java-diff-utils 用法

<dependency>
    <groupId>io.github.java-diff-utils</groupId>
    <artifactId>java-diff-utils</artifactId>
    <version>4.12</version>
</dependency>

官方文档api

判断节点是否发生变化 如文件增删改查

 List<String> original = Arrays.asList("This is a test senctence." +
                "\r\nThis is a test for diffutils");
        //对比文件
        List<String> revised = Arrays.asList("This is a test senctence." +
                "\r\nThis is a test for diffutils1");


        //两文件的不同点
        Patch<String> patch = DiffUtils.diff(original, revised);
        System.out.println(patch);
        List<AbstractDelta<String>> deltas = patch.getDeltas();
        deltas.forEach(delta -> {
            System.out.println(delta.getType());
            switch (delta.getType()) {
                case INSERT:
                    //新增
                    System.out.println("新增");
                    Chunk<String> insert = delta.getTarget();
                    int position = insert.getPosition();
                    System.out.println("+ " + (position + 1) + " " + insert.getLines());
                    break;
                case CHANGE:
                    //修改
                    System.out.println("修改");
                    Chunk<String> source = delta.getSource();
                    Chunk<String> target1 = delta.getTarget();
                    System.out.println("\n- " + (source.getPosition() + 1) + " " + source.getLines() + "\n+ " + "" + (target1.getPosition() + 1) + " " + target1.getLines());
                    break;
                case DELETE:
                    //删除
                    System.out.println("删除");
                    Chunk<String> delete = delta.getSource();
                    System.out.println("- " + (delete.getPosition() + 1) + " " + delete.getLines());
                    break;
                case EQUAL:
                    System.out.println("无变化");
                    break;
            }
        });

 输出

Patch{deltas=[[ChangeDelta, position: 0, lines: [This is a test senctence.
This is a test for diffutils] to [This is a test senctence.
This is a test for diffutils1]]]}
CHANGE
修改

- 1 [This is a test senctence.
This is a test for diffutils]
+ 1 [This is a test senctence.
This is a test for diffutils1]
进程已结束，退出代码为 0

用整体方式展示

 List<String> original = Arrays.asList("This is a test senctence." +
                "\r\nThis is a test for diffutils");
        //对比文件
        List<String> revised = Arrays.asList("This is a test senctence." +
                "\r\nThis is a test for diffutils1");


        //两文件的不同点
        Patch<String> patch = DiffUtils.diff(original, revised);
        //生成统一的差异格式
        List<String> unifiedDiff = UnifiedDiffUtils.generateUnifiedDiff("test1.txt", "test2.txt", original, patch, 0);

        System.out.println(unifiedDiff);

 输出

[--- test1.txt, +++ test2.txt, @@ -1,1 +1,1 @@, -This is a test senctence.
This is a test for diffutils, +This is a test senctence.
This is a test for diffutils1]

进程已结束，退出代码为 0