RestTemplate并发优化

100并发解决方案：

https://blog.csdn.net/qq_34173549/article/details/83098900

参数调优：https://www.cnblogs.com/jimw/p/9037542.html

 

300并发解决方案：

https://q.cnblogs.com/q/101480/

https://gitee.com/eoolife/codes/ef4ntud39bj1aswrgoqy865

 

restTemplate实例：

https://www.cnblogs.com/tomcatandjerry/p/5899722.html

 

try catch嵌套：

https://blog.csdn.net/qq_30715329/article/details/85463461

 

nginx优化：

https://blog.csdn.net/u011277123/article/details/78869824 max_fails参数调优

 

 socket:

https://www.cnblogs.com/w-wfy/p/6415840.html

 

Nginx集群：

https://www.cnblogs.com/xiugeng/p/10155283.html#_label0_2

 

Maven Profile

1.按环境打包,profile放在4个地方，设置：web.xml+代码+注解+环境变量/操作系统参数: https://www.jianshu.com/p/16f62a8735df

https://www.cnblogs.com/strugglion/p/7091021.html

2. 支持临时改配置的包，按顺序加载，后面没有也可以。

<context:property-placeholder ignore-resource-not-found="true" location="classpath:jdbc.properties
 ,/jdbc.properties ,file:#{systemProperties['catalina.home']}/conf/appX.properties
 ,file:/usr/local/appConfig/appX.properties"/>