导入代码前需要执行./gradlew cglibRepackJar和./gradlew objenesisRepackJar,从最简单的context.start()开始
ClassPathXmlApplicationContext context = new
ClassPathXmlApplicationContext("classpath:application.xml");
context.start();
1.ClassPathXmlApplicationContext类继承关系
2.ClassPathXmlApplicationContext主要方法