Java---lessons

windows这是一个随便选的文档，因为我想下一个东西，但是开会员太贵了(windows This is an optional document, because I want the next thing, but the meeting members are too expensive.)

一个由邻接矩阵直接求解可达矩阵的计算工具,JAVA语言编程()

说明：  主要是基于简化以后的大型电商详情页系统的背景，来重点讲解了三块内容：Redis集群架构、大型高并发缓存架构以及基于Hystrix的高可用服务架构，里边有视频地址。(Based on the background of the simplified large-scale e-commerce detail page system, this paper focuses on three parts: Redis Cluster Architecture, Large Concurrent Cache Architecture and Hystrix-based High Availability Service Architecture.)

幸运52的代码，这是我上课时需要用的代码 请求帮助(Lucky 52 code. This is the code request help I need in class)

设计一个简单的课程管理系统（CourseManager）。主要功能包括： 课程信息的录入。主要包括：课程号（no）、课程名（name）、学分（grade）等； 课程信息的查询。根据课程号、课程名和学分等查询课程的信息。注意：查询结果可能不唯一。 课程信息的修改。根据课程号查询到指定课程的信息，再用新的内容替换。 课程信息的删除。根据课程号删除指定课程的信息。 设计时，采用层次化设计法，将类分为界面层（ui）、功能层（business）和持久层（persistence）3层，放在不同子包中。整个系统的代码放在exe4_2包中。(Design a simple course management system (CourseManager). Key features include: Entry course information. Including: course number (no), course name (name), credits (grade) and the like Queries course information. Information based curriculum, course name and credit and other inquiries courses. Note: query results may not be unique. Modify course information. Inquiry based curriculum to the specified courses, and then replaced with new content. Remove course information. Remove a specified course of information based curriculum. Design, the use of hierarchical design method, the class is divided into the interface layer (ui), the functional layer (business) and persistence (persistence) 3 layers in different sub-packages. The system code in the exe4_2 package.)

完善的Java项目管理系统网页，自己写的(Improve the Java project management system page, write it myself)

说明：  华夏ERP基于SpringBoot框架，立志为中小企业提供开源好用的ERP软件，目前专注进销存+财务功能。主要模块有零售管理、采购管理、销售管理、仓库管理、财务管理、报表查询、基础数据、系统管理等。支持预付款、收入支出、仓库调拨、组装拆卸、礼品卡等特色功能。拥有库存状况、出入库统计等报表。同时对角色和权限进行了细致全面控制，精确到每个按钮和菜单。(Based on SpringBook framework, Huaxia ERP aims to provide open source and easy-to-use ERP software for SMEs. At present, it focuses on purchase, sale, storage and financial functions. The main modules are retail management, purchasing management, sales management, warehouse management, financial management, report query, basic data, system management, etc. Support advance payment, revenue and expenditure, warehouse allocation, assembly and disassembly, gift cards and other features. Have inventory status, entry and Exit Statistics and other reports. At the same time, roles and privileges are carefully and comprehensively controlled, precisely to each button and menu.)

this is a java programming for some functions of the cube.

学习freemark时候写的工具类，可以用在网站中，通过只初始化一次来提高性能(The learn code of freemark,which developed to a Util, can be used on the site is initialized only once to improve performance)

用java JSP实现的一个小型网站，界面简洁，功能齐全，适合入门的初学者(With java JSP to achieve a small site, simple interface, complete functions, suitable for beginners to get started)