[3.1 IOC/DI](3.1IOC/DI.md) [3.2 Spring Aop](3.2AOP%E4%BD%BF%E7%94%A8.md) [3.3 Spring Jdbc](3.3SpringJdbc.md) [3.4 事物相关](3.4%E4%BA%8B%E7%89%A9%E7%9B%B8%E5%85%B3.md) [3.5 MBG使用](3.5mbg%E9%80%86%E5%90%91%E5%B7%A5%E7%A8%8B.md)