이제 마이바티스까지 연결을 했으니 사용을 해야 하지 않나? 이제는 데이터를 가지고 가져와서 뿌려줘 보겠다. 다시 한 번말씀드리지만 저는 MySQL사용했습니다.

저는 좀 빠르게 많은 데이터를 가지고 진행해 보기 위해 데이터를 랜덤 값으로 만들어주는 사이트를 이용했습니다. 랜덤 데이터 생성

테이블 생성

위에서 말한 사이트에서 입력만 잘해주면 테이블도 만들어주는 쿼리를 만듭니다. 대신 난장판이라 수정은 해주셔야합니다.

CREATE TABLE `tb_board` (
`IDX` mediumint unsigned NOT NULL auto_increment,
`PARENT_IDX` mediumint default NULL,
`TITLE` varchar(100) default NULL,
`CONTENTS` varchar(4000) default NULL,
`HIT_CNT` mediumint default NULL,
`DEL_GB` varchar(1) default NULL,
`CREA_DTM` date,
PRIMARY KEY (`IDX`)
) AUTO_INCREMENT=1;

랜덤 데이터 생성

저는 간단하게 100개만 생성했습니다.

INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (1,7,"Tanek","Marcia",8,"N","12/11/2018"),(2,7,"Preston","Whilemina",1,"N","01/31/2018"),(3,2,"Fitzgerald","Imani",7,"N","05/28/2018"),(4,9,"Abel","Ocean",7,"N","03/27/2017"),(5,8,"Ryder","Evangeline",2,"N","03/22/2018"),(6,7,"Solomon","Lani",9,"N","01/08/2019"),(7,1,"Oscar","Tanisha",2,"N","02/07/2017"),(8,1,"Quamar","Xantha",7,"N","12/12/2018"),(9,2,"Kane","Janna",8,"N","03/29/2017"),(10,7,"Mannix","Melodie",1,"N","07/30/2017");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (11,9,"Uriel","Hannah",9,"N","02/17/2017"),(12,8,"Dorian","Kiayada",7,"N","12/03/2018"),(13,9,"Abdul","Karyn",5,"N","08/26/2018"),(14,1,"Rafael","Rhoda",3,"N","04/30/2017"),(15,5,"Vance","Angelica",2,"N","07/21/2017"),(16,9,"Lucian","Tallulah",5,"N","05/18/2017"),(17,4,"Armando","Chiquita",3,"N","11/05/2017"),(18,8,"Cyrus","Brynne",8,"N","06/23/2018"),(19,4,"Colt","Chiquita",4,"N","01/08/2018"),(20,9,"Melvin","Leslie",4,"N","02/01/2018");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (21,8,"Lyle","Gay",3,"N","05/29/2017"),(22,3,"Zane","Gemma",3,"N","02/09/2017"),(23,8,"Griffin","Hadley",1,"N","01/27/2018"),(24,3,"Ulysses","Medge",9,"N","02/06/2017"),(25,4,"Fulton","Guinevere",3,"N","07/26/2017"),(26,4,"Edward","Pandora",5,"N","08/18/2018"),(27,8,"Phillip","Jessamine",7,"N","09/24/2017"),(28,3,"Benedict","Doris",10,"N","09/24/2018"),(29,3,"Steven","Aileen",7,"N","08/22/2018"),(30,5,"Carter","Tana",7,"N","08/31/2018");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (31,2,"Nero","Bertha",1,"N","06/27/2017"),(32,6,"Magee","Kristen",6,"N","09/06/2018"),(33,5,"Xanthus","Maya",10,"N","09/09/2017"),(34,4,"Dalton","Kiona",3,"N","06/11/2018"),(35,4,"Dorian","Maya",2,"N","04/05/2017"),(36,9,"Hilel","Selma",1,"N","03/28/2017"),(37,3,"Wallace","Remedios",3,"N","09/26/2018"),(38,9,"Marshall","Savannah",6,"N","08/28/2017"),(39,6,"Deacon","Tatum",7,"N","08/11/2017"),(40,9,"Kelly","Yael",2,"N","09/17/2017");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (41,8,"Gannon","Daphne",3,"N","03/10/2017"),(42,2,"Lucian","Liberty",1,"N","01/10/2019"),(43,5,"Davis","Aline",4,"N","09/17/2017"),(44,4,"Andrew","Kitra",1,"N","11/07/2017"),