간단하게 index.jsp 파일에 MRS 데이터베이스의 Employee 테이블의 정보를 출력하는 과정을 통해 DB 연동 방법을 살펴보자.

DTO

package dto;

import java.sql.Date;

public class EmployeeVO {
	
	private String employee_id;
	private String employee_password;
	private String employee_department;
	private String employee_manager;
	private String employee_email;
	private String employee_contact;
	private Date employee_last_access_date;	
	
	public String getEmployee_id() {
		return employee_id;
	}
	public void setEmployee_id(String employee_id) {
		this.employee_id = employee_id;
	}
	public String getEmployee_password() {
		return employee_password;
	}
	public void setEmployee_password(String employee_password) {
		this.employee_password = employee_password;
	}
	public String getEmployee_department() {
		return employee_department;
	}
	public void setEmployee_department(String employee_department) {
		this.employee_department = employee_department;
	}
	public String getEmployee_manager() {
		return employee_manager;
	}
	public void setEmployee_manager(String employee_manager) {
		this.employee_manager = employee_manager;
	}
	public String getEmployee_email() {
		return employee_email;
	}
	public void setEmployee_email(String employee_email) {
		this.employee_email = employee_email;
	}
	public String getEmployee_contact() {
		return employee_contact;
	}
	public void setEmployee_contact(String employee_contact) {
		this.employee_contact = employee_contact;
	}
	public Date getEmployee_last_access_date() {
		return employee_last_access_date;
	}
	public void setEmployee_last_access_date(Date employee_last_access_date) {
		this.employee_last_access_date = employee_last_access_date;
	}
	
}

DAO

package dao;

import java.util.List;

import dto.EmployeeVO;

public interface EmployeeDAO {

	public List<EmployeeVO> selectEmployee() throws Exception;

}

DAOImpl

package dao.impl;

import java.util.List;

import javax.annotation.Resource;

import org.apache.ibatis.session.SqlSession;
import org.springframework.stereotype.Repository;

import dao.EmployeeDAO;
import dto.EmployeeVO;

@Repository("EmployeeDAO")
public class EmployeeDAOImpl implements EmployeeDAO{

	@Resource(name = "sqlSession")
	private SqlSession sqlSession;

	@Override
	public List<EmployeeVO> selectEmployee() throws Exception {
		return sqlSession.selectList("mapper.employeeMapper.selectEmployee");
	}
}

Service

package service;

import java.util.List;

import dto.EmployeeVO;

public interface EmployeeService {

	public List<EmployeeVO> selectEmployee() throws Exception;

}

ServiceImpl

package service.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import dao.EmployeeDAO;
import dto.EmployeeVO;
import service.EmployeeService;

@Service("EmployeeService")
public class EmployeeServiceImpl implements EmployeeService {
	
	@Resource(name = "EmployeeDAO")
	private EmployeeDAO employeeDao;

	@Override
	public List<EmployeeVO> selectEmployee() throws Exception {
		return employeeDao.selectEmployee();
	}

}

Mapper

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 
<mapper namespace="mapper.employeeMapper">

    <select id="selectEmployee" resultType="EmployeeVO">
        SELECT *
       	  FROM employee
    </select>
  
</mapper>

Controller

package controller;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import dto.EmployeeVO;
import service.impl.EmployeeServiceImpl;

@Controller
public class EmployeeController {
	
	@Resource(name = "EmployeeService")
	private EmployeeServiceImpl employeeService;
	
	// 직원 데이터
	@RequestMapping(value = "emp")
	public String employee(Model model) throws Exception {
		List<EmployeeVO> employeeList = employeeService.selectEmployee();
		model.addAttribute("employeeList", employeeList);
		return "/index.jsp";
	}

}

View

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<html>
<head>
	<title>Employee Info</title>
</head>
<body>
    <h1>Employee Information</h1>
 
    <table>
        <thead>
            <tr>
                <th>ID</th>
                <th>Password</th>
                <th>Department</th>
                <th>Manager</th>
                <th>Email</th>
                <th>Contact</th>
                <th>Last Access Date</th>
            </tr>
        </thead>
        <tbody>
            <c:forEach items="${employeeList}" var="employee">
                <tr>
                    <td>${employee.employee_id}</td>
                    <td>${employee.employee_password}</td>
                    <td>${employee.employee_department}</td>
                    <td>${employee.employee_manager}</td>
                    <td>${employee.employee_email}</td>
                    <td>${employee.employee_contact}</td>
                    <td>${employee.employee_last_access_date}</td>
                </tr>
            </c:forEach>
        </tbody>
    </table>
 
</body>
</html>