图书管理系统 booksystem

实现添加日志功能，用户能够保存自己怕忘记的事(Implementing the function of adding logs, users can save things they are afraid of forgetting.)

说明：  办公查询系统实现员工信息查询，部门查询，职位查询等信息(Office inquiry system realizes staff information inquiry, Department inquiry, position inquiry and other information.)

JAVA图形界面swing的知识点。全面简练。适合初学者(JAVA swing GUI knowledge points. Comprehensive and concise. Suitable for beginners)

电费管理系统比较社和初学者！对实际应用，帮助比较大！(Electricity management system is relatively clubs and beginners! For practical applications, to help big!)

GEF 使用、原理、功能、框架介绍，初学者必备书籍(GEF use, principles, functions, frameworks introduced)

医院管理系统hospital management system(hospital management system)

MQL4命令中文手册，帮助学会如何使用MQL4(MQL4 command Chinese manual to help learn how to use MQL4)

ssh框架实现增删改查以及购物车的实现和分页功能(SSH framework implementation questions and increase the realization of the shopping cart check and paging function)

modul mysql, tutorial my sql. how to make connection with mysql.

说明：  1. 能够实现根据以下关键字查询：学生姓名 、学号、班级、课程名称。 2. 能够实现按照单科成绩、总成绩、平均成绩、学号排序。 3. 能够实现学生信息的插入、删除和修改。 4. 能够查询每个课程的最高分、最低分及相应学生姓名、班级和学号。 5. 能够查询每个班级某门课程的优秀率(90 分及以上)、不及格率，并进行排序。(1. Be able to query according to the following keywords: student name, student number, class, course name. 2. It can be sorted according to single subject score, total score, average score and student number. 3. Be able to insert, delete and modify student information. 4. Be able to query the highest score and lowest score of each course and the corresponding student name, class and student number. 5. Be able to query the excellent rate (90 points and above) and failure rate of a course in each class, and sort them.)