文件名称:
Struts2DesignAndProgramming
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文件大小: 10mb
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上传时间: 2009-09-16
详细说明： "Struts 2 Design and Programming" is a tutorial for Struts 2 by Budi Kurniawan. When it comes to the web application parts of Struts, it's very good and surprisingly thorough, but when it comes to other things, it's a little less well-informed. The b ook starts off by walking through Model 1 and Model 2 web development, introducing a short example of both designs. After that, you get chapter after chapter covering Struts from top to bottom, from the tags to FreeMarker to Velocity, OGNL to interceptors, security, file uploads and downloads, progress meters, custom result types, security... when it comes to Struts' core features, the book is quite good. However, there are a few oddities. Chapter 24 covers Tiles plugins, and while Tiles is certainly popular enough, the lack of coverage of SiteMesh – which does many of the same things, except with less intrusion. It's not so much that Tiles shouldn't have been covered, but choosing one while ignoring the other stood out some. The worst offender, though, is the persistence chapter, chapter 11. It focuses primarily on the DAO pattern, which isn't the worst pattern one could choose... but in a book printed in 2008, ignoring JPA and Spring seems a little out of place. Spring doesn't even get mentioned; Hibernate gets this: Hibernate has gained popularity in the past few years as an add-on for Java EE and other applications. Its web site (www.hibernate.org) advertises this free product as "a powerful, ultra-high performance object/relational persistence and query service for Java." Using Hibernate, you do not need to implement your own persistence layer. Instead, you use a tool to create databases and related tables and determine how your objects should be persisted. Hibernate virtually supports all kinds of database servers in the market today, and its Hibernate Query Language provides "an elegant bridge between the object and relational worlds." More people will be using Hibernate in the near future. If you have time, invest in it. Of course, persistence is a huge topic to cover... but choosing to address only DAO while offering Hibernate one paragraph seems a little odd, especially considering the presence of JPA. In addition, some of the design choices of the DAO seem odd: one example is that JNDI lookups are considered an "expensive operation." Compared to what? The author caches the datasource, which eliminates the whole reason for using a Datasource in JNDI in the first place (live container management of the resource), and in tests, retrieving a datasource from JNDI isn't especially expensive... What's more, if the author had focused on Hibernate instead, it would have been a non-issue in the first place. Even with that, though, it's actually a very good and very useful book. Struts 2 is covered in enough detail that even new users can get up to speed in a fairly short time, with understanding of what's going on inside the framework. Examples are fairly clear, and illustrative of actual needs ...展开收缩
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