Spring AnnotationFormatterFactory详解

public interface AnnotationFormatterFactory<A extends Annotation> {
    /**
     * The types of fields that may be annotated with the &lt;A&gt; annotation.
     * 字段类型
     */
    Set<Class<?>> getFieldTypes();
    /**
     * Get the Printer to print the value of a field of {@code fieldType} annotated with
     * {@code annotation}.
     * <p>If the type T the printer accepts is not assignable to {@code fieldType}, a
     * coercion from {@code fieldType} to T will be attempted before the Printer is invoked.
     * 通过注解和字段类型获取输出接口
     * @param annotation the annotation instance
     * @param fieldType the type of field that was annotated
     * @return the printer
     */
    Printer<?> getPrinter(A annotation, Class<?> fieldType);
    /**
     * Get the Parser to parse a submitted value for a field of {@code fieldType}
     * annotated with {@code annotation}.
     * <p>If the object the parser returns is not assignable to {@code fieldType},
     * a coercion to {@code fieldType} will be attempted before the field is set.
     * 通过注解和字段类型获取解析接口
     * @param annotation the annotation instance
     * @param fieldType the type of field that was annotated
     * @return the parser
     */
    Parser<?> getParser(A annotation, Class<?> fieldType);
}