java Map集合遍历取值的五种方式

map.forEach((k, v) -> {
　　System.out.println("key:value = " + k + “:” + v);
　　if (k.equals(“test”)) {
　　//map.put(k, JsonUtil.fromJson((String) v, List.class));
　　}
});

for(String key:map.keySet()){
　　String value = map.get(key).toString();//
　　System.out.println(“key:”+key+" vlaue:"+value);
}

Iterator<Entry<String, Object>> it = map.entrySet().iterator();
while(it.hasNext()){
　　Entry<String, Object> entry = it.next();
　　System.out.println(“key:”+entry.getKey()+" key:"+entry.getValue());
}

for (Map.Entry<String, Object> m : map.entrySet()) {
    System.out.println(“key:” + m.getKey() + " value:" + m.getValue());
}

for(Object m:map.values()){
    System.out.println(m);
}