Java Map 操作

Map<String, String> map= new HashMap<String, String>();

map.put("aa", "UPDATE");

map.put("bb", "INSERT"); 

for (Object o : map.keySet())

{

System.out.println(o.toString() + "__" + m.get(o));

} 

转载于:https://www.cnblogs.com/andy_tigger/archive/2011/05/07/2039907.html