## 类的使用
org.springframework.util.comparator.NullSafeComparator

- 使用NullSafeComparator的程序包
  程序包 | 说明
  --- | ---
  org.springframework.util.comparator | Useful generic `java.util.Comparator` implementations, such as an invertible comparator and a compound comparator.

- - ### org.springframework.util.comparator中NullSafeComparator的使用

    声明为NullSafeComparator的org.springframework.util.comparator中的字段
    限定符和类型 | 字段和说明
    --- | ---
    `static NullSafeComparator` | NullSafeComparator.`NULLS_HIGH` A shared default instance of this comparator, treating nulls higher than non-null objects.
    `static NullSafeComparator` | NullSafeComparator.`NULLS_LOW` A shared default instance of this comparator, treating nulls lower than non-null objects.