获取音频时长

网络文件暂存为临时文件，读取时长

pom文件

<dependency>
    <groupId>it.sauronsoftware</groupId>
    <artifactId>jave</artifactId>
    <version>1.0.2</version>
</dependency>

这个jar包不在maven私服上

jar包下载地址 ：http://www.java2s.com/Code/Jar/j/Downloadjave102jar.htm

安装到本地maven仓库：

mvn install:install-file -DgroupId=it.sauronsoftware -DartifactId=jave -Dversion=1.0.2 -Dpackaging=jar -Dfile=C:UserspxwxDownloadsjave-1.0.2.jar

/**
     * 获取网络文件，暂存为临时文件
     * @param url
     * @return
     * @throws UnknownHostException
     * @throws IOException
     */
    public static File getFileByUrl(String url) throws UnknownHostException, IOException{
        File tmpFile = File.createTempFile("temp", ".tmp");//创建临时文件
        Image2Binary.toBDFile(url, tmpFile.getCanonicalPath());
        return tmpFile;
    }

    /**
     * 获取时长
     * @return
     * @throws IOException
     * @throws EncoderException
     */
    public static long getDuration(File file) throws EncoderException {
        MultimediaInfo m = new Encoder().getInfo(file);
        return m.getDuration();
    }

    /**
     * 获取http://mp4.res.hunantv.com/new_video/28/7A0B569858C4B58526273897A2321658_20170926_1_1_256.mp4
     * 时长信息和大小信息
     * @param args
     */
    public static void main(String[] args) {
        try {
                //网络音频需要暂存为临时文件。如果是本地文件，File file = new File("C:\xx.mp3");
            File file = getFileByUrl("https://resource.puxinwangxiao.com/gaozhongbibeiwenyanwengushici_4.mp3");
            System.out.println("视频大小：" + file.length() / 1024 + "kb");
            System.out.println("视频时长：" + getDuration(file) / 1000 + "s");


        } catch (Exception e) {
            // TODO: handle exception
        }
    }

package com.puxinwangxiao.mts.util;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.UnknownHostException;

import org.apache.commons.codec.digest.DigestUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class Image2Binary
{
    private static Logger log = LoggerFactory.getLogger(Image2Binary.class);

    public static byte[] toByteArray(InputStream in) throws IOException {

        ByteArrayOutputStream out=new ByteArrayOutputStream();
        byte[] buffer=new byte[1024*4];
        int n=0;
        while ( (n=in.read(buffer)) !=-1) {
            out.write(buffer,0,n);
        }
        return out.toByteArray();
    }

    /**
     * 网络文件转换为byte二进制
     * @Title: toByteArray
     * @Description: TODO(这里用一句话描述这个方法的作用)
     * @param @param url
     * @param @return
     * @param @throws IOException    设定文件
     * @return byte[]    返回类型
     * @throws
     */
    public static byte[] toByteArray(String urlStr) throws IOException {
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        DataInputStream in = new DataInputStream(conn.getInputStream());
        ByteArrayOutputStream out=new ByteArrayOutputStream();
        byte[] buffer=new byte[1024*4];
        int n=0;
        while ( (n=in.read(buffer)) !=-1) {
            out.write(buffer,0,n);
        }
        return out.toByteArray();
    }

    /**
     * @throws IOException
     * @throws MalformedURLException
     * 网络文件转换为本地文件
     * @Title: toByteArray
     * @Description: TODO(这里用一句话描述这个方法的作用)
     * @param @param url
     * @param @return
     * @param @throws IOException    设定文件
     * @return byte[]    返回类型
     * @throws
     */
    public static void toBDFile(String urlStr, String bdUrl) throws IOException,UnknownHostException{
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        DataInputStream in = new DataInputStream(conn.getInputStream());
        byte[] data=toByteArray(in);
        in.close();
        FileOutputStream out=new FileOutputStream(bdUrl);
        out.write(data);
        out.close();
    }

    /**
     * 直接获取网络文件的md5值
     * @param urlStr
     * @return
     */
    public static String getMd5ByUrl(String urlStr){
        String md5 = null;
        try {
            URL url = new URL(urlStr);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            DataInputStream in = new DataInputStream(conn.getInputStream());
            md5 = DigestUtils.md5Hex(in);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return md5;
    }

    /**
     * 获取网络文件的输入流
     * @param urlStr
     * @return
     */
    public static InputStream getInputStreamByUrl(String urlStr){
        DataInputStream in = null;
        try {
            URL url = new URL(urlStr);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            in = new DataInputStream(conn.getInputStream());
        } catch (IOException e) {
            log.error("url转换输入流失败,错误信息{}",e.getMessage());
        }
        return in;
    }


    public static void main(String[] args)
    {
//        try {
//            toBDFile("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1496324940814&di=1d70e0de447be6547c372718b9b30ff6&imgtype=0&src=http%3A%2F%2Fimage.tianjimedia.com%2FuploadImages%2F2015%2F204%2F22%2FYMG9CAUWUM15.jpg","E://a.jpg");
//        } catch (IOException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
        String a = getMd5ByUrl("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1496324940814&di=1d70e0de447be6547c372718b9b30ff6&imgtype=0&src=http%3A%2F%2Fimage.tianjimedia.com%2FuploadImages%2F2015%2F204%2F22%2FYMG9CAUWUM15.jpg");
        System.out.println(a);
    }
}