controller/MemberJoinId.java > MODEL2

package controller.member;

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 dao.MemberDAO;

@WebServlet("/member/id_ok")

public class MemberJoinId extends HttpServlet {

private static final long serialVersionUID = 1L;

    public MemberJoinId() {

        super();

    }

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

String id = request.getParameter("id");

String msg = "";

MemberDAO dao = new MemberDAO();

int num = dao.loginSelect(id); //존재여부 확인

if(id.length() < 4) {

msg = "4";

}else if(num == 1) {

msg = "1";

}else if(num == 0) {

msg = "0";

}

response.setContentType("html/text; charset=utf-8"); // 출력구문 한글 깨짐 방지

PrintWriter out = response.getWriter();

out.print(msg);

}

}