在map中根据value获取key

原文：http://blog.csdn.net/mexican_jacky/article/details/51789548

//根据map的value获取map的key
    private static String getKey(Map<String,String> map,String value){
        String key="";
        for (Map.Entry<String, String> entry : map.entrySet()) {
            if(value.equals(entry.getValue())){
                key=entry.getKey();
            }
        }
        return key;
    }