2020 12 15

员工培训系统，

servlet层：

package sevelet;

import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

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 dao.dao;
import bean.section;
import bean.student;
import bean.teacher;
import bean.job;

/**
 * Servlet implementation class sevelet
 */
@WebServlet("/sevelet")
public class sevelet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public sevelet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doPost(request,response);
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
        String method=request.getParameter("method");
        dao p=new dao();
        if(method.equals("login"))
        {
            String user=request.getParameter("user");
            String num=request.getParameter("num");
            String password=request.getParameter("password");
            if(user.equals("管理员"))
            {
                try {
                    if(p.checkM(num, password))
                    {
                        request.getRequestDispatcher("loginM.jsp").forward(request, response);
                    }
                    else
                    {
                        System.out.println("用户名或密码错误！请重新登录！"+num+password);
                        request.getRequestDispatcher("user.jsp").forward(request, response);
                    }
                } catch (SQLException e) {
                    // TODO 自动生成的 catch 块
                    e.printStackTrace();
                }
            }
            else if(user.equals("员工"))
            {
                try {
                    if(p.checkS(num, password))
                    {
                        student a=p.Mgetstudent(num);
                        request.setAttribute("Astudent",a);
                        request.getRequestDispatcher("loginS.jsp").forward(request, response);
                    }
                    else
                    {
                        System.out.println("用户名或密码错误！请重新登录！"+num+password);
                        request.getRequestDispatcher("user.jsp").forward(request, response);
                    }
                } catch (SQLException e) {
                    // TODO 自动生成的 catch 块
                    e.printStackTrace();
                }
            }
            else if(user.equals("教师"))
            {
                try {
                    if(p.checkT(num, password))
                    {
                        teacher a=p.Mgetteacher(num);
                        request.setAttribute("Ateacher",a);
                        request.getRequestDispatcher("loginT.jsp").forward(request, response);
                    }
                    else
                    {
                        System.out.println("3");
                        System.out.println("用户名或密码错误！请重新登录！"+num+password);
                        request.getRequestDispatcher("user.jsp").forward(request, response);
                    }
                } catch (SQLException e) {
                    // TODO 自动生成的 catch 块
                    e.printStackTrace();
                }
            }
        }
        else if(method.equals("setp"))
        {
            try {
                List<section> list1=p.Mfindsection();
                List<job> list2=p.Mfindjob();
                request.setAttribute("Asection",list1);
                request.setAttribute("Ajob",list2);
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            request.getRequestDispatcher("setP.jsp").forward(request, response);        
        }
        else if(method.equals("add"))
        {
            String user=request.getParameter("user");
            String ID=request.getParameter("ID");
            String password=request.getParameter("password");
            String name=request.getParameter("name");
            String sex=request.getParameter("sex");
            String section=request.getParameter("section");
            String job=request.getParameter("job");
            try {
                if(p.add(user,name,ID,sex,job,section,password))
                {
                    request.getRequestDispatcher("manager1.jsp").forward(request, response);
                }
                else
                {
                    System.out.println("添加失败！");
                    request.getRequestDispatcher("loginM.jsp").forward(request, response);
                }
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
        }
        else if(method.equals("find"))
        {
    
            String user=request.getParameter("user");
            String string1=request.getParameter("string1");
            String string2=request.getParameter("string2");
                    if(user.equals("员工"))
                    {
                        List<student> list=new ArrayList<student>();
                        try {
                            list=p.Mfindstudent(string1, string2);
                        } catch (SQLException e) {
                            // TODO 自动生成的 catch 块
                            e.printStackTrace();
                        }
                        request.setAttribute("user",user);
                        request.setAttribute("Astudent",list);
                        request.getRequestDispatcher("findP2.jsp").forward(request, response);
                    }
                    else
                    {
                        List<teacher> list=new ArrayList<teacher>();
                        try {
                            list=p.Mfindteacher(string1, string2);
                        } catch (SQLException e) {
                            // TODO 自动生成的 catch 块
                            e.printStackTrace();
                        }
                        request.setAttribute("user",user);
                        request.setAttribute("Ateacher",list);
                        request.getRequestDispatcher("findP2.jsp").forward(request, response);
                    }
        }
        else if(method.equals("set"))
        {
            String user=request.getParameter("user");
            String ID=request.getParameter("ID");
            String name=request.getParameter("name");
            try {
                if(p.set(user,ID, name)) System.out.println("设置成功");
                else System.out.println("设置失败");
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            if(user.equals("section")) request.getRequestDispatcher("setsection1.jsp").forward(request, response);
            else if(user.equals("job"))    request.getRequestDispatcher("setjob1.jsp").forward(request, response);
        }
        else if(method.equals("sectionset"))
        {
            try {
                List<section> list=p.Msection();
                request.setAttribute("Asection",list);
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            request.getRequestDispatcher("sectionset.jsp").forward(request, response);
                    
