(The book is divided into 18 chapters. Each chapter corresponds to each period of developing web applications using j2ee and weblogic server, and is arranged around specific java enterprise technologies, including model view controller design pattern, jdbc database connection, remote method call, jms, ejb, java mail, unit testing, scheme deployment, etc. This book is very practical, and comments on each technology are interspersed with examples. Finally, the book also comments on the creation of a large example of an online auction site, which is of great practical value. This book specifically comments on ejb, which is now the leading role of j2ee application development. This book is a good textbook for learning how to develop j2ee application programs on the weblogic platform. It is suitable for developers in a wide range of enterprises. Both beginners and experienced developers of weblogic can benefit from the book.)