将网络资源文件转存本地

朴灿烈づ我的快乐病毒、 2022-11-15 14:07 115阅读 0赞

package com.qiniu.ufop.utils;
    
    import lombok.extern.slf4j.Slf4j;
    
    import java.io.*;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.net.URLConnection;
    import java.util.UUID;
    
    
    /**
     * @Description
     * @project
     * @author：hf
     * @date：
     */
    @Slf4j
    public class CommonUtil {
    
        private static final String path="D:/usr/local/outDir/";
    
        private static final String suffix=".mp4";
    
        private static final int size=1024;
    
        /**
         * @Description: 根据url保存文件到本地
         * @Author: hf
         * @Time: 2021/4/1 11:38
         */
        public  static String downloadFromUrl(String url){
            //String fileName="D:\\"+getUUID(url)+".mp4";
            long startTime=System.currentTimeMillis();
            log.info("startTime:"+startTime);
            String fileName=getUUID(url);
            InputStream is =null;
            FileOutputStream outstream =null;
            try {
                URL urlVideo = new URL(url);
                URLConnection con = urlVideo.openConnection();
                //超时响应时间为10秒
                con.setConnectTimeout(10 * 1000);
                is = con.getInputStream();
                byte[] bs = new byte[size];
                File videofile = new File(fileName);
                if (!videofile.getParentFile().exists()) {
                    try {
                        videofile.getParentFile().mkdirs();
                        videofile.createNewFile();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                outstream = new FileOutputStream(videofile);
                //写入数据
                int len;
                while((len=is.read(bs)) != -1){
                    outstream.write(bs, 0, len);
                }
               log.info("耗时:"+(System.currentTimeMillis()-startTime)+"ms");
            }catch (Exception e){
                log.error(e.getMessage());
            }finally {
                try {
                    outstream.close();
                    is.close();
                } catch (IOException e) {
                    log.error(e.getMessage());
                }
            }
            return fileName;
        }
    
       /**
        * @Description: 本地文件转byte
        * @Author: hf
        * @Time: 2021/4/1 14:35
        */
        public static byte[] file2Byte(String filePath) {
            FileInputStream fis = null;
            ByteArrayOutputStream bos = null;
            byte[] data =null;
            try {
                File file = new File(filePath);
                fis = new FileInputStream(file);
                bos = new ByteArrayOutputStream(size);
                byte[] b = new byte[size];
                int n;
                while ((n = fis.read(b)) != -1) {
                    bos.write(b, 0, n);
                }
                 data = bos.toByteArray();
            } catch (Exception e) {
                log.error(e.getMessage());
            }finally {
                try {
                    fis.close();
                    bos.close();
                } catch (IOException e) {
                    log.error("getBytesByFile:"+e.getMessage());
                }
            }
            return data;
        }
    
        /**
         * @Description: url文件转byte
         * @Author: hf
         * @Time: 2021/4/1 14:23
         */
        public static byte[] video2byte(String path){
            byte[] data = null;
            URL url = null;
            InputStream input = null;
            ByteArrayOutputStream output =null;
            try{
                url = new URL(path);
                HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection();
                httpUrl.connect();
                httpUrl.getInputStream();
                input = httpUrl.getInputStream();
                output = new ByteArrayOutputStream();
                byte[] buf = new byte[1024];
                int numBytesRead = 0;
                while ((numBytesRead = input.read(buf)) != -1) {
                    output.write(buf, 0, numBytesRead);
                }
                data = output.toByteArray();
            }catch (Exception e) {
                log.error("video2byte:"+e.getMessage());
            }finally {
                try {
                    output.close();
                    input.close();
                } catch (IOException e) {
                    log.error("video2byte:"+e.getMessage());
                }
            }
            return data;
        }
        /**
         * @Description: 根据url获取文件路径
         * @Author: hf
         * @Time: 2021/4/1 14:23
         */
        public static synchronized String getUUID(String url){
            UUID uuid=UUID.nameUUIDFromBytes(url.getBytes());
            String str = uuid.toString();
            String uuidStr=str.replace("-", "");
            //直接拼接视频文件地址
            uuidStr=path+uuidStr+suffix;
            return uuidStr;
        }
    
    
        public static void main(String[] args) throws Exception {
            String url="https://media.w3.org/2010/05/sintel/trailer.mp4";
            System.out.println(downloadFromUrl( url));
            //System.out.println( file2Byte(downloadFromUrl( url)));
        }
    }