Advantages of spring framework in Java framework

Why should we learn the Spring framework
a: Convenient decoupling and simplified development
Spring is a big factory that can hand over all object creation and dependency maintenance to Spring management
b: Support for AOP programming
Spring provides aspect-oriented programming, which can easily implement functions such as permission interception and operation monitoring of programs
c: Support for declarative transactions
Only needs to be configured Complete transaction management without manual programming
d: Convenient for program testing
Spring supports Junit4, and Spring programs can be easily tested through annotations
e: Convenient for integrating various excellent frameworks
Spring It does not exclude various excellent open source frameworks. It provides direct support for various excellent frameworks (such as: Struts2, Hibernate, MyBatis, Quartz, etc.)
f: Reduce the difficulty of using JavaEE API
　 Spring for JavaEE Some APIs that are very difficult to use in development (JDBC, JavaMail, remote calls, etc.) are encapsulated, which greatly reduces the difficulty of applying these APIs

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