'commit'

src/main/java/com/dsideal/QingLong/Render/ImageRender.java

@@ -0,0 +1,47 @@
+package com.dsideal.QingLong.Render;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.apache.commons.io.FileUtils;
+
+import com.jfinal.render.Render;
+
+/**
+ * 用来向客户端渲染图片
+ *
+ * @author CC11001100
+ */
+public class ImageRender extends Render {
+
+    /**
+     * 要渲染到客户端去的图像文件
+     */
+    private File imgFile;
+
+    public ImageRender(File imgFile) {
+        super();
+        this.imgFile = imgFile;
+    }
+
+    public File getImgFile() {
+        return imgFile;
+    }
+
+    public void setImgFile(File imgFile) {
+        this.imgFile = imgFile;
+    }
+
+    /**
+     * 将特定的图片写回到客户端
+     */
+    public void render() {
+        response.setContentType("image/jpeg");
+        try {
+            FileUtils.copyFile(imgFile, response.getOutputStream());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+}

src/main/java/com/dsideal/QingLong/YunXiao/Controller/YunXiaoController.java

@@ -1,9 +1,11 @@
 package com.dsideal.QingLong.YunXiao.Controller;
 
 import com.dsideal.QingLong.Interceptor.IsLoginInterface;
+import com.dsideal.QingLong.Render.ImageRender;
 import com.dsideal.QingLong.Util.CommonUtil;
 import com.dsideal.QingLong.YunXiao.Model.YunXiaoModel;
 import com.dsideal.QingLong.YunXiao.Util.YunXiaoExportExcelUtil;
+import com.dsideal.QingLong.YunXiao.Util.YunXiaoVideoUtil;
 import com.jfinal.aop.Before;
 import com.jfinal.core.Controller;
 import com.jfinal.ext.interceptor.GET;
@@ -112,7 +114,7 @@ public class YunXiaoController extends Controller {
         //获取系统临时目录
         String tmpDir = System.getProperty("java.io.tmpdir");
         //使用guid生成一个临时文件名，然后拼接到tmpDir后面，生成完整的临时文件路径
-        String tmpFile = tmpDir + File.separator + UUID.randomUUID() + ".xlsx";
+        String tmpFile = tmpDir +  UUID.randomUUID() + ".xlsx";
         exporter.LessonConstructionExportExcel(tmpFile, list1, list2, list3);
         //提供下载
         renderFile(new File(tmpFile), "课程建设情况报表.xlsx");
@@ -133,9 +135,25 @@ public class YunXiaoController extends Controller {
         //获取系统临时目录
         String tmpDir = System.getProperty("java.io.tmpdir");
         //使用guid生成一个临时文件名，然后拼接到tmpDir后面，生成完整的临时文件路径
-        String tmpFile = tmpDir + File.separator + UUID.randomUUID() + ".xlsx";
+        String tmpFile = tmpDir + UUID.randomUUID() + ".xlsx";
         exporter.LessonConstructionInfoByXzqhSchool(tmpFile, list1, list2, list3, list4);
         //提供下载
         renderFile(new File(tmpFile), "【区域+学校】课程建设情况报表.xlsx");
     }
+
+    /**
+     * 生成视频截图
+     * @param url 视频地址
+     */
+    // http://10.10.21.20:9000/QingLong/yx/getLessonCover?url=
+    @Before(GET.class)
+    public void getLessonCover(String url) {
+        //获取系统临时目录
+        String tmpDir = System.getProperty("java.io.tmpdir");
+        //使用guid生成一个临时文件名，然后拼接到tmpDir后面，生成完整的临时文件路径
+        String tmpFile = tmpDir +  UUID.randomUUID() + ".jpg";
+        YunXiaoVideoUtil.getCover(url, tmpFile);
+        File imgFile = new File(tmpFile);
+        render(new ImageRender(imgFile));
+    }
 }

src/main/java/com/dsideal/QingLong/YunXiao/Util/YunXiaoVideoUtil.java

@@ -2,11 +2,15 @@ package com.dsideal.QingLong.YunXiao.Util;
 
 import cn.hutool.core.util.RuntimeUtil;
 
+import java.io.File;
+
 public class YunXiaoVideoUtil {
     //MP4的片头长10秒
     public static final int MP4 = 10;
     //MU38的片头长7秒
-    public static final int M3U8 = 16;
+    public static final int M3U8 = 5;
+    //ffmpeg路径
+    public static final String FFMPEG_PATH = "D:\\ffmpeg\\ffmpeg.exe";
 
     /**
      * 获取视频封面
@@ -16,23 +20,48 @@ public class YunXiaoVideoUtil {
      * @param videoOutputPath
      * @return
      */
-    private static String getCmd(String ffmpegPath, int seconds, String videoInputPath, String videoOutputPath) {
+    private static String getCmdMp4(String ffmpegPath, int seconds, String videoInputPath, String videoOutputPath) {
         return ffmpegPath + " -ss " + seconds + " -i " + videoInputPath + " -frames:v 1 -q:v 2 -s 1280x720 " + videoOutputPath;
     }
 
+    /**
+     * 截取m3u8视频封面
+     *
+     * @param ffmpegPath
+     * @param seconds
+     * @param videoInputPath
+     * @param videoOutputPath
+     * @return
+     */
+    private static String getCmdM3u8(String ffmpegPath, int seconds, String videoInputPath, String videoOutputPath) {
+        return ffmpegPath + " -i " + videoInputPath + " -ss " + seconds + " -vframes 1 -s 1280x720 " + videoOutputPath;
+    }
+
     /**
      * 获取视频封面
      *
-     * @param ffmpegPath      ffmpeg路径
      * @param videoInputPath  输入的视频路径
      * @param videoOutputPath 输出的图片路径
      * @return
      */
-    public static String getCmd(String ffmpegPath, String videoInputPath, String videoOutputPath) {
-        if (videoInputPath.toLowerCase().equals(".m3u8")) {
-            return getCmd(ffmpegPath, M3U8, videoInputPath, videoOutputPath);
+    public static String getCmd(String videoInputPath, String videoOutputPath) {
+        if (videoInputPath.toLowerCase().endsWith(".m3u8")) {
+            return getCmdM3u8(FFMPEG_PATH, M3U8, videoInputPath, videoOutputPath);
         }
-        return getCmd(ffmpegPath, MP4, videoInputPath, videoOutputPath);
+        return getCmdMp4(FFMPEG_PATH, MP4, videoInputPath, videoOutputPath);
+    }
+
+    /**
+     * 获取视频封面
+     * @param url
+     * @param JpegPath
+     */
+    public static void getCover(String url, String JpegPath) {
+        String cmd = getCmd(url, JpegPath);
+        //使用java调用ffmpeg命令行工具生成图片
+        RuntimeUtil.exec(cmd);
+
+        System.out.println(JpegPath);
     }
 
     public static void main(String[] args) {
@@ -43,9 +72,9 @@ public class YunXiaoVideoUtil {
                 "https://ccmsyk-video.edusoa.com/down/M3u8/9A/9A69A401-BF92-433D-AB96-7B9965BDDD87.m3u8"
         };
         for (int i = 0; i < a.length; i++) {
-            String cmd = getCmd("D:\\ffmpeg\\ffmpeg.exe", a[i], "c:\\" + (i + 1) + ".jpg");
-            //使用java调用ffmpeg命令行工具生成图片
-            RuntimeUtil.exec(cmd);
+            File f = new File("c:\\" + (i + 1) + ".jpg");
+            if (f.exists()) f.delete();
+            getCover(a[i], f.getAbsolutePath());
         }
     }
 }