conversionService注入过程
一、org.springframework.context.support.AbstractApplicationContext
- refresh→finishBeanFactoryInitialization→setConversionService
二、org.springframework.beans.factory.support.AbstractBeanFactory
- getConversionService→initBeanWrapper→
三、org.springframework.beans.PropertyEditorRegistrySupport
- 成员：conversionService/defaultEditors/customEditors
- setConversionService→
四、org.springframework.beans.TypeConverterSupport
- typeConverterDelegate→代理→convertIfNecessary
五、org.springframework.beans.SimpleTypeConverter
- 完成typeConverterDelegate成员初始化
六、org.springframework.beans.TypeConverterDelegate
- 数据字段：private final PropertyEditorRegistrySupport propertyEditorRegistry;
- convertIfNecessary→进行类型转换系统会调用底层的conversionService.convert或调用doConvertValue传递PropertyEditor来实现