java | 遍历目录中的文件

遍历目录中的文件。

package com.redisc;

import lombok.extern.slf4j.Slf4j;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;

@Slf4j(topic = "c.Test")
public class Run {

    public static void main(String[] args) throws IOException {
        Files.walkFileTree(Paths.get("src/main"), new SimpleFileVisitor<Path>() {
            @Override
            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                System.out.println("====>" + dir);
                return super.preVisitDirectory(dir, attrs);
            }

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                System.out.println(file);
                return super.visitFile(file, attrs);
            }
        });
    }

}

删除文件夹和文件

package com.redisc;

import lombok.extern.slf4j.Slf4j;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;

@Slf4j(topic = "c.Test")
public class Run {

    public static void main(String[] args) throws IOException {
        m1();
    }

    private static void m1() throws IOException {
        Files.walkFileTree(Paths.get("src/main"), new SimpleFileVisitor<Path>() {
            @Override
            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                System.out.println("进入====>" + dir);
                Files.delete(dir);
                return super.preVisitDirectory(dir, attrs);
            }

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                Files.delete(file);
                return super.visitFile(file, attrs);
            }

            @Override
            public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
                System.out.println("退出====>" + dir);
                Files.delete(dir);
                return super.postVisitDirectory(dir, exc);
            }
        });
    }

}

拷贝目录

package com.redisc;

import lombok.extern.slf4j.Slf4j;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;

@Slf4j(topic = "c.Test")
public class Run {

    public static void main(String[] args) throws IOException {
        m1();
    }

    private static void m1() throws IOException {
        String source = "";
        String target = "";
        Files.walk(Paths.get(source).forEach(path -> {
            String targetName = path.toString().replace(source, target);
            // 是目录
            if (Files.isDirectory(path)) {
                try {
                    Files.createDirectory(Paths.get(targetName));
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } else if (Files.isRegularFile(path)) {
                try {
                    Files.copy(path, Paths.get(targetName));
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        })
    }

}