Map集合遍历

Posted 2021-02-11 it-mh

1.遍历key-Value

ConcurrentHashMap<String, Object> map= new ConcurrentHashMap<String, Object>();//Object替换为结构类

for(String key :map.keySet()){
    Object object= map.get(key);
}

2.遍历Value

ConcurrentHashMap<String, Object> map= new ConcurrentHashMap<String, Object>();//Object替换为结构类

Iterator<Entry<String, Object>> it = map.entrySet().iterator();
while (it.hasNext()) {
    Entry<String, Object> entry = (Entry<String, Object>) it.next();
    Object object= entry.getValue();
}