1、Servlet的继承关系假如现有我们自定义的一个Servlet，继承HttpServlet，那么实际上它的继承链如下图：!(https://oscimg.oschina.net/oscnet/19b30d211c1aa06ff2eac0334985c091886.png)可以看到，核心的部分在于：

点击上方蓝色“java大数据修炼之道”, 选择“设为星标”每晚九点:技术干货👉必定奉上!(https://oscimg.oschina.net/oscnet/61f41e19c0464b9a8377d42d7552da41.png)!(https://oscimg.oschina.net/oscnet/f7a7c5e17f92

项目结构!(https://oscimg.oschina.net/oscnet/f50d20d20bc5327724ed2fcc900b2dae709.jpg)由于想把mybatis的mapper文件和dao层放到一起所以在pom中添加了!(https://oscimg.oschina.net/oscnet/ce0d806ea7

1\.从注解入手找到对应核心类最近工作中我都是基于注解实现AOP功能，常用的开启AOP的注解是@EnableAspectJAutoProxy，我们就从它入手。!(https://oscimg.oschina.net/oscnet/3307f3a08df1251f4b119de8e02f9a92c10.jpg)

1\.官网下载http://www.graphviz.org/!(https://oscimg.oschina.net/oscnet/09c07d90ac0596be3d95ca212fd492b8fc3.png)往下拉，选择这一个!(https://oscimg.oschina.net/oscnet/0f3ae5891444015

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有同事反馈Jenkins任务构建失败登陆Jenkins，查看构建日志，报错截图如下：!(https://oscimg.oschina.net/oscnet/upc83410a125f7bc739837b7e363fdaf155bb.png)在maven私服Nexus界面搜索，也搜索不到相关组件，Central仓库的索引中也找

java.util.concurrent.atomic一个小型工具包，支持单个变量上的无锁线程安全编程.包含的类:!(https://oscimg.oschina.net/oscnet/8f3ab6f1c9d0301b0422db204ec0abd4187.png)这些类的相关操作都是

!(https://oscimg.oschina.net/oscnet/25fabc15d1194ed4bc5168240b183c9a.jpg)01.史上最牛逼的数据库公司，Oracle裁员了。!(https://oscimg.oschina.net/oscnet/5bb75d1d12ad4d879a8e4de

!(https://oscimg.oschina.net/oscnet/8b4ac067f8cb4324a4a695c26f555abe.gif)!(https://oscimg.oschina.net/oscnet/c49d32931e9d4a74925f4a5e3c631232.jpg)转载本文需注明出处：微信公众号E