(45,4,"Stone","Jade",9,"N","01/09/2018"),(46,10,"Lev","Brenna",2,"N","03/28/2017"),(47,3,"Mason","Hermione",1,"N","04/23/2018"),(48,7,"Hasad","Miranda",2,"N","06/20/2018"),(49,5,"Lionel","Hollee",3,"N","09/26/2017"),(50,9,"Zachary","Irene",10,"N","07/16/2017");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (51,5,"Dennis","Alexandra",7,"N","07/07/2018"),(52,5,"Owen","Kyra",8,"N","08/12/2017"),(53,9,"Ashton","Alexa",3,"N","10/21/2017"),(54,8,"Judah","Miranda",1,"N","02/04/2018"),(55,8,"Deacon","Xerxes",9,"N","11/26/2018"),(56,5,"Sylvester","Hedy",3,"N","07/05/2017"),(57,2,"Jordan","Naomi",5,"N","11/03/2018"),(58,7,"Merrill","Selma",4,"N","04/14/2017"),(59,7,"Galvin","Tanya",10,"N","06/12/2018"),(60,2,"Aladdin","Karleigh",9,"N","01/17/2019");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (61,7,"Clayton","Ignacia",6,"N","11/23/2018"),(62,1,"Logan","Ifeoma",1,"N","06/18/2017"),(63,7,"Prescott","Kyra",10,"N","03/23/2017"),(64,5,"Abel","Hollee",6,"N","11/25/2018"),(65,8,"Caldwell","Eden",2,"N","07/26/2018"),(66,1,"Joshua","Marah",6,"N","03/04/2017"),(67,9,"Herrod","Ainsley",7,"N","04/02/2017"),(68,10,"Cameron","Petra",6,"N","04/18/2017"),(69,3,"Kenyon","Veda",9,"N","04/03/2017"),(70,3,"Graiden","Katelyn",5,"N","01/12/2018");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (71,1,"Grady","Zelenia",10,"N","08/06/2018"),(72,1,"Finn","Madeson",2,"N","03/24/2017"),(73,10,"Paul","Debra",2,"N","10/01/2017"),(74,4,"Galvin","Laurel",9,"N","06/20/2017"),(75,3,"Merrill","Tatiana",8,"N","12/31/2017"),(76,3,"Felix","Illana",4,"N","03/19/2017"),(77,5,"Emery","Eliana",3,"N","07/28/2018"),(78,7,"Hedley","Carissa",7,"N","03/08/2017"),(79,7,"Herman","Tasha",5,"N","07/23/2017"),(80,5,"Francis","Kirestin",2,"N","07/25/2018");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (81,10,"Kennedy","Naida",6,"N","06/07/2018"),(82,7,"Jelani","Heidi",6,"N","08/31/2017"),(83,10,"Coby","Hilary",8,"N","10/30/2017"),(84,10,"Leo","Alika",4,"N","07/31/2018"),(85,8,"Jason","Irene",6,"N","03/26/2018"),(86,6,"Emerson","Natalie",5,"N","10/29/2018"),(87,4,"Cameron","Cynthia",6,"N","01/17/2019"),(88,6,"Nehru","Nola",3,"N","02/20/2018"),(89,9,"Keith","Kelsie",8,"N","06/07/2017"),(90,9,"Fulton","Zorita",7,"N","04/15/2017");
INSERT INTO `tb_board` (`IDX`,`PARENT_IDX`,`TITLE`,`CONTENTS`,`HIT_CNT`,`DEL_GB`,`CREA_DTM`) VALUES (91,2,"Avram","Bryar",4,"N","05/13/2017"),(92,7,"Graham","Bertha",5,"N","07/20/2018"),(93,3,"Ralph","Melyssa",8,"N","06/03/2017"),(94,3,"Aladdin","Ainsley",2,"N","12/09/2017"),(95,5,"Stewart","Camilla",6,"N","04/03/2018"),(96,2,"Yasir","Freya",4,"N","03/26/2017"),(97,4,"Justin","Fallon",5,"N","02/10/2018"),(98,6,"Allistair","Lisandra",4,"N","11/03/2018"),(99,7,"Merritt","Vielka",9,"N","02/07/2017"),(100,2,"Tyler","Wynne",9,"N","08/15/2017");

