一、开发服务端1、新建工程 cfxwebservice，最终的完整工程如下：!(https://oscimg.oschina.net/oscnet/b5d450fe5b7b86ff0f4fcb1dc9efe08854b.png)pom.xml如下：<?xmlversion"1.0"encoding"UTF8"

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Android常见传感器!(https://oscimg.oschina.net/oscnet/58b38f6e9ab034d455573188a3b61d29f8c.jpg)最终我们要实现这些：!(https://oscimg.oschina.net/oscnet/1a75d6e3e4c34042970988

点击上方“民工哥技术之路”，选择“设为星标”回复“1024”获取独家整理的学习资料！!(https://oscimg.oschina.net/oscnet/5cc8ef8e99d84510ba7abce9d47c57ff.jpg)(https://www.oschina.net/action/GoToLink?urlhttps%3A

延迟加载：“懒汉模式”延迟加载是指在调用getInstance()方法时创建实例。常见的方法是在getInstance()方法中实例化new。实现代码如下：!(https://oscimg.oschina.net/oscnet/0b194956e9fd68db32050dd6439225bb86a.png)但是因为ge

!(https://oscimg.oschina.net/oscnet/6051a14c146a48ff9c86e7d573caae12.png)：你填了吗？(https://www.oschina.net/action/GoToLink?urlhttps%3A%2F%2Fmp.weixin.qq.com%2Fs%3F__biz%3DMzI

!(https://oscimg.oschina.net/oscnet/9de3ec3134254257807e912fab034223.jpg)节前某个部门的测试环境反馈tomcat会意外退出，我们到实际环境排查后发现不是jvmcrash，日志里有进程销毁的记录，从pause到destory的整个过程：org.apac

一、Redis集群：　　集群解决并发的问题；　　哨兵解决高可用的问题； !(https://oscimg.oschina.net/oscnet/a3d3506dc6dcb9cbe01ee2c6a83925c98a0.png)二、集群搭建：　　//基于redis5.0； 　　1）启动三台Linux系统，且用docke

•查看设置的最大与最小内存：!(https://oscimg.oschina.net/oscnet/21e004570bb0114b62531b9d6ecaae8c92e.jpg)!(https://oscimg.oschina.net/oscnet/d53a81b041283ece7c5da6b827457417e64.jpg)

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