如何在 Java 中执行字符串差异? [英] How to perform string Diffs in Java?

问题描述

我需要在 Java 字符串之间执行差异.我希望能够使用原始字符串和差异版本重建字符串.有没有人用Java做过这个?你使用什么库?

I need to perform Diffs between Java strings. I would like to be able to rebuild a string using the original string and diff versions. Has anyone done this in Java? What library do you use?

String a1; // This can be a long text
String a2; // ej. above text with spelling corrections
String a3; // ej. above text with spelling corrections and an additional sentence

Diff diff = new Diff();
String differences_a1_a2 = Diff.getDifferences(a,changed_a);
String differences_a2_a3 = Diff.getDifferences(a,changed_a);    
String[] diffs = new String[]{a,differences_a1_a2,differences_a2_a3};
String new_a3 = Diff.build(diffs);
a3.equals(new_a3); // this is true

推荐答案

这个库似乎可以解决问题:google-diff-match-patch.它可以根据差异创建补丁字符串并允许重新应用补丁.

This library seems to do the trick: google-diff-match-patch. It can create a patch string from differences and allow to reapply the patch.

edit:另一种解决方案可能是 https://code.google.com/p/java-diff-utils/

edit: Another solution might be to https://code.google.com/p/java-diff-utils/

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