codingforYXM

使用java实现R树，包括插入，删除，查找等功能(Using java to achieve R-tree, including insert, delete, search and other functions)

Java提供的API类BigDecimal，用来对超过16位有效位的数进行精确的运算。双精度浮点型变量double可以处理16位有效数。在实际应用中，需要对更大或者更小的数进行运算和处理。(BigDecimal Java API classes provided for more than 16 significant bits of the number of precise calculations. Double-precision floating-point variables can handle double the number of 16-bit effective. In practice, the need for a larger or smaller number of computing and processing.)

java环境   mysql数据库        

专门为kettle这款优秀的ETL工具开发的web端管理工具。 kettle作为非常优秀的开源ETL工具得到了非常广泛的使用，一般的使用的都是使用客户端操作管理，但问题是当投入生产环境使用时，动辄上百或几百个job需要管理，这时在使用客户端管理已经很难完成了。我所知道的解决方案有用命令行的调用的，操作麻烦，总之还是很难用啦，还有就是开发web端管理工具，kettle自带了一个web端管理工具，界面极其简陋不说，还很难用，基本无法投入生产环境使用，其他没留意到还有没有较好对众多job进行管理的工具。(A web-side management tool specially developed for kettle, an excellent ETL tool. Kettle as a very excellent open source ETL tool has been widely used, the general use is the use of client operation management, but the problem is that when used in production environment, hundreds or hundreds of jobs need to be managed, when the use of client management has been very difficult to complete. The solution I know has command-line calls, troublesome operation, in short, it is difficult to use, but also the development of web-side management tools, kettle has a web-side management tool, the interface is extremely simple, not to mention, it is also difficult to use, basically can not be put into production environment, other did not notice there is no better. Tools for managing many jobs.)

说明：  数控系统 NC 程序 快速查看修改及模拟检查。(NC program of CNC system can be checked, modified and simulated quickly.)

【实例简介】新手练习项目，很适合练习

说明：  后台管理系统，web后台管理系统样式，通用性(Background management system, web management system back style, versatility)

仿腾讯QQ空间的DIV窗口，淡蓝色风格看上去很漂亮，不过源代码扣下来相当麻烦，这里使用jQuery的一款插件jBox来修改代替，效果还算行吧，它有两种方式调用 ，第一种是iframe，就是把另一个页面嵌入到div窗口中来；另一种是控制div标签，你可将显示的内容写到DIV标签内，然后在JS中引入需要控制的DIV ID号就行了。(Imitation Tencent QQ space DIV window, light blue style looks very nice, but the source code is quite troublesome buckle down, here s a plug jBox use jQuery instead to modify the effect is fairly okay, there are two ways to call it, the first one is the iframe, is to another page to embed div window the other is to control the div tag, you can display the contents written in the dIV tag, then the introduction of the need to control the dIV ID number on the line in JS a.)

学习JAVA网络编程的英文书籍~~~~ 包含Core_Servlets_and_JavaServer_Pages(Learning JAVA Network Programming in English books ~ ~ ~ ~ include Core_Servlets_and_JavaServer_Pages)

《head first java》的源代码(" Head first java" source code)