2.3.2 遍历目录树

时间:2021-10-10 12:30:20

Java 7支持整个目录树的遍历;

Demo:

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

/**列出子目录下的所有java源码文件
*
@author jinxing
* @准备
* /Users/jinxing/Documents/pathtest/path1 log4j.xml、shortUrl.properties、weixinjsapi.properties
* /Users/jinxing/Documents/pathtest/path1/tt ttson.java
*/
public class PathFind {

public static void main(String[] args) throws IOException {

Path startingDir
= Paths.get("/Users/jinxing/Documents/pathtest/path1");

// 5.调用walkFileTree:整个过程从此开始;
Files.walkFileTree(startingDir, new FindJavaVisitor());

}

// 其他用例包括递归移动、复制、删除或者修改文件;在大多数应用场景中,你只需要扩展 SimpleFileVisitor;
// 1.扩展 SimpleFileVisitor<Path>
private static class FindJavaVisitor extends SimpleFileVisitor<Path> {

/** 2.唯一要做的就是重写 visitFile,让它来为你工作; **/
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {

// 3.过滤所有java源码文件
if (file.toString().endsWith(".java")) {
System.out.println(file.getFileName());
}

// 4.return
return FileVisitResult.CONTINUE;

}

}

}

Ran As Java Application:

test.java
test2.java
ttson.java