获得 客户机的 请求 的时候 带过来的请求头信息

[java]代码库

package pm_cn.itcast.request;

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

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

public class RequestDemo2 extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		// 获得 客户机的 请求 的时候 带过来的请求头信息 
		
		String value = request.getHeader("Accept-Language");
		System.out.println(" Accept-Language : " + value);
		
		System.out.println("===================");
		// 获得 所有的请求头的 信息 :
		
		Enumeration<String> names = request.getHeaderNames();
		while(names.hasMoreElements()){
			String name = names.nextElement();  // 获得 每个头的 名称
			// 获得头的 值 
			String value2 = request.getHeader(name);
			System.out.println(name + ": " +value2 );
		}
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request, response);
	}

}