spring mvc : servlet - HttpServletResponse

spring-mvc/servlet/src/main/java/com/example/servlet/basic/response/ResponseHeaderServlet.java

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+package com.example.servlet.basic.response;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@WebServlet("/response-header")
+public class ResponseHeaderServlet extends HttpServlet {
+
+    @Override
+    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        // [status-line]
+        response.setStatus(HttpServletResponse.SC_OK); // 상태 코드
+
+        // [response-header]
+//        response.setHeader("Content-Type", "text/plain;charset=utf-8");
+        response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // 캐시 무효화
+        response.setHeader("Pragma", "no-cache"); // 캐시 무효화
+        response.setHeader("my-header", "hello"); // 사용자 생성 헤더 값 추가
+
+        //[Header 편의 메서드]
+        content(response);
+        cookie(response);
+        redirect(response);
+
+        // [message-body]
+        response.getWriter().write("ok");
+    }
+
+    private void content(HttpServletResponse response) {
+        //Content-Type: text/plain;charset=utf-8
+        //Content-Length: 2
+        //response.setHeader("Content-Type", "text/plain;charset=utf-8");
+        response.setContentType("text/plain");
+        response.setCharacterEncoding("utf-8");
+        //response.setContentLength(2); //(생략시 자동 생성)
+    }
+
+    private void cookie(HttpServletResponse response) {
+        //Set-Cookie: myCookie=good; Max-Age=600;
+        //response.setHeader("Set-Cookie", "myCookie=good; Max-Age=600");
+        Cookie cookie = new Cookie("myCookie", "good");
+        cookie.setMaxAge(600); //600초
+        response.addCookie(cookie);
+    }
+
+    private void redirect(HttpServletResponse response) throws IOException {
+        //Status Code 302
+        //Location: /basic/hello-form.html
+        //response.setStatus(HttpServletResponse.SC_FOUND); //302
+        //response.setHeader("Location", "/basic/hello-form.html");
+        response.sendRedirect("/basic/hello-form.html");
+    }
+}