package com.ruoyi.admin.utils;
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import org.apache.http.entity.ContentType;
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import org.springframework.mock.web.MockMultipartFile;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.*;
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import java.net.URL;
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public class UrlToMultipartFileUtil {
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// url: 链接,可访问的图片,视频,或其他文件
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public static MultipartFile urlTransferMultipartFile(String url){
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//对本地文件命名,可以从链接截取,可以自己手写,看需求 https://huishou-1323682843.cos.ap-nanjing.myqcloud.com/images/98c0800f-3178-4db5-bf21-d53de2ed7849.jpg
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// 截取出文件名,不包含尾缀
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String fileName = url.substring(url.lastIndexOf("-") + 1);
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File file = null;
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URL urlfile;
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InputStream inStream = null;
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OutputStream os = null;
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MultipartFile multipartFile = null;
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try {
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file = File.createTempFile("avatar", fileName);
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//下载
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urlfile = new URL(url);
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inStream = urlfile.openStream();
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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 = inStream.read(buffer, 0, 8192)) != -1) {
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os.write(buffer, 0, bytesRead);
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}
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// file转multipartFile,如果只需要转File就不用加下面这两行代码,直接返回File即可
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FileInputStream inputStream = new FileInputStream(file);
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multipartFile = new MockMultipartFile(file.getName(), file.getName(),
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ContentType.APPLICATION_OCTET_STREAM.toString(), inputStream);
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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try {
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if (null != os) {
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os.close();
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}
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if (null != inStream) {
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inStream.close();
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}
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// 用完删除
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if (null != file){
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file.delete();
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}
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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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// 按需返回file还是multipartFile
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return multipartFile;
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}
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}
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