Request, Response 객체2 - header 읽기

oyeon·2021년 1월 8일
0
  • header 정보를 읽어들이는 HttpServletRequest 객체의 getHeaderNames() 메서드 실습
package examples;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;

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

@WebServlet("/header")
public class HeaderServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    public HeaderServlet() {
        super();
    }
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.println("<html>");
		out.println("<head><title>form</title></head>");
		out.println("<body>");
		
		Enumeration<String> headerNames = request.getHeaderNames();
		while(headerNames.hasMoreElements()) {
			String headerName = headerNames.nextElement();
			String headerValue = request.getHeader(headerName);
			out.println(headerName + " : " + headerValue + " <br> ");
		}
		out.println("</body>");
		out.println("</html>");
	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

결과

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