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java手机程序开发光盘源码(第五章)
java手机程序开发光盘源码(第五章)-CD-source development process (Chapter V)
- 2022-06-13 06:51:02下载
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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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javajdk宝典的所有源代码版本的开发实例…
javajdk实例开发宝典全部源代码夏先波第二版-Baodian javajdk examples of the development of all the source code version of the summer before the second wave
- 2022-01-25 16:43:19下载
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GOOD PROJECT ABOUT ATM DATABASE SYSTEM WITH DATABASE IN MS ACCESS
GOOD PROJECT ABOUT ATM DATABASE SYSTEM WITH DATABASE IN MS ACCE-GOOD PROJECT ABOUT ATM DATABASE SYSTEM WITH DATABASE IN MS ACCESS
- 2022-05-24 13:30:49下载
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Struts经典源码,学习Struts必经之路,走过看过不要错过
Struts经典源码,学习Struts必经之路,走过看过不要错过-Struts classical source, the only way to learn Struts, come read Do not miss
- 2023-01-13 17:50:04下载
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SSD3的Exercise 7的答案,编写日期:2009.12.20
SSD3的Exercise 7的答案,编写日期:2009.12.20-the answer of exercise 7
- 2022-03-23 09:31:15下载
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本程序包适用于客户端是WINDOWS操作平台,WEB SERVER可以为TOMCAT/WEBLOGIC等使用。能进行远程扫描,图像能保存进DB中。...
本程序包适用于客户端是WINDOWS操作平台,WEB SERVER可以为TOMCAT/WEBLOGIC等使用。能进行远程扫描,图像能保存进DB中。-This package applies to the client is a WINDOWS platform, WEB SERVER for TOMCAT/WEBLOGIC such use. Able for remote scanning, images can be save into the DB in.
- 2022-08-25 06:48:01下载
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This a JavaBean application, which contains 4 beans. In this package, there are...
This a JavaBean application, which contains 4 beans. In this package, there are 4 files:
cexchange.jar(ready to load into BeanBuilder),
readme.txt,
currencyData.txt(data file),
screenshot.jpg(linking beans)-This a JavaBean application, which contains four beans. In this package, there are four files : cexchange.jar (ready to load into BeanBuilder ), readme.txt, currencyData.txt (data file). Screenshot (linking beans)
- 2023-07-04 07:55:03下载
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源代码是java,很好的
源代码是java,很好的-java source code is a good
- 2022-05-14 07:49:37下载
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java做的文件编辑器
java做的文件编辑器-do file editor
- 2022-03-12 18:12:50下载
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