包含①《Instant Messaging in Java,The Jabber Protocols》、②《Developing Applications Using Jabber》、③RFC-3920、④RFC-3921。 ①英文文档，详细分析jabber协议。This book is dedicated to the Jabber community: innovation, insight and fun. Who could ask for anything more? ②英文文档。This code-rich reference includes many applications,