java - org.apache.commons.text.diff 的用途是什么？

Question

我阅读了org.apache.commons.text.diff的文档。但我仍然不明白类 InsertCommand、EditCommand、KeepCommand 和 DeleteCommand 可以用来做什么。有人知道它们的全部内容以及如何使用它们吗？

Answer 1

如果比较两个字符串:

A B C E F H (旧)
A C D E G H (新)

那么你的“脚本”是:

Keep   'A'
Delete 'B'
Keep   'C'
Insert 'D'
Keep   'E'
Delete 'F'
Insert 'G'
Keep   'H'

如 EditCommand 的 javadoc 中所述:

When two objects sequences are compared through the StringsComparator.getScript method, the result is provided has a script containing the commands that progressively transform the first sequence into the second one.