MVC패턴을 위한 파일들 생성

  • mvc을 진행하기 위해 controller, service, serviceImpl, DAO파일을 생성합니다.
  • 저는 컨트롤러에서 메인으로 연결해서 사용했습니다.
@Controller
public class MainController {

@Resource(name="mainService")
  private MainService mainService;

Logger log = Logger.getLogger(this.getClass());

  @RequestMapping(value="/main.do")
  public ModelAndView mainController(Map<String,Object> commandMap) throws Exception{

    ModelAndView mv = new ModelAndView("main");
      log.debug("인터셉터 테스트");

      List<Map<String,Object>> list = mainService.selectBoardList(commandMap);
      mv.addObject("list", list);

      return mv;
  }
}
  • 서비스는 인터페이스입니다.
public interface MainService {

  List<Map<String, Object>> selectBoardList(Map<String, Object> commandMap) throws Exception;

}
  • 서비스임플은 말그래도 서비스를 임플해서 사용합니다.
@Service("mainService")
public class MainServiceImpl implements MainService{

  Logger log = Logger.getLogger(this.getClass());

    @Resource(name="mainDAO")
    private MainDAO mainDAO;

  @Override
  public List<Map<String, Object>> selectBoardList(
      Map<String, Object> commandMap) throws Exception {

    return mainDAO.selectBoardList(commandMap);
  }
}
  • _SQL.xml과 연결할 mapper입니다.
@Repository("mainDAO")
public class MainDAO extends AbstractDAO{

  //DAO는 데이터베이스에 접근하여 데이터를 조작하는 (가져오거나 입력하는 등) 역할만 수행한다.
  //selectList 메서드의 인자는 두가지이다. 첫번째는 쿼리 이름, 두번째는 쿼리가 실행되는데 필요한 변수들이다.
  @SuppressWarnings("unchecked")
    public List<Map<String, Object>> selectBoardList(Map<String, Object> map) throws Exception{

        return (List<Map<String, Object>>)selectList("mainList.selectBoardList", map);
    }
}

SQL문 작성

  • 이제 sql.xml까지 연결을 했으니 SQL문을 작성해봅시다.
  • resource > mapper > Main_SQL.xml을 만들었습니다.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">


<!-- 프로젝트에서는 기본적으로 여러개의 <mapper>를 가지기 때문에 중복되는 이름을 가진 SQL이 존재할 수 있다.
따라서 각 <mapper>마다 namespace 속성을 이용하여 <mapper>간 유일성을 보장해야 한다.
여기서는 sample이라는 이름의 namespace를 사용하였다.-->
<mapper namespace="mainList">

<select id="selectBoardList" parameterType="hashmap" resultType="hashmap">
    <![CDATA[
  SELECT
      IDX,
      TITLE,
      HIT_CNT,
      CREA_DTM
  FROM
      TB_BOARD
  WHERE
      DEL_GB = 'N'
  ORDER BY IDX DESC
  ]]>
</select>
</mapper>

jsp화면 초기화

  • 마지막으로 가져온 데이터를 뿌려줄 jsp파일 입니다.
  • jstl을 사용하여 뿌렸습니다.
<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

<!DOCTYPE html>
<html>
<head>
<title>first</title>

</head>
<body>
  <h2>게시판 목록</h2>
  <table style="border: 1px solid #ccc">
    <colgroup>
      <col width="10%" />
      <col width="*" />
      <col width="15%" />
      <col width="20%" />
    </colgroup>
    <thead>
      <tr>
        <th scope="col">글번호</th>
        <th scope="col">제목</th>
        <th scope="col">조회수</th>
        <th scope="col">작성일</th>
      </tr>
    </thead>
    <tbody>
      <c:choose>
        <c:when test="${fn:length(list) > 0}">
          <c:forEach items="${list }" var="row">
            <tr>
              <td>${row.IDX }</td>
              <td>${row.TITLE }</td>
              <td>${row.HIT_CNT }</td>
              <td>${row.CREA_DTM }</td>
            </tr>
          </c:forEach>
        </c:when>
        <c:otherwise>
          <tr>
            <td colspan="4">조회된 결과가 없습니다.</td>
          </tr>
        </c:otherwise>
      </c:choose>

    </tbody>
  </table>
</body>
</html>

Reference