_first = new String(request.getParameter("update_TeaName").getBytes("iso-8859-1"),"utf-8"); String update_TeaPhone_first = new String(request.getParameter("update_TeaPhone").getBytes("iso-8859-1"),"utf-8"); request.setAttribute("Att_update_TeaId",update_TeaId_first); request.setAttribute("Att_update_TeaName",update_TeaName_first); request.setAttribute("Att_update_TeaPhone",update_TeaPhone_first); servletPath = "/updateTea.jsp"; } request.setAttribute("Att_update_Id",update_Id); request.setAttribute("Att_update_login_pass",update_login_pass); request.setAttribute("Att_update_login_user",update_login_user); }else{ if(update_stu_tea.equals("学生")){ String update_StuId = request.getParameter("update_StuId"); String update_StuName = new String(request.getParameter("update_StuName").getBytes("iso-8859-1"),"utf-8"); String update_StuClass = new String(request.getParameter("update_StuClass").getBytes("iso-8859-1"),"utf-8"); DB update_stu_db