request和response的几个实际使用，requestresponse

request和response的几个实际使用，requestresponse

//通过request得到request的header的值 
Enumeration e=request.getHeaderNames(); 
while(e.hasMoreElements()){ 
   String key=(String)e.nextElement(); 
   String value=(String)request.getHeader(key);                  }

//防止盗链 
String s=request.getHeader("referer"); if("http://www.javakc.com".equals(s)){                     
       System.out.println("请求是从java快车的页面链接来的"); 
}

//通过request取得Cookie 
Cookie[] cookies = request.getCookies(); 
   for ( int i=0; i < cookies.length; i++ ) { 
      String key =cookies[i].getName(); String value = cookies[i].getValue();         
                     System.out.println("cook"+i+":key="+key+",value="+value); }

//获取路径的方法对比,
String s1=request.getContextPath(); 
String s2=request.getServletPath(); 
//获取uri
String s3=request.getRequestURI(); 
//获取url
StringBuffer sb=request.getRequestURL();
//服务器名称
String str=request.getServerName();
//获得"http"
String http=request.getScheme();
//获取端口号
String port=request.getServerPort();

//设置HTTP头标 
//５秒后自动刷新并转到http://..... response.setHeader("Refresh","5;URL=http://www.javakc.com"); 
//设置cookie 
Cookie c=new Cookie("cookieKey","cookieValue"); response.addCookie(c); 
//设定响应的content类型 response.setContentType("text/html"); response.setContentType("application/msword;charset=GB2312");