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Java教程，21天精通JAVA电子书，清晰版。(Java Tutorial, 21 days proficient JAVA books, clear version.)

java实现语法分析树，并进行优化分析树，源自哈尔滨工业大学数据库实验6，(parser tree for SQL by java)

paypal 的源代码 欢迎下载使用 (paypal source code)

说明：  program source code for a lifestyle program

java书籍ppt 里面有很多教程 值得参考使用(There are many tutorials in Java books worth referring to.)

JAVA编程，基于C/S模式的局域网络聊天程序，适用于学生的课程设计(JAVA programming, based on the C/S mode local area network chat program for students in curriculum design)

最好的PHP购物车,我也是从别人那得到的(The best PHP shopping cart, I got it from someone else.)

　　　采用JAVA作为开发工具，mysql作为后台数据库。本系统具有学生基本信息管理、学生成绩信息管理、教师基本信息管理等功能。分成三大模块，每个模块都相互联系，但不相互干扰，这符合了软件模块开发的思想。 本系统完成了学生信息的查询、修改、增加、删除；教师信息的查询、修改、增加、删除以及学生成绩信息的查询、修改、增加、删除等功能。(Using JAVA as a development tool, mysql database as a background. This system has the students basic information management, information management student achievement, teachers basic information management and other functions. Divided into three modules, each linked to every other, but do not interfere with each other, in line with the idea of ​ ​ a software module development. The system completed the student information query, modify, add, delete teacher information query, modify, add, delete, and student achievement information, query, modify, add, delete functions.)

shiro基础资料，包含简单的基本内容，供大家学习使用(shiro learning data for boay)

1 取字符串所有汉字首字母 2 取汉字字符串的首字母(A string of all the characters take the first letter of two characters to take the first letter of a string)