package controller;

import dao.UserDao;
import model.*;

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 javax.servlet.http.HttpSession;
import java.io.IOException;
import java.sql.SQLException;

@WebServlet("/changepwd")
public class ChangePasswordController extends HttpServlet {

private static final String student = "学生";
    private static final String teacher = "导师";
    private static final String academicAdmin = "学院管理呿";
    private static final String schoolAdmin = "研究生院管理呿";

@Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=utf-8;");
        String former = req.getParameter("former");
        String newpwd = req.getParameter("new");
        String confirm = req.getParameter("confirm");
        String userType = req.getParameter("userType");
        System.out.println("userType line 31: " + userType);
        HttpSession session = req.getSession();
        if(newpwd.equals(confirm)) {
            if (student.equals(userType)) {
                Student stu = (Student)session.getAttribute("currentStudent");
                System.out.println("stu.getStudent_number(): " + stu.getStudent_number());
                boolean exists = UserDao.userExists(stu.getStudent_number(), former, stu.getIdentity());
                if(!exists){
                    resp.getWriter().println("

错误,原密码输入错诿

错误,原密码输入错诿

错误,原密码输入错诿

错误,原密码输入错诿

错误,修改失败

密码修改成功

错误,两次密码不一臿

@Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

导师双选系统

原文：https://www.cnblogs.com/daizuo/p/13974655.html