ksy90101/HeaderServlet.java

## HeaderServlet.java
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("/HeaderServlet")
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;charset=utf-8");
		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>");
	}
}

## InfoServlet.java
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;

@WebServlet("/InfoServlet")
public class InfoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

    public InfoServlet() {
        super();
    }

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();

		out.println("<html>");
		out.println("<head><title>form</title></head>");
		out.println("<body>");

		String uri = request.getRequestURI();
		StringBuffer url = request.getRequestURL();
		String contentPath = request.getContextPath();
		String remoteAddr = request.getRemoteAddr();

		out.println("uri : " + uri + "<br/>");
		out.println("url : " + url + "<br/>");
		out.println("contentPath : " + contentPath + "<br/>");
		out.println("remteAddr : " + remoteAddr + "<br/>");

		out.println("</body>");
		out.println("</html>");
	}

}

## ParamterServlet.java
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;

@WebServlet("/ParamterServlet")
public class ParamterServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

    public ParamterServlet() {
        super();
    }

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		out.println("<html>");
		out.println("<head><title>form</title></head>");
		out.println("<body>");

		String name = request.getParameter("name");
		String age = request.getParameter("age");

		out.println("name : " + name + "<br/>");
		out.println("age : " + age);

		out.println("</body>");
		out.println("</html>");
	}
}
	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("/HeaderServlet")
	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;charset=utf-8");
	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>");
	}
	}