spring学习笔记数据库的相关内容

文章 2022-02-15 来自：开发者社区

spring学习笔记(20)数据库事务并发与锁详解

多事务运行并发问题在实际应用中，往往是一台（或多台）服务器向无数客户程序提供服务，当服务器查询数据库获取数据时，如果没有采用必要的隔离机制，可能会存在数据库事务的并发问题，下面是一些常见的并发问题分类： 1. 第一类丢失更新：撤销一个事务，其他事务已提交的更新数据覆盖 2. 第二类丢失更新：一个事务覆盖另一个事务已提交的更新数据 3. 脏读：一个事务读到另一个事务未提交的数据 4. 虚读：...

文章 2022-02-15 来自：开发者社区

spring学习笔记(17)数据库配置[1]spring数据连接池详解

数据连接池在spring中，常使用数据库连接池来完成对数据库的连接配置，类似于线程池的定义，数据库连接池就是维护有一定数量数据库连接的一个缓冲池，一方面，能够即取即用，免去初始化的时间，另一方面，用完的数据连接会归还到连接池中，这样就免去了不必要的连接创建、销毁工作，提升了性能。当然，使用连接池，有一下几点是连接池配置所考虑到的，也属于配置连接池的优点，而这些也会我们后面的实例配置中体现： .....

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满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。

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