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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
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this is time table generation project
this time table generation project-this is time table generation project
- 2023-03-28 08:10:03下载
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冒泡算法
冒泡算法-请修改MaoPao.zip为MaoPao.java-Bubble algorithm-requested changes to MaoPao.java MaoPao.zip
- 2022-01-22 07:48:04下载
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XiorkFlow project design, implementation based on Browser/Server structure, grap...
XiorkFlow项目设计、实现基于Browser/Server结构、图形化界面、通用的工作流定制软件，这个软件支持企业业务流程的动态重组-XiorkFlow project design, implementation based on Browser/Server structure, graphical interface, a common workflow customized software, the software supports the dynamic enterprise business process re-
- 2023-07-17 14:35:03下载
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Java虚拟机规范。java虚拟机被设计为支持java的亲…
Jvm 规范说明。The Java Virtual Machine was designed to support the Java programming language. Some concepts and vocabulary from the Java language are thus necessary to understand the virtual machine. This chapter gives enough of an overview of Java to support the discussion of the Java Virtual Machine to follow. Its material has been condensed from The Java Language Specification, by James Gosling, Bill Joy, and Guy Steele. For a complete discussion of the Java language, or for details and examples of the material in this chapter, refer to that book. Readers familiar with that book may wish to skip this chapter. Readers familiar with Java, but not with The Java Language Specification, should at least skim this chapter for the terminology it introduces.-JVM specification. The Java Virtual Machine was designed to support the Java programming language. Some concepts and vocabulary from the Java language are thus necessary to understand the virtual machine. This chapter gives enough of an overv
- 2022-05-22 11:47:41下载
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java中的神经网络
neural networks in Java
- 2022-02-25 17:29:43下载
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JAVA聊天程序，主要是用socket方法写的
JAVA聊天程序，主要是用socket方法写的
-JAVA chat program, the main method is written in socket
- 2023-05-15 10:45:03下载
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此段源码是我自己做的一个骑士飞行棋小游戏，是北大青鸟1期JAVA的一个项目...
此段源码是我自己做的一个骑士飞行棋小游戏，是北大青鸟1期JAVA的一个项目-This source is my own flight to do a Cavalier chess game is a JAVA Beida Jade Bird a project
- 2022-03-17 23:29:29下载
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这件事基于java编程，内容
这个事JAVA编程的基础，内容丰富，而且实战性强-This matter based on JAVA programming, content-rich, and strong real
- 2022-05-28 15:46:33下载
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jsp form validation code, covering a very wide form content. Regular languages t...
jsp表单验证的代码，覆盖很全的表单内容。正则语言编写，方便操作使用-jsp form validation code, covering a very wide form content. Regular languages to facilitate the operational use
- 2022-08-20 16:53:14下载
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