requestheaders.java

servlet学习代码

package jsp.servlet.chapter4.request.header;

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

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@SuppressWarnings("serial")
public class RequestHeaders extends HttpServlet {
	public void doGet(HttpServletRequest request, 
			HttpServletResponse response) throws IOException{
		
		PrintWriter out = response.getWriter();
		Enumeration headers = request.getHeaderNames();
		String header, headerValue;
		out.println("<h1 align=\"center\">Get Request Headers</h1> <br><br>");
		out.println("request Method: " + request.getMethod() + "<br><br>");
		out.println("RequestURI: " + request.getRequestURI() + "<br><br>");
		out.println("request Protocol: " + request.getProtocol() + "<br><br>");
		while(headers.hasMoreElements()){
			header = (String) headers.nextElement();
			headerValue = request.getHeader(header);
			out.println(header + ": " + headerValue + "<br><br>");
		}
		
	}
	
	public void doPost(HttpServletRequest request, 
			HttpServletResponse response) throws IOException{
		doGet(request, response);
	}
}