src/main/java/cc/mrbird/febs/common/utils/FileUtil.java

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package cc.mrbird.febs.common.utils;

import cc.mrbird.febs.common.entity.FebsConstant;
import com.google.common.base.Preconditions;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.util.FileSystemUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * @author MrBird
 */
@Slf4j
public abstract class FileUtil {

    private static final int BUFFER = 1024 * 8;

    /**
     * 压缩文件或目录
     *
     * @param fromPath 待压缩文件或路径
     * @param toPath   压缩文件，如 xx.zip
     */
    public static void compress(String fromPath, String toPath) throws IOException {
        File fromFile = new File(fromPath);
        File toFile = new File(toPath);
        if (!fromFile.exists()) {
            throw new FileNotFoundException(fromPath + "不存在！");
        }
        try (
                FileOutputStream outputStream = new FileOutputStream(toFile);
                CheckedOutputStream checkedOutputStream = new CheckedOutputStream(outputStream, new CRC32());
                ZipOutputStream zipOutputStream = new ZipOutputStream(checkedOutputStream)
        ) {
            String baseDir = "";
            compress(fromFile, zipOutputStream, baseDir);
        }
    }

    /**
     * 文件下载
     *
     * @param filePath 待下载文件路径
     * @param fileName 下载文件名称
     * @param delete   下载后是否删除源文件
     * @param response HttpServletResponse
     * @throws Exception Exception
     */
    public static void download(String filePath, String fileName, Boolean delete, HttpServletResponse response) throws Exception {
        File file = new File(filePath);
        if (!file.exists()) {
            throw new Exception("文件未找到");