map--已知key取对应value

比如：

创建Map

Map<String,Object> map = new HashMap<String,Object>();
map.put("cur",curPage);
map.put("startTime",startTime);
map.put("endTime",endTime);
map.put("zjTypes",zjTypes);
map.put("page",page);
map.put("num",num);

取已知key对应的value

Iterator iter = map.entrySet().iterator(); 
while (iter.hasNext()) { 
   Map.Entry<String,Object> entry = (Map.Entry<String,Object>) iter.next(); 
   Object key = entry.getKey(); 
   Object val = entry.getValue(); 
   if("page".equals(key)){
    req.setAttribute("page", (Page)val);
    sess.setAttribute("page", (Page)val);
   }else if("cur".equals(key)){
    req.setAttribute("cur", (String)val);
    sess.setAttribute("cur", (String)val);
   }else if("startTime".equals(key)){
    req.setAttribute("startTime", (String)val);
    sess.setAttribute("startTime", (String)val);
   }else if("endTime".equals(key)){
    req.setAttribute("endTime", (String)val);
    sess.setAttribute("endTime", (String)val);
   }else if("zjTypes".equals(key)){
    req.setAttribute("zjTypes", (String)val);
    sess.setAttribute("zjTypes", (String)val);
   }else if("num".equals(key)){
    num = (Integer)val;
   }
}