java 获取HttpRequest Header 的几种方法

Java代码获取：

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/site")
public class SiteController {
    @Autowired
    private HttpServletRequest request;
    @RequestMapping(value = "/{input:.+}", method = RequestMethod.GET)
    public ModelAndView getDomain(@PathVariable("input") String input) {
        ModelAndView modelandView = new ModelAndView("result");
        modelandView.addObject("user-agent", getUserAgent());
        modelandView.addObject("headers", getHeadersInfo());
        return modelandView;
    }
    //get user agent
    private String getUserAgent() {
        return request.getHeader("user-agent");
    }
    //get request headers
    private Map<String, String> getHeadersInfo() {
        Map<String, String> map = new HashMap<String, String>();
        Enumeration headerNames = request.getHeaderNames();
        while (headerNames.hasMoreElements()) {
            String key = (String) headerNames.nextElement();
            String value = request.getHeader(key);
            map.put(key, value);
        }
        return map;
    }
}

JSP代码获取：

<%!
    private HttpServletRequest request;
    private HttpServletResponse response;
%>
<%
    System.out.println("Protocol: " + request.getProtocol() + "<br>");
    System.out.println("Scheme: " + request.getScheme() + "<br>");
    System.out.println("Server Name: " + request.getServerName() + "<br>");
    System.out.println("Server Port: " + request.getServerPort() + "<br>");
    System.out.println("Protocol: " + request.getProtocol() + "<br>");
    System.out.println("Remote Addr: " + request.getRemoteAddr() + "<br>");
    System.out.println("Remote Host: " + request.getRemoteHost() + "<br>");
    System.out.println("Character Encoding: " + request.getCharacterEncoding() + "<br>");
    System.out.println("Content Length: " + request.getContentLength() + "<br>");
    System.out.println("Content Type: " + request.getContentType() + "<br>");
    System.out.println("Auth Type: " + request.getAuthType() + "<br>");
    System.out.println("HTTP Method: " + request.getMethod() + "<br>");
    System.out.println("Path Info: " + request.getPathInfo() + "<br>");
    System.out.println("Path Trans: " + request.getPathTranslated() + "<br>");
    System.out.println("Query String: " + request.getQueryString() + "<br>");
    System.out.println("Remote User: " + request.getRemoteUser() + "<br>");
    System.out.println("Session Id: " + request.getRequestedSessionId() + "<br>");
    System.out.println("Request URL: " + request.getRequestURL() + "<br>");
    System.out.println("Request URI: " + request.getRequestURI() + "<br>");
    System.out.println("Servlet Path: " + request.getServletPath() + "<br>");
    System.out.println("Created : " + session.getCreationTime() + "<br>");
    System.out.println("LastAccessed : " + session.getLastAccessedTime() + "<br>");
    System.out.println("Accept: " + request.getHeader("Accept") + "<br>");
    System.out.println("Host: " + request.getHeader("Host") + "<br>");
    System.out.println("Referer : " + request.getHeader("Referer") + "<br>");
    System.out.println("Accept-Language : " + request.getHeader("Accept-Language") + "<br>");
    System.out.println("Accept-Encoding : " + request.getHeader("Accept-Encoding") + "<br>");
    System.out.println("User-Agent : " + request.getHeader("User-Agent") + "<br>");
    System.out.println("Connection : " + request.getHeader("Connection") + "<br>");
    System.out.println("Cookie : " + request.getHeader("Cookie") + "<br>");
%>