文件的切割：
import java.io.*; class SplitFilesDemo { public static void main(String[] args) throws Exception { File file = new File("a.avi"); BufferedInputStream bis = new BufferedInputStream( new FileInputStream(file)); FileOutputStream fos = null; byte[] buffer = new byte[1024*1024*10]; int length= 0,count = 1; while((length=bis.read(buffer))!=-1) { fos = new FileOutputStream("split\\"+count+++".part"); fos.write(buffer,0,length); fos.close(); } bis.close(); } }
使用合并流对象SequenceInputStream对文件进行合并
import java.io.*; import java.util.*; class MergeFilesDemo { public static void main(String[] args) throws Exception { List<FileInputStream> files = new ArrayList<FileInputStream>(); getFiles( new File("split"),".part",files); final Iterator<FileInputStream> it = files.iterator(); Enumeration<FileInputStream> em = new Enumeration<FileInputStream>(){ public boolean hasMoreElements() { return it.hasNext(); } public FileInputStream nextElement() { return it.next(); } }; SequenceInputStream sis = new SequenceInputStream(em); FileOutputStream fos = new FileOutputStream( new File("b.avi")); int length = 0; byte[] buffer = new byte[1024*1024*10]; while((length=sis.read(buffer))!=-1) { fos.write(buffer,0,length); } fos.close(); sis.close(); } public static void getFiles(File dir,String suffix,List<FileInputStream> listFiles) throws Exception { File[] files = dir.listFiles(); for(File file : files) { if(file.isDirectory()) { getFiles(file,suffix,listFiles); } else { if(file.getName().endsWith(suffix)) listFiles.add( new FileInputStream(file)); } } } }