利用java-diff-util库的方式能否实现像winMerge一样自动将文件夹比较的结果以各个report的形式展现
时间: 2024-02-28 16:55:25 浏览: 25
是的,你可以使用 Java Diff Utils 库来比较两个文件夹,并将差异结果保存为 HTML 报告。你可以将 HTML 报告保存到文件中,并在需要的时候打开它以查看比较结果。下面是一个示例,演示如何使用 Java Diff Utils 库来比较两个文件夹并生成 HTML 报告:
```java
import java.io.File;
import java.io.IOException;
import java.util.List;
import org.apache.commons.io.FileUtils;
import difflib.DiffUtils;
import difflib.Patch;
import difflib.DiffRow;
import difflib.DiffRowGenerator;
import difflib.DiffRowGenerator.Builder;
import difflib.DiffRowGenerator.Style;
public class FolderComparator {
public static void main(String[] args) {
String folder1Path = "path/to/folder1";
String folder2Path = "path/to/folder2";
String reportPath = "path/to/report.html";
File folder1 = new File(folder1Path);
File folder2 = new File(folder2Path);
File reportFile = new File(reportPath);
StringBuilder reportBuilder = new StringBuilder();
reportBuilder.append("<html><body>");
compareFolders(folder1, folder2, reportBuilder);
reportBuilder.append("</body></html>");
try {
FileUtils.writeStringToFile(reportFile, reportBuilder.toString(), "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
}
private static void compareFolders(File folder1, File folder2, StringBuilder reportBuilder) {
File[] files1 = folder1.listFiles();
File[] files2 = folder2.listFiles();
for (File file1 : files1) {
File file2 = new File(folder2, file1.getName());
if (file2.exists()) {
if (file1.isDirectory() && file2.isDirectory()) {
reportBuilder.append("<h3>").append(file1.getName()).append("</h3>");
compareFolders(file1, file2, reportBuilder);
} else if (file1.isFile() && file2.isFile()) {
compareFiles(file1, file2, reportBuilder);
}
} else {
reportBuilder.append("<p>").append(file1.getAbsolutePath()).append(" only exists in ").append(folder1.getAbsolutePath()).append("</p>");
}
}
for (File file2 : files2) {
File file1 = new File(folder1, file2.getName());
if (!file1.exists()) {
reportBuilder.append("<p>").append(file2.getAbsolutePath()).append(" only exists in ").append(folder2.getAbsolutePath()).append("</p>");
}
}
}
private static void compareFiles(File file1, File file2, StringBuilder reportBuilder) {
List<String> lines1 = null;
List<String> lines2 = null;
try {
lines1 = FileUtils.readLines(file1, "UTF-8");
lines2 = FileUtils.readLines(file2, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
return;
}
Patch<String> patch = DiffUtils.diff(lines1, lines2);
List<DiffRow> diffRows = getDiffRows(patch);
if (diffRows.size() > 0) {
reportBuilder.append("<h3>").append(file1.getName()).append("</h3>");
reportBuilder.append("<table>");
for (DiffRow diffRow : diffRows) {
switch (diffRow.getTag()) {
case INSERT:
reportBuilder.append("<tr style='background-color: #cfc;'>");
reportBuilder.append("<td>+ ").append(diffRow.getNewLine()).append("</td>");
reportBuilder.append("</tr>");
break;
case DELETE:
reportBuilder.append("<tr style='background-color: #fcc;'>");
reportBuilder.append("<td>- ").append(diffRow.getOldLine()).append("</td>");
reportBuilder.append("</tr>");
break;
case CHANGE:
reportBuilder.append("<tr style='background-color: #ffc;'>");
reportBuilder.append("<td>- ").append(diffRow.getOldLine()).append("</td>");
reportBuilder.append("<td>+ ").append(diffRow.getNewLine()).append("</td>");
reportBuilder.append("</tr>");
break;
case EQUAL:
reportBuilder.append("<tr>");
reportBuilder.append("<td>").append(diffRow.getOldLine()).append("</td>");
reportBuilder.append("</tr>");
break;
}
}
reportBuilder.append("</table>");
}
}
private static List<DiffRow> getDiffRows(Patch<String> patch) {
Builder builder = new Builder();
builder.showInlineDiffs(true);
builder.ignoreWhitespace(false);
builder.ignoreCase(false);
builder.columnWidth(Integer.MAX_VALUE);
DiffRowGenerator generator = builder.build();
return generator.generateDiffRows(patch.getOldFile().getLines(), patch.getNewFile().getLines());
}
}
```
在这个示例中,我们定义了一个 `compareFolders` 方法来比较两个文件夹。如果两个文件夹中的文件名相同,则我们调用 `compareFiles` 方法来比较这两个文件的内容。我们使用 `java-diff-utils` 库来比较文件的内容,并将差异结果保存为 HTML 表格。最后,我们将所有比较结果保存为一个 HTML 文件。
请注意,我们使用了 `org.apache.commons.io.FileUtils` 来读取和写入文件,如果你没有使用该库,请先安装它。你可以将这个示例中的 `reportBuilder` 替换为你自己的报告生成方法。