spring boot 导出压缩包

在Spring Boot中，可以使用Java的ZipOutputStream类来实现导出压缩包的功能。下面是一个示例代码：

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipUtil {
    public static void zipFiles(String sourceFolderPath, String zipFilePath) throws IOException {
        FileOutputStream fos = new FileOutputStream(zipFilePath);
        ZipOutputStream zipOut = new ZipOutputStream(fos);

        File fileToZip = new File(sourceFolderPath);

        zipFile(fileToZip, fileToZip.getName(), zipOut);

        zipOut.close();
        fos.close();
    }

    private static void zipFile(File fileToZip, String fileName, ZipOutputStream zipOut) throws IOException {
        if (fileToZip.isHidden()) {
            return;
        }
        if (fileToZip.isDirectory()) {
            if (fileName.endsWith("/")) {
                zipOut.putNextEntry(new ZipEntry(fileName));
                zipOut.closeEntry();
            } else {
                zipOut.putNextEntry(new ZipEntry(fileName + "/"));
                zipOut.closeEntry();
            }
            File[] children = fileToZip.listFiles();
            for (File childFile : children) {
                zipFile(childFile, fileName + "/" + childFile.getName(), zipOut);
            }
            return;
        }
        FileInputStream fis = new FileInputStream(fileToZip);
        ZipEntry zipEntry = new ZipEntry(fileName);
        zipOut.putNextEntry(zipEntry);

        byte[] bytes = new byte[1024];
        int length;
        while ((length = fis.read(bytes)) >= 0) {
            zipOut.write(bytes, 0, length);
        }

        fis.close();
    }
}

你可以调用`zipFiles`方法来实现将指定文件夹下的所有文件压缩成一个zip文件。例如：

String sourceFolderPath = "/path/to/source/folder";
String zipFilePath = "/path/to/zip/file.zip";
ZipUtil.zipFiles(sourceFolderPath, zipFilePath);

这样就可以将`sourceFolderPath`文件夹下的所有文件压缩成一个名为`file.zip`的zip文件。