src/sanrenxing/teacher/servlet/TeacherServlet.java

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package sanrenxing.teacher.servlet;

import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;
import sanrenxing.Class.domain.ClassName;
import sanrenxing.teacher.dao.TeacherDao;
import sanrenxing.teacher.dao.impl.TeacherDaoImpl;
import sanrenxing.teacher.domain.RoleName;
import sanrenxing.teacher.domain.Teacher;
import sanrenxing.teacher.domain.TeacherTo;

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 java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @description：对Emp表操作的控制器类
 * @auth：胡标
 * @date:2020/8/26 0026 - 9:58
 * @version:1.0
 */
@WebServlet("/TeacherServlet")
public class TeacherServlet extends HttpServlet {
    //定义数据层对象
    private TeacherDao teacherDao =new TeacherDaoImpl();

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html");
        resp.setCharacterEncoding("utf-8");

        //获得请求路径中的操作方式参数
        String method=req.getParameter("method");
        //判断操作方式，执行方法代码
        if("findAll".equals(method)){
            //调用查询所有数据的方法
            findAll(req,resp);
        }else if("add".equals(method)){
            //调用增加员工的方法
            add(req,resp);
        }else if("update".equals(method)){
            //调用修改方法
            update(req,resp);
        }else if("batchDel".equals(method)){
            //调用删除方法
            batchDel(req,resp);
        }else if("delete".equals(method)){
            //删除单行
            delete(req,resp);
        }else if ("findRoleName".equals(method)){
            findRoleName(req,resp);