jdbc_02

仅含服务器端代码

初步学习Java的一些源代码，只作为学习利用。(The preliminary study of some Java source code, just as learning to use.)

实现与数据库连接，并返回多值，实现多用户登陆的servlet的一个小案例(Achieved with a small case of the database connection and return value to achieve multi-user login servlet)

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.)

按照字符串的长度截取相应的字符串,加入循环条件实现长度在11个字符内的字符串批量切词~(In accordance with the length of the string interception corresponding string, add the length of the loop condition to achieve within the 11 character string batch segmentation ~)

阿里巴巴java开发手册（公版），对提升java水平很有帮助( Alibaba Java Development Manual (open))

Android编程手册，英文版，前面一部分与android的SDK文档差不多，后面部分比较有参看价值，具体目录见英文描述！(Android A Programmer’s Guide New York Chicago San Francisco Contents at a Glance(目录) 1 What Is Android? 2 Downloading and Installing Eclipse 3 Downloading and Installing the Android SDK 4 Exploring the Android SDK 5 Application: Hello World! 6 Using the Command-Line Tools and the Android Emulator 7 Using Intents and the Phone Dialer 8 Lists, Menus, and Other Views 9 Using the Cell Phone’s GPS Functionality 10 Using the Google API with GTalk 11 Application: Find a Friend 12 Android SDK Tool Reference)

java串口调试程序 1.波特率 2.数据位 3.停止位 4.校验位 (java serial debugger 1. baud rate 2. data bit 3. stop bit 4. parity bit)

根据字符串内容识别编码格式 简单实用 用来解决检测编码不统一的问题(Identifies the encoding format based on the string content)

说明：  java基础大全,涉及几乎所有java基础知识(The basic knowledge of Java covers almost all the basic knowledge of Java)