package org.springblade.common.utils;
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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.IOException;
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public class FileUtil {
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/**
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* MultipartFile 转 file
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* @param multipartFile
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* @return
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*/
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public static File toFile(MultipartFile multipartFile) {
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// 如果multipartFile为空，则直接返回null
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if (multipartFile == null) {
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return null;
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}
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// 创建一个临时的文件
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File file = null;
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try {
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file = File.createTempFile("temp", multipartFile.getOriginalFilename());
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multipartFile.transferTo(file);
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} catch (IOException e) {
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e.printStackTrace();
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}
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return file;
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}
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/**
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* 获取文件后缀
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* @param file
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* @return
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*/
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public static String getFileExtension(MultipartFile file) {
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String originalFilename = file.getOriginalFilename();
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String extension = "";
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if (originalFilename != null) {
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int dotIndex = originalFilename.lastIndexOf(".");
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if (dotIndex >= 0) {
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extension = originalFilename.substring(dotIndex + 1);
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}
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}
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return extension;
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}
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}
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