1. 源码解析之ApplicationContext

主入口：ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-config.xml");

1.1. ClassPathXmlApplicationContext

ClassPathXmlApplicationContext

public ClassPathXmlApplicationContext(
            String[] configLocations, boolean refresh, @Nullable ApplicationContext parent)
            throws BeansException {

        super(parent);
        //设置配置文件路径
        setConfigLocations(configLocations);
        //刷新环境
        if (refresh) {
            refresh();
        }
    }

setConfigLocations

public void setConfigLocations(@Nullable String... locations) {
        if (locations != null) {
            Assert.noNullElements(locations, "Config locations must not be null");
            this.configLocations = new String[locations.length];
            for (int i = 0; i < locations.length; i++) {
                //解析配置文件路径中的图书负号（如${}）并设置配置文件路径
                this.configLocations[i] = resolvePath(locations[i]).trim();
            }
        }
        else {
            this.configLocations = null;
        }
    }

刷新环境方法refresh