java 生成差分包代码
时间: 2023-08-08 20:07:34 浏览: 36
Java 生成差分包的代码可以使用 Google 的开源库 DiffMatchPatch,以下是一个简单的示例:
```java
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.LinkedList;
import java.util.List;
import name.fraser.neil.plaintext.diff_match_patch;
public class DiffGenerator {
public static void main(String[] args) throws Exception {
String originalFilePath = "original.txt";
String modifiedFilePath = "modified.txt";
String patchFilePath = "patch.txt";
String originalContent = readFile(originalFilePath);
String modifiedContent = readFile(modifiedFilePath);
diff_match_patch differ = new diff_match_patch();
LinkedList<diff_match_patch.Diff> diffs = differ.diff_main(originalContent, modifiedContent);
differ.diff_cleanupSemantic(diffs);
List<diff_match_patch.Patch> patches = differ.patch_make(diffs);
String patchContent = differ.patch_toText(patches);
writeToFile(patchFilePath, patchContent);
}
private static String readFile(String filePath) throws IOException {
BufferedReader reader = new BufferedReader(new FileReader(filePath));
StringBuilder content = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
content.append(line).append("\n");
}
reader.close();
return content.toString();
}
private static void writeToFile(String filePath, String content) throws IOException {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath), StandardCharsets.UTF_8));
writer.write(content);
writer.close();
}
}
```
这个示例读取两个文本文件,生成它们之间的差分,然后将差分保存到另一个文本文件中。你需要将 `original.txt` 和 `modified.txt` 替换为实际的文件路径。如果你想要将差分应用到原始文件上,可以使用 diff_match_patch 库提供的 `patch_apply` 方法。