vue+springboot文件夹压缩下载

您可以使用以下步骤将文件夹压缩并提供下载：

1. 在后端(Spring Boot)中，使用`java.util.zip`库将文件夹压缩为ZIP文件。您可以使用以下代码示例：

public void zipFolder(String sourceFolderPath, String zipFilePath) throws Exception {
    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 void zipFile(File fileToZip, String fileName, ZipOutputStream zipOut) throws Exception {
    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();
}

2. 在前端(Vue.js)中，使用axios库将ZIP文件下载到客户端。您可以使用以下代码示例：

downloadZip() {
  axios({
    url: "/api/zip",
    method: "GET",
    responseType: "blob"
  }).then(response => {
    const url = window.URL.createObjectURL(new Blob([response.data]));
    const link = document.createElement("a");
    link.href = url;
    link.setAttribute("download", "folder.zip");
    document.body.appendChild(link);
    link.click();
  });
}

3. 在后端中，创建一个REST API端点，以便Vue.js应用程序可以下载ZIP文件。您可以使用以下代码示例：

@RestController
@RequestMapping("/api")
public class ZipController {
    @GetMapping(value = "/zip", produces = "application/zip")
    public void downloadZip(HttpServletResponse response) throws Exception {
        String sourceFolderPath = "path/to/folder";
        String zipFilePath = "path/to/folder.zip";

        zipFolder(sourceFolderPath, zipFilePath);

        File file = new File(zipFilePath);
        InputStream inputStream = new FileInputStream(file);

        response.setHeader("Content-Disposition", "attachment; filename=\"folder.zip\"");
        IOUtils.copy(inputStream, response.getOutputStream());
        response.flushBuffer();
    }
}

注意：您需要将“path/to/folder”替换为实际的文件夹路径。