文件的切割与合并（视频文件或者压缩文件）

public class Test {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		try {
			segmentation();   //文件的切割
			aggregation();	 //文件的合并	
		} catch (IOException e) {
			
			e.printStackTrace();
		}
		
	}
	
	public static void segmentation() throws IOException{
		//选中的文件地址是       D:\soft\screencapture.zip 大小为197MB
		File file=new File("D:\\soft\\screencapture.zip");
		InputStream in=new FileInputStream(file);	
		OutputStream out=null;
		byte[] bytes=new byte[(int) (file.length()/5)+1];	
		System.out.println(file.length());
		for (int i = 0; i < 5; i++) {		
			File file2 =new File("D:\\soft\\screencapture"+i+".zip");
			out=new FileOutputStream(file2);
			int len=in.read(bytes);
			out.write(bytes,0,len);
			
		}
		out.close();
		in.close();
	}
	
	public static void aggregation() throws IOException{			
		InputStream in=null;
		OutputStream out=null;
		for (int i = 0; i < 5; i++) {			
			File file =new File("D:\\soft\\screencapture"+i+".zip");
			in =new FileInputStream(file);
			out=new FileOutputStream("D:\\soft\\新.zip",true);
			int len =-1;
			byte[] b =new byte[10240];
			while ((len=in.read(b))!=-1) {
				out.write(b, 0, len);
			}
		}
		out.close();
		in.close();
	}
}