同学的中译英327字
近年来，随着Internet及全球化应用的快速发展，越来越多的人像使用其它无国界、无时间、无地域线值的便利环境来拓展经营商务。因此电子商务（Electronic Commerce/EC）便越来越流行，越来越多的企业也想使用该技术与方法进行商业上的交易以降低成本。曾经辉煌过的比如亚马逊、8848都是典型的电子商务公司，虽然他们遇到了不同的挫折，但是电子商务是发展的大势所趋。因为电子商务不仅可以使销售方减少不必要的库存和店面，而且还可以解除一些业务时空上的限制，比如24小时营业。而JSP是一种目前比较流行而且成熟的技术，选择它作为电子商务的实现手段是一个明智的选择。
本文根据电子商务的需求，设计并实现了基于JSP技术的在线购书的电子商务网站，实现了不同权限用户对数据库的不同操作。本文将阐述在设计实现中所用到的技术与方案。
问题点数：100、回复次数：4Top
1 楼qieyj（温馨港湾）回复于 2003-06-03 10:03:57 得分 0
http://qieyj.myrice.com
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注册就有机会成为斑竹Top
2 楼wswhp（greenland）回复于 2003-06-03 14:00:19 得分 0
In recent years, turn the applied fast development along with Internet and worlds, more and more portraits usage other has no the national boundary, have no time and have no the worth and convenient environment in line in region to expand to operate the business.The for this reason electronic commerce( Electronic Commerce/ EC) is popular then and more and more, more and more business enterprises also want to use that technique proceeds with method the bargain on the business since low cost.Glorious ever over of for example Amazon,8848 are all irresistible general trend that typical electronic commerce company, although they met the different frustrate, the electronic commerce is a development.Because the electronic commerce can not only make sell the square reduces the otiose stock with the shop front, but also can also relieve the some business the restrict on the timespace, for example 24 hours runs business.But the JSP is a kind of current popular and mature technique, choose, it be used as the electronic commerce realizes the means is a wise choice.
This text according to the need of the electronic commerce, design and realizes according to the JSP is technical and on-line to buy the electronic commerce website of the book, realizes different legal power customer to the different operation of the database.This text will expatiate at design to realize a technique for using and project.
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3 楼leeloo（夫木）回复于 2003-06-03 14:33:05 得分 0
是不是用快译翻的？
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4 楼huangyi1920（huangyibao）回复于 2003-06-03 14:52:52 得分 100
Immutable objects have a number of properties that make working with them easier, including relaxed synchronization requirements and the freedom to share and cache object references without concern for data corruption. While immutability may not necessarily make sense for all classes, most programs have at least a few classes that would benefit from being immutable. In this month's Java theory and practice, Brian Goetz explains some of the benefits of immutability and some guidelines for constructing immutable classes. Share your thoughts on this article with the author and other readers in the accompanying discussion forum. (You can also click Discuss at the top or bottom of the article to access the forum.)
An immutable object is one whose externally visible state cannot change after it is instantiated. The String, Integer, and BigDecimal classes in the Java class library are examples of immutable objects -- they represent a single value that cannot change over the lifetime of the object.
Benefits of immutability
Immutable classes, when used properly, can greatly simplify programming. They can only be in one state, so as long as they are properly constructed, they can never get into an inconsistent state. You can freely share and cache references to immutable objects without having to copy or clone them; you can cache their fields or the results of their methods without worrying about the values becoming stale or inconsistent with the rest of the object's state. Immutable classes generally make the best map keys. And they are inherently thread-safe, so you don't have to synchronize access to them across threads.
Freedom to cache
Because there is no danger of immutable objects changing their value, you can freely cache references to them and be confident that the reference will refer to the same value later. Similarly, because their properties cannot change, you can cache their fields and the results of their methods.
If an object is mutable, you have to exercise some care when storing a reference to it. Consider the code in Listing 1, which queues two tasks for execution by a scheduler. The intent is that the first task would start now and the second task would start in one day.
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