Map循环遍历的五种方法

第一种

Set set = map.keySet();
for (Object o : set) {
    System.out.println(o+""+map.get(o));
}

第二种
Set set = map.keySet();
Iterator iterator = set.iterator();
while (iterator.hasNext()){
    Object next = iterator.next();
    System.out.println("key为："+next+",value为："+map.get(next));
}
第三种
Set<Map.Entry<String, FactoryStatus>> entries = map.entrySet();
Iterator<Map.Entry<String, FactoryStatus>> iterator1 = entries.iterator();
while (iterator1.hasNext()){
    Map.Entry<String, FactoryStatus> next = iterator1.next();
    System.out.println("方法三的key为："+next.getKey()+",value为："+next.getValue());
}

第四种Collection<FactoryStatus> values = map.values();
for (FactoryStatus value : values) {
    System.out.println("方法四的value为："+value);
}

第五种
Set<Map.Entry<String, FactoryStatus>> entries = map.entrySet();
for (Map.Entry<String, FactoryStatus> entry : entries) {
    System.out.println("方法五的key为："+entry.getKey()+",value为："+entry.getValue());
}