好記性不如賴筆頭…………

    //獲取請求方式
        System.out.println(req.getMethod());
        //獲取專案名稱
        System.out.println(req.getContextPath());
        //獲取完整請求路徑
        System.out.println(req.getRequestURL());
        //獲取除了域名外的請求資料
        System.out.println(req.getRequestURI());
        //獲取請求引數
        System.out
 
.println(req.getQueryString());
        System.out.println("----------------------------------------------------------");
        //獲取請求頭
        String header = req.getHeader("user-Agent");
        System.out.println(header);
        header = header.toLowerCase();
        //根據請求頭資料判斷瀏覽器型別
        if(header.contains
 
("chrome")){
            System.out.println("您的訪問瀏覽器為谷歌瀏覽器");
        }else if(header.contains("msie")){
            System.out.println("您的訪問瀏覽器為IE瀏覽器");
        }else if(header.contains("firefox")){
            System.out.println("您的訪問瀏覽器為火狐瀏覽器");
        }else{
            System.out.println("您的訪問瀏覽器為其它瀏覽器"
 
);
        }
        System.out.println("----------------------------------------------------------");
        //獲取所有的訊息頭名稱
        Enumeration<String> headerNames = req.getHeaderNames();
        //獲取獲取的訊息頭名稱，獲取對應的值，並輸出
        while(headerNames.hasMoreElements()){
            String nextElement = headerNames.nextElement();
            System.out.println(nextElement+":"+req.getHeader(nextElement));
        }
        System.out.println("----------------------------------------------------------");
        //根據名稱獲取此重名的所有資料
        Enumeration<String> headers = req.getHeaders("accept");
        while (headers.hasMoreElements()) {
            String string = (String) headers.nextElement();
            System.out.println(string);
        }

結果如下：

GET
/httpServletRequest
http://localhost:8080/httpServletRequest/index1
/httpServletRequest/index1
name=ckinghan&password=admin
----------------------------------------------------------
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36
您的訪問瀏覽器為谷歌瀏覽器
----------------------------------------------------------
host:localhost:8080
connection:keep-alive
cache-control:max-age=0
upgrade-insecure-requests:1
user-agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36
accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
accept-encoding:gzip, deflate, sdch, br
accept-language:zh-CN,zh;q=0.8
----------------------------------------------------------
text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8