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네이버클라우드/JAVA 웹 프로그래밍

JAVA 56일차 (2023-08-09) 자바 프로그래밍_56. 웹 애플리케이션 자바 표준 기술 JavaEE 도입_개인프로젝트 - 마트 관리 시스템

by prometedor 2023. 8. 9.

한글 깨짐 현상 해결하기

 

request.setCharacterEncoding("UTF-8");

ㄴ 해당 코드를 추가해서 한글 깨짐을 방지하기

=>

BoardAddServlet.java

package bitcamp.report.handler;

import java.io.IOException;
import java.io.PrintWriter;
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 bitcamp.report.vo.Board;
import bitcamp.report.vo.Member;

@WebServlet("/board/add")
public class BoardAddServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

    Member loginUser = (Member) request.getSession().getAttribute("loginUser");
    if (loginUser == null) {
      response.sendRedirect("/auth/form.html");
      return;
    }

    request.setCharacterEncoding("UTF-8");

    int category = Integer.parseInt(request.getParameter("category"));

    Board board = new Board();
    board.setTitle(request.getParameter("title"));
    board.setContent(request.getParameter("content"));
    board.setWriter(loginUser);
    board.setCategory(category);

    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<meta charset='UTF-8'>");
    out.printf("<meta http-equiv='refresh' content='1;url=/board/list?category=%d'>\n", category);
    out.println("<title>게시글</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<h1>게시글 등록</h1>");
    try {
      InitServlet.boardDao.insert(board);
      InitServlet.sqlSessionFactory.openSession(false).commit();
      out.println("<p>등록 성공입니다!</p>");
    } catch (Exception e) {
      InitServlet.sqlSessionFactory.openSession(false).rollback();
      out.println("<p>등록 실패입니다!</p>");
      e.printStackTrace();
    }
    out.println("</body>");
    out.println("</html>");
  }

}

 

BoardUpdateServlet.java

package bitcamp.report.handler;

import java.io.IOException;
import java.io.PrintWriter;
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 bitcamp.report.vo.Board;
import bitcamp.report.vo.Member;

@WebServlet("/board/update")
public class BoardUpdateServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

    Member loginUser = (Member) request.getSession().getAttribute("loginUser");
    if (loginUser == null) {
      response.sendRedirect("/auth/form.html");
      return;
    }

    request.setCharacterEncoding("UTF-8");

    int category = Integer.parseInt(request.getParameter("category"));

    Board board = new Board();
    board.setNo(Integer.parseInt(request.getParameter("no")));
    board.setTitle(request.getParameter("title"));
    board.setContent(request.getParameter("content"));
    board.setWriter(loginUser);
    board.setCategory(category);

    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<meta charset='UTF-8'>");
    out.printf("<meta http-equiv='refresh' content='1;url=/board/list?category=%d'>", category);
    out.println("<title>게시글</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<h1>게시글 변경</h1>");

    try {
      if (InitServlet.boardDao.update(board) == 0) {
        out.println("<p>게시글이 없거나 변경 권한이 없습니다.</p>");
      } else {
        out.println("<p>변경했습니다!</p>");
      }
      InitServlet.sqlSessionFactory.openSession(false).commit();

    } catch (Exception e) {
      InitServlet.sqlSessionFactory.openSession(false).rollback();
      out.println("<p>게시글 변경 실패입니다!</p>");
      e.printStackTrace();
    }
    out.println("</body>");
    out.println("</html>");
  }

}

 

ItemAddServlet.java

package bitcamp.report.handler;

import java.io.IOException;
import java.io.PrintWriter;
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 bitcamp.report.vo.Item;

@WebServlet("/item/add")
public class ItemAddServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    request.setCharacterEncoding("UTF-8");

    Item item = new Item();
    item.setName(request.getParameter("name"));
    item.setPrice(Integer.parseInt(request.getParameter("price")));
    item.setType(request.getParameter("type"));

    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<meta charset='UTF-8'>");
    out.printf("<meta http-equiv='refresh' content='1;url=/item/list'>");
    out.println("<title>물품</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<h1>물품 등록</h1>");

    try {
      InitServlet.itemDao.insert(item);
      InitServlet.sqlSessionFactory.openSession(false).commit();
      out.println("<p>등록 성공입니다!</p>");

    } catch (Exception e) {
      InitServlet.sqlSessionFactory.openSession(false).rollback();
      out.println("<p>등록 실패입니다!</p>");
      e.printStackTrace();
    }

    out.println("</body>");
    out.println("</html>");
  }

}

 

ItemUpdateServlet.java

package bitcamp.report.handler;

import java.io.IOException;
import java.io.PrintWriter;
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 bitcamp.report.vo.Item;

