Spring

아파치만 실행 VS 톰캣 실행

Jan 25, 2024
아파치만 실행 VS 톰캣 실행
Contents

1. 아파치만 실행하기

  • 톰캣을 사용안하려면 컴파일 안하면 됨
  • 순수하게 그림밖에 못그림
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HTML 파일 생성해서 아파치만으로 HTML 파일 찾아서 응답해주기
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>test page</h1>
</body>
</html>
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2. 톰캣 실행하기

  • 동적 페이지로 만들기
String html = "
								html 코드 붙여넣기
							";

String html = """
								html 코드 붙여넣기
							"""; // 자바 15이상부터 지원
package com.example.userapp;

import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.time.LocalDateTime;

@WebServlet("/join-form")
public class JoinFormServlet extends HttpServlet {

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        LocalDateTime now = LocalDateTime.now();

        String html = "<!DOCTYPE html>\n" +
                "<html lang=\"en\">\n" +
                "<head>\n" +
                "    <meta charset=\"UTF-8\">\n" +
                "    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n" +
                "    <title>Document</title>\n" +
                "</head>\n" +
                "<body>\n" +
                "    <h1>회원가입 페이지"+now+"</h1>\n" +
                "    <hr>\n" +
                "    <form action=\"/join\" method=\"post\">\n" +
                "        <input type=\"text\" placeholder=\"username\" name=\"username\">\n" +
                "        <input type=\"text\" placeholder=\"password\" name=\"password\">\n" +
                "        <input type=\"text\" placeholder=\"email\" name=\"email\">\n" +
                "        <button>회원가입</button>\n" +
                "    </form>\n" +
                "</body>\n" +
                "</html>";
        resp.getWriter().println(html);
    }

}
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  • Servlet은 버퍼에 데이터를 담아서 자바 코드를 돌릴 수 있음
자바 변수에 html 코드를 담고 섞어놓을 수 있음
http 문장; //html 끊기
for (int i = 0; i < 5; i++) {	// for문으로 5번 돌리기   
		html = html + "    <h1>"+i+"회원가입 페이지"+now+"</h1>\n"; 
}

html = html + "나머지 http문장";
package com.example.userapp;

import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.time.LocalDateTime;

@WebServlet("/join-form")
public class JoinFormServlet extends HttpServlet {

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        LocalDateTime now = LocalDateTime.now();

        String html = "<!DOCTYPE html>\n" +
                "<html lang=\"en\">\n" +
                "<head>\n" +
                "    <meta charset=\"UTF-8\">\n" +
                "    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n" +
                "    <title>Document</title>\n" +
                "</head>\n" +
                "<body>\n"; //html 끊기
                for (int i = 0; i < 5; i++) {
                    html = html + "    <h1>"+i+"회원가입 페이지"+now+"</h1>\n"; // for문으로 5번 돌아감
                }

               html = html + "<hr>\n" +
                "    <form action=\"/join\" method=\"post\">\n" +
                "        <input type=\"text\" placeholder=\"username\" name=\"username\">\n" +
                "        <input type=\"text\" placeholder=\"password\" name=\"password\">\n" +
                "        <input type=\"text\" placeholder=\"email\" name=\"email\">\n" +
                "        <button>회원가입</button>\n" +
                "    </form>\n" +
                "</body>\n" +
                "</html>";
        resp.getWriter().println(html);
    }

}
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너무 복잡함..css 넣는 것도 불편함…
 
  • 현재 상태 : 페이지가 없어서 오류 남 → 페이지를 만들어야 함
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  • 페이지 생성하기
package com.example.userapp.user;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.BufferedReader;
import java.io.IOException;

@WebServlet("/join")
public class JoinServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // username=ssar&password=1234&email=ssar@nate.com

        BufferedReader br = req.getReader();

        String requestBody = "";

        while(true){
            String line = br.readLine();

            if(line == null) break;

            requestBody = requestBody + line;
        }
        System.out.println(requestBody);
    }
}
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  • 페이지 생성하기 - 톰켓이 제공하는 메서드 사용하기
package com.example.userapp.user;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;

@WebServlet("/join")
public class JoinServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // username=ssar&password=1234&email=ssar@nate.com

        // 1. 파싱 쉽게 하기 -> 커퍼에 키값을 찾아줌
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        String email = req.getParameter("email");

        System.out.println("username : " + username);
        System.out.println("password : " + password);
        System.out.println("email : " + email);
    }
}
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💡
버퍼는 꺼내면 소비됨 ⇒ 버퍼에 담긴 것이 없음
 
  • 유효성 검사
package com.example.userapp.user;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;

@WebServlet("/join")
public class JoinServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // username=ssar&password=1234&email=ssar@nate.com

        // 1. 파싱 쉽게 하기 -> 버퍼에 있는 값을 split해서 key값을 찾아줌
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        String email = req.getParameter("email");

        System.out.println("username : " + username);
        System.out.println("password : " + password);
        System.out.println("email : " + email);

        // 2. 유효성 검사(1000줄 정도 됨...)
        if(username.length() < 3 || username.length() > 10) { // 필터링으로 사용
            resp.setHeader("Content-type", "text/html; charset=utf-8"); //헤더에 바디를 설명
            resp.getWriter().println("<h1>username 글자수가 3~10 사이여야 합니다.");
        }
    }
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한글 깨짐 해결 → 헤더에 바디를 설명
resp.setHeader("Content-type", "text/html; charset=utf-8");
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  • 메인 페이지 그리기
package com.example.userapp.user;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;

@WebServlet("/join")
public class JoinServlet extends HttpServlet {
    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setHeader("Content-type", "text/html; charset=utf-8"); //헤더에 바디를 설명
        // username=ssar&password=1234&email=ssar@nate.com

        // 1. 파싱 쉽게 하기 -> 버퍼에 있는 값을 split해서 key값을 찾아줌
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        String email = req.getParameter("email");

        System.out.println("username : " + username);
        System.out.println("password : " + password);
        System.out.println("email : " + email);

        // 2. 유효성 검사(1000줄 정도 됨...)
        if(username.length() < 3 || username.length() > 10) { // 필터링으로 사용
            resp.getWriter().println("<h1>username 글자수가 3~10 사이여야 합니다.");
        }

        // 3. DB연결 -> DAO에 연결하기 위함
        // 4. DAO의 insert 메서드를 회출
        // 5. 메인 페이지 그리기
        String html = "<!DOCTYPE html>\n" +
                "<html lang=\"en\">\n" +
                "\n" +
                "<head>\n" +
                "    <meta charset=\"UTF-8\">\n" +
                "    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n" +
                "    <title>Document</title>\n" +
                "</head>\n" +
                "\n" +
                "<body>\n" +
                "    <h1>메인 페이지</h1>\n" +
                "    <hr>\n" +
                "</body>\n" +
                "\n" +
                "</html>";
        resp.getWriter().println(html);
    }
}
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