request功能获取请求头数据

获取请求头数据：request方法

（*重要）String getHeader(String name)：通过请求头的名称获取请求头的值

Enumeration<String> getHeaderNames():获取所有的请求头名称

 1 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 2         //获取所有请求头名称
 3         Enumeration<String> headerNames = request.getHeaderNames();
 4         while (headerNames.hasMoreElements()) {
 5             String name = headerNames.nextElement();
 6             //根据名称获取请求头的值
 7             String value = request.getHeader(name);
 8             System.out.println(name+"---"+value);
 9         }
10 
11     }