Map<String, String[]> params = request.getParameterMap(); // 请求提交的参数
        Set<Entry<String, String[]>> set = params.entrySet();  
        Iterator<Entry<String, String[]>> it = set.iterator();  
        while (it.hasNext()) {  
            Entry<String, String[]> entry = it.next();  
   
            System.out.println("KEY:"+entry.getKey());  
            for (String i : entry.getValue()) {  
                System.out.println(i);  
            }  
        }