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pdf在线预览，动态查看，以文件流的形式查看(pdf Online preview, dynamic view, view in the form of file stream)

面向对象程序设计-Java第三次实验源代码(The third experiment of java source code)

java 编写的一个控制LED显示屏的工具(java control what appear on led.)

可二次开发的mySQL+jsp网上购物系统

搭建springboot服务器,集成mybatis 手写demo(Build Springboot server and integrate mybatis handwritten demo)

分段直线拟合，将一组点 分段拟合计算出最小权值和画出线条(Piecewise linear fitting, fitting a set of points to calculate the minimum weight sub-values ​ ​ and draw lines )

ssnmp4j是使用Java进行SNMP编程的包，此文件包含使用snmp4j的代码示例.(Snmp4j is a package for SNMP programming using Java. This file contains code examples using snmp4j.)

说明：  医院药品管理范例，基于消息监听框架 使用swing框架开发web后台服务(Hospital medicines management paradigm, based on the information to monitor the use of swing framework for the development of the framework of web services background)

本程序通过java画线，并实现线的闪动效果(java draw lines and flashing effects to achieve)

ipdatabase 二叉树快速搜索IP地址数据库 数据 数据源采用2015年广告协会制定的IP地址标准数据库，中国互联网广告行业统一采用的标准IP库。 原理 利用二叉树实现IP查询，首先将10进制IPV4地址转化为二进制构建二叉树，利用二叉树搜索进行搜索，查询时间复杂度log2n，比传统IP库n的查询速度高出一个量级。(Ipdatabase Binary Tree Fast Search IP Address Database data The data source is the standard IP address database formulated by the Advertising Association in 2015, and the standard IP database adopted by the Internet advertising industry in China. principle The binary tree is used to realize IP query. Firstly, the 10-bit IPV4 address is converted into binary to construct a binary tree, and the binary tree search is used to search. The query time complexity log2n is one order of magnitude higher than that of traditional IP library n.)