package com.chinaztt.mes.common.util;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.*;
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import java.util.Objects;
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/**
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* @Author 张宾
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* @Date 2022/8/5
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*/
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public class MultipartFileToFile {
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/**
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* MultipartFile 转 File
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*
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* @param file
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* @throws Exception
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*/
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public static File multipartFileToFile(MultipartFile file) {
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File toFile = null;
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try {
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if ("".equals(file) || file.getSize() <= 0) {
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file = null;
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} else {
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InputStream ins = null;
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ins = file.getInputStream();
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toFile = new File(Objects.requireNonNull(file.getOriginalFilename()));
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inputStreamToFile(ins, toFile);
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ins.close();
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}
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}catch (IOException e){
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e.printStackTrace();
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}
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return toFile;
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}
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//获取流文件
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private static void inputStreamToFile(InputStream ins, File file) {
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try {
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OutputStream os = new FileOutputStream(file);
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int bytesRead = 0;
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byte[] buffer = new byte[8192];
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while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
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os.write(buffer, 0, bytesRead);
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}
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os.close();
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ins.close();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* 删除本地临时文件
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* @param file
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*/
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public static void delteTempFile(File file) {
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if (file != null) {
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File del = new File(file.toURI());
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del.deleteOnExit();
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}
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}
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}
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