IOC https://blog.csdn.net/xiaoyixiao_/article/details/116835572
AOP https://blog.csdn.net/xiaoyixiao_/article/details/116851579
JdbcTemplate https://blog.csdn.net/xiaoyixiao_/article/details/116854819
事务 https://blog.csdn.net/xiaoyixiao_/article/details/116863818
