Spring源码分析-IOC之TypeConverter

TypeConverter:定义类型转换方法的接口。通常(但不一定)与PropertyEditorRegistry接口一起实现 , 通常接口TypeConverter的实现是基于非线程安全的PropertyEditors类,因此也不是线程安全的,我们来看下具体的API:

public interface TypeConverter {

	  //将value转化为requiredType类型,如果将String转化为任何类型的话用PropertyEditor的setAsText或者ConversionService中的Spring Converter
	<T> T convertIfNecessary(Object value, Class<T> requiredType) throws TypeMismatchException;

	//作用与上面一样,增加了转换目标的方法参数(the method parameter that is the target of the conversion)
	<T> T convertIfNecessary(Object value, Class<T> requiredType, MethodParameter methodParam)
			throws TypeMismatchException;

	//作用与上面一样,增加了转换目标的反射field(the reflective field that is the target of the conversion)
	<T> T convertIfNecessary(Object value, Class<T> requiredType, Field field)
			throws TypeMismatchException;

}

TypeConverter只是一个接口,具体的在Spring的实现与应用我们将在后面继续介绍.

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转载自blog.csdn.net/cgsyck/article/details/88902174