URLDNS

hash()

URL

SilentURLStreamHandler()

hash(key)

key.hashCode()

key:URL类型对象

HashMap

getHostAddress()

InetAddress.getByName(host)

InetAddress.getByName()

hashCode()

handler.hashCode()

readObject()

URLStreamHandler handler = new SilentURLStreamHandler();

value:触发payload的url

key.hashCode