httpServlet response 응답
응답메세지를 생성한다!
HTTP 응답코드 지정(200,400,500등등)
응답 헤더 생성
- 쿠키 보내주기
- 리다이렉션
응답 바디 생성
HTTP 응답 코드 생성
@WebServlet(name = "responseHeaderServlet", urlPatterns = "/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);
//[response-header]
response.setHeader("Content-Type","text/plain;charset=utf-8");
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setHeader("Pragma", "no-cache");
response.setHeader("my-header","hello");
response.getWriter().write("ok");
}
}
응답 데이터
- 텍스트
response.getWriter().write("ok");- html
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter writer = response.getWriter();
writer.println("<html>");
writer.println("<body>");
writer.println(" <div>안녕?</div>");
writer.println("</body>");
writer.println("</html>");- api
@WebServlet(name = "responseJsonServlet", urlPatterns = "/response-json")
public class ResponseJsonServlet extends HttpServlet {
private ObjectMapper objectMapper = new ObjectMapper();
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json");
response.setCharacterEncoding("utf-8");
PrintWriter writer = response.getWriter();
HelloData helloData = new HelloData();
helloData.setUsername("park");
helloData.setAge(29);
String result = objectMapper.writeValueAsString(helloData);
response.getWriter().write(result);
}
}
사람들을 돕는 문제 해결사, 개발자 sudong입니다. 반갑습니다. tkddlsqkr21@gmail.com