xxl.mathematica.io.CopyFile Maven / Gradle / Ivy

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package xxl.mathematica.io;

import io.vavr.control.Try;
import org.apache.commons.io.IOUtils;

import java.io.*;

/**
 * 复制文件
 */
public class CopyFile {
    /**
     * 复制文件
     *
     * @param src
     * @param dst
     * @return
     */
    public static String copyFile(String src, String dst, boolean overwrite) {
        return Try.ofCallable(() -> {
            String parentDirectory = ParentDirectory.parentDirectory(dst);
            File parent = new File(parentDirectory);
            if (!parent.exists() && !parent.mkdirs()) {
                return null;
            }
            if (FileExistsQ.fileExistsQ(dst) && !overwrite) {
                return null;
            }
            InputStream is = new FileInputStream(src);
            OutputStream os = new FileOutputStream(dst);
            int len = IOUtils.copy(is, os);
            os.flush();
            is.close();
            os.close();
            if (len == -1) {
                return null;
            }
            return dst;
        }).getOrNull();
    }

    /**
     * 默认存在时覆盖
     *
     * @param src
     * @param dst
     * @return
     */
    public static String copyFile(String src, String dst) {
        return copyFile(src, dst, true);
    }
}