@WebServlet("/item/update")
public class ItemUpdateServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    request.setCharacterEncoding("UTF-8");

    Item item = new Item();
    item.setNo(Integer.parseInt(request.getParameter("no")));
    item.setName(request.getParameter("name"));
    item.setPrice(Integer.parseInt(request.getParameter("price")));
    item.setType(request.getParameter("type"));

    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<meta charset='UTF-8'>");
    out.printf("<meta http-equiv='refresh' content='1;url=/item/list'>");
    out.println("<title>물품</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<h1>물품 변경</h1>");

    try {
      if (InitServlet.itemDao.update(item) == 0) {
        out.println("<p>물품이 없습니다.</p>");
      } else {
        InitServlet.sqlSessionFactory.openSession(false).commit();
        out.println("<p>변경했습니다!</p>");
      }
    } catch (Exception e) {
      InitServlet.sqlSessionFactory.openSession(false).rollback();
      out.println("<p>변경 실패입니다!</p>");
      e.printStackTrace();
    }

    out.println("</body>");
    out.println("</html>");
  }

}

 

MemberAddServlet.java

package bitcamp.report.handler;

import java.io.IOException;
import java.io.PrintWriter;
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 bitcamp.report.vo.Member;

@WebServlet("/member/add")
public class MemberAddServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    request.setCharacterEncoding("UTF-8");

    Member m = new Member();
    m.setName(request.getParameter("name"));
    m.setPhone(request.getParameter("phone"));
    m.setPassword(request.getParameter("password"));
    m.setPosition(request.getParameter("position").charAt(0));

    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<meta charset='UTF-8'>");
    out.printf("<meta http-equiv='refresh' content='1;url=/member/list'>");
    out.println("<title>직원</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<h1>직원 등록</h1>");

    try {
      InitServlet.memberDao.insert(m);
      InitServlet.sqlSessionFactory.openSession(false).commit();
      out.println("<p>등록 성공입니다!</p>");

    } catch (Exception e) {
      InitServlet.sqlSessionFactory.openSession(false).rollback();
      out.println("<p>등록 실패입니다!</p>");
      e.printStackTrace();
    }

    out.println("</body>");
    out.println("</html>");
  }
}

 

MemberUpdateServlet.java

package bitcamp.report.handler;

import java.io.IOException;
import java.io.PrintWriter;
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 bitcamp.report.vo.Member;

@WebServlet("/member/update")
public class MemberUpdateServlet extends HttpServlet {

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    request.setCharacterEncoding("UTF-8");

    Member member = new Member();
    member.setNo(Integer.parseInt(request.getParameter("no")));
    member.setName(request.getParameter("name"));
    member.setPhone(request.getParameter("phone"));
    member.setPassword(request.getParameter("password"));
    member.setPosition(request.getParameter("position").charAt(0));

    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    out.println("<!DOCTYPE html>");
    out.println("<html>");
    out.println("<head>");
    out.println("<meta charset='UTF-8'>");
    out.printf("<meta http-equiv='refresh' content='1;url=/member/list'>");
    out.println("<title>직원</title>");
    out.println("</head>");
    out.println("<body>");
    out.println("<h1>직원 변경</h1>");

    try {
      if (InitServlet.memberDao.update(member) == 0) {
        out.println("<p>회원이 없습니다.</p>");
      } else {
        InitServlet.sqlSessionFactory.openSession(false).commit();
        out.println("<p>변경했습니다!</p>");
      }

    } catch (Exception e) {
      InitServlet.sqlSessionFactory.openSession(false).rollback();
      out.println("<p>변경 실패입니다!</p>");
      e.printStackTrace();
    }

    out.println("</body>");
    out.println("</html>");
  }

}

 

 

Filter 를 이용하는 방법

ㄴ bitcamp.report.filter 패키지 생성

 

ㄴ CharacterEncodingFilter 라는 이름의 클래스 생성

 

CharacterEncoding.java

ㄴ javax.servlet.Filter 를 구현하도록 함

=>

CharacterEncodingFilter.java

=>

CharacterEncodingFilter.java

ㄴ 서블릿 필터를 모든 URL 패턴에 매핑시키도록 함

    => 웹 애플리케이션 내에서 모든 요청에 이 서블릿 필터가 적용됨

 

CharacterEncodingFilter.java

ㄴ CharacterEncodingFilter.doFilter() 가  언제 호출되는지 확인하기위한 출력코드 작성

=>

ㄴ favicon 만 호출되어도 CharacterEncoding.doFilter() 가 호출됨을 확인할 수 있음

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