摘要：数据结构： 表中一字段存储经度和纬度： + + | INSTALL_LOLA_NUM | + + | 23.0345735213,69.01224234 | | 23.0340313,69.01224234 | | 93.03453,69.01224234 | | 10.23683,69.01224 阅读全文

摘要：一、等待与唤醒 /** * 线程通讯问题 * Object wait, notify, notifyAll * Condition await signal signAll * CountDownLatch 当前线程等待若干个其他线程执行完成之后再执行 * CyclicBarrier 一组线程等待某 阅读全文

摘要：学习参考： https://www.bilibili.com/video/BV1ut411T7Yg 一、线程创建的四种方式： 1、集成线程类 /** * 使用匿名内部类实现子线程类，重写Run方法 */ static class CustomThread extends Thread { @Over 阅读全文

摘要：参考： https://blog.csdn.net/weixin_40716682/article/details/90064473 默认是有边框线的 删除边框线，设置高度和背景色即可 background-color: rgb(220,223,230); height: 2px; border: 阅读全文

摘要：统一修改字段成小写+下划线的命名规则： V1上线后，重新看SQL调整的较可行的写法： # = = = = = = = = = = = = = = = 统一更改全库所有字段大小写脚本SQL(会删除字段原来的字符集和排序规则) = = = = = = = = = = = = = = = = = = = 阅读全文