比如
public @interface RequestMapping {
String name() default "";
.
.
.
}
@RequestMapping(name="xxx",value="xxx")可以理解但是@RequestMapping("/")则不理解到底给谁赋值了，是默认第一个？
默认是给名为"value"的属性赋值。
https://docs.oracle.com/javase/tutorial/java/annotations/basics.html
If there is just one element named value, then the name can be omitted.