ClassPathXmlApplicationContext constructor, part of the logic is to each member variable initial value:
The refresh operation is then performed.
Get ConfigurableListableBeanFactory:
Beans from beans.xml, once parsed, are stored in BeanFactory member variables beanDefinitionMap.
So how is the bean definition in beans.xml parsed?
Into abstractApplicationContext look:
LoadBeanDefintions method:
Enter AbstractXmlApplicationContext loadBeanDefinitions method:
From the Beans. Read and parse the XML place bean definition: a reader. LoadBeanDefinitions (configLocations);
Recursive method is called AbstractBeanDefinitionReader loadBeanDefinitions:
We recursively call loadBeanDefinitions, which receives input parameters of type Resource:
Entered the XmlBeanDefinitionReader. LoadBeanDefinitions method:
To start IO operations on beans.xml:
Pass the inputSource returned by Java IO operations into doLoadDocument:
Parse Beans.xml using documentBuilder:
CountBefore is 0, and registerBeanDefinitions is performed:
In the registerBeanDefintions method, parsing is done through the XML API provided by org.w3c.dom.element:
Parsing is divided into preProcess, parseBeanDefinitions, and postProcess:
To enter the IF branch, a bean node is found in beans.xml:
This is what the beanDefinition looks like:
Beans in beans.xml are defined as follows:
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