Chart1

springcloud基本功能，一些简单的查询操作，删除操作，插入操作，定时任务配置(Spring cloud basic functions, some simple query operations, delete operations, insert operations, timing task configuration)

说明：  基于差分进化与粒子群混合算法优化源程序,这是一个java语言编制的源程序,很实用.(Based on Differential Evolution and Particle Swarm Optimization Hybrid Algorithm source code, which is a java source languages, it is practical.)

this is answer for ssd7 exercise 4

可以在web开发中用es集群缓存数据，替代数据库，提高效率(You can use elasticsearch)

Email protocols on the internet Post Office Protocol version 3 (POP3) is a standard mail protocol used to receive emails a remote server to a local email client.- POP3

说明：  hotel source code can try ng liang shen

java 实现的基础数据结构栈和队列，仅供有需要的同学参考(java code of stack and queue )

点对点聊天，很不错的，又称图形界面下的点对点通信程序(peer-to-peer chatting, very good, also known as the graphical interface of peer-to-peer communication program)

JAVA实现的TFTP，类似与FTP的功能，有服务器、客户端，可以实现文件上传到服务器。(JAVA implementation of TFTP, and FTP similar functions, have the server, the client, you can achieve a file upload to the server.)

It help you to find the center of an ellipse