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简介
JavaEE在开发的时候,如果是系统内部常量,一般提倡用枚举常量类,写在单独的类中,但是经常要修改的变量,比如数据源配置,如果存在数据库中,有种浪费。...
简介
JavaEE在开发的时候,如果是系统内部常量,一般提倡用枚举常量类,写在单独的类中,但是经常要修改的变量,比如数据源配置,如果存在数据库中,有种浪费。但是存在TXT中扩展性不好,就笔者观察,一般的程序员都喜欢把经常修改的常量存在xml文件或者properties文件。
存在xml文件最大的好处是扩展性很好,一般用sax或者dom这两个方向的框架,比如DOM4J,JDOM等。Sun推出的JAXM(Java API for XML Messaging)也是用的DOM4J。由于SAX的处理方式类似流媒体,是逐行的,不需要全部加载。而DOM是全部加载在内存,生成树。因而SAX的读取比DOM性能好,但是修改的话DOM略胜一筹。properties文件的扩展性不如xml,但是有很多xml没法实现的优势,比如加密之类的~
Helloworld
笔者根据自己开发中感受,写了一个工具包,用来体现读取xml或者properties的流程,大家在使用的时候记得修改文件路径。一共包含五个文件.本demo主要是用来模拟读取数据库的账户和密码的,读者可以在此基础上扩展。-Brief introduction
JavaEE development at the time, if the system constants are generally used to promote constant enumeration type, write in a separate category, but often want to modify the variables, such as the data source configuration, if the database exist, in one waste. But the existence of bad TXT extension on my observation, the programmers in general are often modified to enjoy the constant existence xml documents or document properties.
Xml files exist to expand the biggest benef
- 2022-06-01 17:25:12下载
- 积分:1
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一个龟兔赛跑的多线程源码
一个龟兔赛跑的多线程源码-a race between the multi-threaded FOSS
- 2022-02-06 14:10:55下载
- 积分:1
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首先,你应该确保你的jdk1.4是有效的,所有需要的类…
At first you should be sure that your JDK1.4 is valid and all needed
classes are in CLASSPATH. If you don t know how to set CLASSPATH, later
a section will tell you.
After unziped calendar.zip, there is a directory named fancy. Please
keep the directory and move it into a path which is in your CLASSPATH.
If you are under linux, you can change directory to fancy and type
make to compile it. It s like below command:
cd fancy
make
Or you are under Windows. you can change directory to fancy and use
command javac to compile it. It s like below command:
cd fancy
javac MyCalendar.java
After finished compiling, you can get below classes:
MyCalendar$1.class
MyCalendar$2.class
MyCalendar$3.class
MyCalendar$4.class
MyCalendar$CalendarTable.class
MyCalendar.cla-At first you should be sure that your JDK1.4 is valid and all needed classes are in the CLASSPATH . If you do not know how to set CLASSPATH. later a section will tell you. After unz
- 2023-07-26 01:10:03下载
- 积分:1
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Airline Reservation code & is very nice check it
Airline Reservation code & is very nice check it
- 2022-03-07 13:36:05下载
- 积分:1
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可以显示多个时间!见面友好!程序易懂好看!
可以显示多个时间!见面友好!程序易懂好看!-Can show multiple time! Meet friendly! Program pretty easy to understand!
- 2022-03-01 10:57:34下载
- 积分:1
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《jsp时尚编程百例》的配套光盘中100个实例
初学者学习时可以参考。...
《jsp时尚编程百例》的配套光盘中100个实例
初学者学习时可以参考。
- 2022-03-07 21:27:53下载
- 积分:1
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张孝祥的javascript的源代码,要是买哪本书的人,可以下载来看。...
张孝祥的javascript的源代码,要是买哪本书的人,可以下载来看。-Zhang Xiaoxiang the javascript source code, which book to buy if the person, you can download view.
- 2022-02-12 18:03:20下载
- 积分:1
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Java基础教程
Java基础教程-Java-based Directory
- 2023-04-14 20:50:03下载
- 积分:1
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俄罗斯方块,java 编写,完全自己写的,对集合的应用画图等等。算法不错。不过网络功能暂时没有实现,实现中。。。。。 不好意思,这个文件上次就传了。可是当时传错...
俄罗斯方块,java 编写,完全自己写的,对集合的应用画图等等。算法不错。不过网络功能暂时没有实现,实现中。。。。。 不好意思,这个文件上次就传了。可是当时传错了。。现在补救一下,希望来得及。。。站长可以不给我加下载数。。。。。。对不起。。。呵呵。-Russia squares java prepared completely on my own writing, the right set of drawing and so on. Good algorithm. But there is no network to achieve functional, and implement. . . . . Sorry, this document- the last time. But at that time-wrong. . Now what remedies, hoping time. . . Head can not have it downloaded to a few. . . . . . Sorry. . . Ha ha.
- 2022-03-18 15:50:43下载
- 积分:1
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一个简单的HTML浏览器
一个简单的HTML浏览器-a simple HTML browser
- 2023-06-18 03:35:03下载
- 积分:1