Spring Form, DAO with Spring

Required tag lib for spring form to be used
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

This is how form is used for spring

<form:form action="displayUserInfo" modelAttribute="user">
    Name:<form:input path="name" required="true" placeholder="Enter your name"/><p/>
    <form:errors path="name" cssStyle="color: red"/>
    Gender Male: <form:radiobutton path="gender" value="male"/><p/>
    female: <form:radiobutton path="gender" value="female"/><p/>

    Country: <form:select path="country">
        <form:option value="India"/>
    <form:option value="China"/>
    <form:option value="Usa"/>
    <form:option value="Nepal"/>
    </form:select>
    <p/>
    Introduction:<form:textarea path="introduction"/><p/>
    Visited Countries:
    Nawal: <form:checkbox path="visitedDistrict" value="Nawalparasi"/>
    Chitwan: <form:checkbox path="visitedDistrict" value="Chitwan"/>
    Dharan: <form:checkbox path="visitedDistrict" value="Dharan"/>
    Pokhara: <form:checkbox path="visitedDistrict" value="Pokhara"/>

    <input type="submit" value="Submit">
</form:form>

DAO With Spring

AppConfig.java

package com.mountech.spring.config;

import com.mountech.spring.DAO.AppDAOImpl;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;

@Configuration
public class AppConfig {

    @Bean
    public DataSource getDataSource(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/project?serverTimezone=UTC");
        dataSource.setUsername("root");
        dataSource.setPassword("Mountech@123.com");
        return dataSource;
    }

    @Bean(name="DAOBean")
    public AppDAOImpl AppDAO(){
        return new AppDAOImpl(getDataSource());
    }
}
AppDaoImpl.java
package com.mountech.spring.DAO;

import com.mountech.spring.model.User;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class AppDAOImpl implements AppDAO{
    private DataSource dataSource = null;
    public AppDAOImpl(DataSource dataSource) {
        this.dataSource = dataSource;
    }


    public List<User> getUserList() {
       String SQL = "select * from users";
       List<User> userList = new ArrayList<User>();
        Connection con = null;
        try{
            con = dataSource.getConnection();
            PreparedStatement stmt = con.prepareStatement(SQL);
            ResultSet rs = stmt.executeQuery();
           while(rs.next()){
               User temp = new User(rs.getInt("user_id"),
                       rs.getString("name"),
                       rs.getString("email")
                       );
               userList.add(temp);
           }
        } catch (SQLException throwable) {
            throwable.printStackTrace();
        }
        return userList;
    }

    public void addUser(User user)  {
        String SQL = "INSERT INTO users (name, email) VALUES(?, ?)";
        try {
            Connection con = dataSource.getConnection();
            PreparedStatement stmt = con.prepareStatement(SQL);
            stmt.setString(1, user.getName());
            stmt.setString(2, user.getEmail());
            stmt.execute();
            stmt.close();
        } catch (SQLException throwable) {
            throwable.printStackTrace();
        }
    }

}
HomaController.java
package com.mountech.spring;

import com.mountech.spring.DAO.AppDAOImpl;
import com.mountech.spring.config.AppConfig;
import com.mountech.spring.model.User;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.validation.Valid;
import java.util.ArrayList;
import java.util.List;


@Controller
public class HomeController {
    @RequestMapping("/")
    public ModelAndView home() {
        ModelAndView modelAndView = new ModelAndView("index");
        List<User> userList = new ArrayList<User>();
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(AppConfig.class);
        AppDAOImpl DAO = context.getBean("DAOBean", AppDAOImpl.class);
        userList = DAO.getUserList();
        modelAndView.addObject("userList", userList);
        return modelAndView;
    }

    @RequestMapping("/addUser")
    public String adduser(Model model, @Valid User user, BindingResult result){
        if(result.hasErrors()){
            model.addAttribute("user", user);
        }else{
            if(user.getEmail() != null || user.getName() != null){
                AnnotationConfigApplicationContext context =
                        new AnnotationConfigApplicationContext(AppConfig.class);
                AppDAOImpl DAO = context.getBean("DAOBean", AppDAOImpl.class);
                DAO.addUser(user);
                context.close();
                return "forward:/";
            }
        }
        return "addUser";
    }
}
Redirection of adduser to adduser page
<a href="${pageContext.request.contextPath}/addUser">Add User</a>