分割，合并文件

分割，合并文件

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;

public class SplitFile {

	public static void split() throws Exception {
		FileInputStream fis = new FileInputStream("d:\\360\\src.zip");
		FileOutputStream fos = null;
		byte[] buf = new byte[1024*1024];
		int len = 0;
		int count = 0;
		while ((len = fis.read(buf))!=-1) {
			count++;
			fos = new FileOutputStream("d:\\360\\"+count+".temp");
			fos.write(buf, 0, len);
			fos.close();
		}
		fis.close();
	}
	
	public static void merge() throws IOException {
		List<FileInputStream> list = new ArrayList<>();
		for(int i=1; i<=4; i++){
			list.add(new FileInputStream("d:\\360\\"+i+".temp"));
		}
		final Iterator<FileInputStream> iterator = list.iterator();
		Enumeration<FileInputStream> enumeration = new Enumeration<FileInputStream>() {

			@Override
			public boolean hasMoreElements() {
				
				return iterator.hasNext();
			}

			@Override
			public FileInputStream nextElement() {
				
				return iterator.next();
			}
		};
		SequenceInputStream sis = new SequenceInputStream(enumeration);
		FileOutputStream fos = new FileOutputStream("d:\\360\\abc.zip");
		byte[] buf = new byte[1024*1024];
		int len = 0;
		while ((len=sis.read(buf))!=-1) {
			fos.write(buf, 0, len);
		}
		fos.close();
		sis.close();
	}
	
	public static void main(String[] args) throws Exception {
		merge();
	}
	
}