IoUtil：文件及流操作

package com.lms.common.util;
import java.io.*;
import java.nio.channels.FileChannel;
/**
 * @Author: 李孟帅
 * @Date: 2021-12-02 20:02
 * @Description:
 */
public class IoUtil {
    public static void copy(InputStream in, OutputStream out) throws IOException {
        BufferedOutputStream bos = new BufferedOutputStream(out);
        BufferedInputStream bis = new BufferedInputStream(in);
        byte[] buf = new byte[1024];
        int len;
        while ((len = bis.read(buf)) != -1) {
            bos.write(buf, 0, len);
        }
    }
    public static void copy(FileInputStream in, FileOutputStream out) throws IOException {
        FileChannel from = in.getChannel();
        FileChannel to = out.getChannel();
        long size = from.size();
        for (long left = size; left > 0; ) {
            left -= from.transferTo(size - left, left, to);
        }
    }
    public static void copy(File src, File dest) throws IOException {
        FileInputStream in = new FileInputStream(src);
        FileOutputStream out = new FileOutputStream(dest);
        copy(in, out);
        close(in);
        close(out);
    }
    public static void close(Closeable closeable) {
        if (null != closeable) {
            try {
                closeable.close();
            } catch (Exception ignored) {
            }
        }
    }
}