Calculator-master

说明：  NetBeans8.2连接mysql数据库测试文档(NetBeans 8.2 Connect Mysql Database Test Document)

处理咖啡店的订单，核对账单，以及库存管理(Processing coffee shop orders, check invoices, and inventory management)

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.)

说明：  控制条件语句的变量，在for循环结束后，就不可以被访问了，而while循环还可以访问，如果你继续想使用该变量，则可以使用while循环，否则推荐使用for循环，原因是for循环结束，该变量就从内存中消失，能够提高内存的使用效率。(The variable that controls the conditional statement is not accessible after the for loop has finished, and the while loop is accessible if you continue to use the variable, you can use the while loop. Otherwise, it is recommended to use the for loop, because the variable disappears from memory after the for loop, which can improve memory efficiency.)

GB28181-2011T 安全防范视频监控联网系统信息传输、交换、控制技术要求(GB SAFE VIDEO)

说明：  用Java实现云计算任务调度功能，并在cloudsim上仿真(Use Java to implement cloud computing task scheduling function and simulate on cloudsim)

使用Java蓝牙无线通讯技术API概述之二(The use of Java Bluetooth wireless communication technology of the two API Overview)

说明：  《Java课程设计》随书源码，很全，所有章节的源码都有(The source code of "Java Curriculum Design" is included with the book.)

说明：  仓库管理系统主要包括以下功能。 1. 仓库管理：主要实现对仓库进货、出货、商品调拨和商品图片信息进行管理 2. 商品查询：主要实现查询商品的库存情况，对商品的调拨、进货、出货、缺货情况和商评的图片信息做出记录 3. 系统设置：系统设置实现供应商信息、仓库信息和账号信息的添加、删除和修改。(The warehouse management system mainly includes the following functions. 1. Warehouse management: mainly realizes the management of warehouse purchase, delivery, commodity allocation and commodity picture information. 2. Commodity inquiry: Mainly to inquire about the inventory of commodities, and record the allocation, purchase, delivery, stock out and the picture information of the evaluation of commodities. 3. System settings: System settings can add, delete and modify supplier information, warehouse information and account information.)

java框架技术struts2的简单例子，用于入门(struts2 java framework technology simple example, for entry)