package com.ard.route.util;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URL;
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import java.nio.file.Files;
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/**
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* Author:Cleaner
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* Date: 2025/5/29 17:16
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**/
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public class FileUtils {
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public static File convertMultipartFileToFile(MultipartFile multipartFile) throws IOException {
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// 获取原始文件名
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String originalFilename = multipartFile.getOriginalFilename();
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// 创建临时文件（建议加上后缀）
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File file = File.createTempFile("temp-", originalFilename != null ? originalFilename.substring(originalFilename.lastIndexOf(".")) : null);
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// 将 MultipartFile 转为 File
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multipartFile.transferTo(file);
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// JVM 退出时删除临时文件（可选）
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file.deleteOnExit();
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return file;
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}
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public static File downloadUrlToTempFile(String urlStr) throws IOException {
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URL url = new URL(urlStr);
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File tempFile = Files.createTempFile("download-", "zip").toFile();
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try (InputStream in = url.openStream(); FileOutputStream out = new FileOutputStream(tempFile)) {
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byte[] buffer = new byte[8192];
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int bytesRead;
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while ((bytesRead = in.read(buffer)) != -1) {
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out.write(buffer, 0, bytesRead);
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}
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}
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tempFile.deleteOnExit(); // JVM 退出时删除
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return tempFile;
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}
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}
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