java Map遍历获取key,value值

// 暴力模式得到key,value值

Map map = (Map)obj;

  System.out.println("map.size()--->" + map.size());

  Iterator   iterator = map.entrySet().iterator();

  while (iterator.hasNext()) {

   Map.Entry  mapentry = (Map.Entry) iterator.next();

   System.out.println("key===>"+mapentry.getKey() + "<<<==value===>>>" + mapentry.getValue());

  }