Java的新项目学成在线笔记-day13（十）

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//测试文件合并方法 @Test public void testMerge() throws IOException {

    //块文件目录  

  File chunkFolder = new File("F:/develop/ffmpeg/chunk/");

    //合并文件 

   File mergeFile = new File("F:/develop/ffmpeg/lucene1.mp4");

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if(mergeFile.exists()){       

 mergeFile.delete(); 

   }   

 //创建新的合并文件

    mergeFile.createNewFile();  

  //用于写文件   

 RandomAccessFile raf_write = new RandomAccessFile(mergeFile, "rw");  

  //指针指向文件顶端 

   raf_write.seek(0);  

  //缓冲区  

  byte[] b = new byte[1024]; 

   //分块列表 

   File[] fileArray = chunkFolder.listFiles();  

  // 转成集合，便于排序  

  List<File> fileList = new ArrayList<File>(Arrays.asList(fileArray)); 

   // 从小到大排序

    Collections.sort(fileList, new Comparator<File>() {   

     @Override      

  public int compare(File o1, File o2) {    

        if (Integer.parseInt(o1.getName()) < Integer.parseInt(o2.getName())) {   

             return ‐1;   

         }         

   return 1;   

     }  

  });  

  //合并文件  

  for(File chunkFile:fileList){  

      RandomAccessFile raf_read = new RandomAccessFile(chunkFile,"rw"); 

       int len = ‐1;  

      while((len=raf_read.read(b))!=‐1){   

         raf_write.write(b,0,len);   

       }     

   raf_read.close();  

  }

    raf_write.close(); 

 }