        }
        else if(method.equals("jobset"))
        {
            try {
                List<job> list=p.Mjob();
                request.setAttribute("Ajob",list);
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            request.getRequestDispatcher("jobset.jsp").forward(request, response);
                    
        }
        else if(method.equals("delete"))
        {
            String user=request.getParameter("user");
                String ID=request.getParameter("ID");
            try {
                p.delete(ID,user);
                
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            if(user.equals("section"))
            {
            List<section> list;
            try {
                list = p.Msection();
                request.setAttribute("Asection",list);
                request.getRequestDispatcher("sectionset.jsp").forward(request, response);
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            }
            else if(user.equals("job"))
            {
                try {
                    List<job> list=p.Mjob();
                    request.setAttribute("Ajob",list);
                } catch (SQLException e) {
                    // TODO 自动生成的 catch 块
                    e.printStackTrace();
                }
                request.getRequestDispatcher("jobset.jsp").forward(request, response);
            }
                    
        }
        else if(method.equals("update"))
        {
            try {
                String user=request.getParameter("user");
                String ID=(String) request.getSession().getAttribute("ID");
                String name=request.getParameter("name");
                p.update(user,name,ID);
                List<section> list=p.Msection();
                request.setAttribute("Asection",list);
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            request.getRequestDispatcher("sectionset.jsp").forward(request, response);
                    
        }
        else if(method.equals("beforeupdate"))
        {
            String user=request.getParameter("user");
            String ID=request.getParameter("ID");
                try {
                    List<section> list1 = p.Mfindsection();
                    List<job> list2=p.Mfindjob();
                    request.setAttribute("Asection",list1);
                    request.setAttribute("Ajob",list2);
                } catch (SQLException e) {
                    // TODO 自动生成的 catch 块
                    e.printStackTrace();
                }
                if(user.equals("student"))
                {
                    try {
                        student a = p.Mgetstudent(ID);
                        request.setAttribute("Astudent",a);
                    } catch (SQLException e) {
                        // TODO 自动生成的 catch 块
                        e.printStackTrace();
                    }
                    request.getRequestDispatcher("updatestudent.jsp").forward(request, response);
                }
                else
                {
                    try {
                        teacher a = p.Mgetteacher(ID);
                        request.setAttribute("Ateacher",a);
                    } catch (SQLException e) {
                        // TODO 自动生成的 catch 块
                        e.printStackTrace();
                    }
                    request.getRequestDispatcher("updateteacher.jsp").forward(request, response);
                }
                    
        }
        else if(method.equals("update2"))
        {
                String user=request.getParameter("user");
                String ID=(String) request.getSession().getAttribute("ID");
                String name=request.getParameter("name");
                String sex=request.getParameter("sex");
                String job=request.getParameter("job");
                String section=request.getParameter("section");
                try {
                    List<section> list1 = p.Mfindsection();
                    List<job> list2=p.Mfindjob();
                    request.setAttribute("Asection",list1);
                    request.setAttribute("Ajob",list2);
                } catch (SQLException e) {
                    // TODO 自动生成的 catch 块
                    e.printStackTrace();
                }
                if(user.equals("student"))
                {
                    try {
                        p.update2(user,ID,name,sex,job,section);
                        student a = p.Mgetstudent(ID);
                        request.setAttribute("Astudent",a);
                    } catch (SQLException e) {
                        // TODO 自动生成的 catch 块
                        e.printStackTrace();
                    }
                    request.getRequestDispatcher("updatestudent.jsp").forward(request, response);
                }
                else
                {
                    try {
                        p.update2(user,ID,name,sex,job,section);
                        teacher a = p.Mgetteacher(ID);
                        request.setAttribute("Ateacher",a);
                    } catch (SQLException e) {
                        // TODO 自动生成的 catch 块
                        e.printStackTrace();
                    }
                    request.getRequestDispatcher("updateteacher.jsp").forward(request, response);
                }
        }
        else if(method.equals("setclass"))
        {
            try {
                List<teacher> list=p.Mfindteacher1();
                request.setAttribute("Ateacher",list);
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            
            request.getRequestDispatcher("setclass.jsp").forward(request, response);        
        }
        else if(method.equals("setclass1"))
        {
            String ID=request.getParameter("ID");
            String name=request.getParameter("name");
            String teacher=request.getParameter("teacher");
            try {
                if(p.addclass(ID, name, teacher))
                {
                    List<teacher> list=p.Mfindteacher1();
                    request.setAttribute("Ateacher",list);
                }
            } catch (SQLException e) {
                // TODO 自动生成的 catch 块
                e.printStackTrace();
            }
            request.getRequestDispatcher("setclass.jsp").forward(request, response);        
        }
    }

}