IO流拆分以及合并文件

import java.io.*; import java.util.Enumeration; import java.util.Vector; public class Demo9 { public static void main(String[] args) { spiltFile(); MergeFile(); } private static void MergeFile() {//合并文件 FileInputStream fileInputStream=null; SequenceInputStream sequenceInputStream=null; FileOutputStream fileOutputStream=null; try { File file=new File("D:\\Temp","合集.mp3"); fileOutputStream =new FileOutputStream(file); Vector<FileInputStream> vector=new Vector<>(); for (int i = 1; i <=5 ; i++) { File file1=new File("D:\\Temp",i+".mp3"); fileInputStream=new FileInputStream(file1); vector.add(fileInputStream); } Enumeration<FileInputStream> elements = vector.elements(); sequenceInputStream=new SequenceInputStream(elements); int len=0; byte[] bytes=new byte[1024*8]; while ((len=sequenceInputStream.read(bytes))!=-1){ fileOutputStream.write(bytes,0,len); fileOutputStream.flush(); } }catch (Exception e){ e.printStackTrace(); }finally { if (fileOutputStream != null) { try { fileOutputStream.close(); } catch (IOException e) { e.printStackTrace(); } } if (sequenceInputStream != null) { try { sequenceInputStream.close(); } catch (IOException e) { e.printStackTrace(); } } if (fileInputStream!= null) { try { fileInputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } } private static void spiltFile() {//拆分文件 RandomAccessFile in=null; RandomAccessFile out=null; RandomAccessFile out1=null; try{ File file=new File("C:\\Users\\Administrator\\Desktop\\mp3\\许巍 - 蓝莲花.mp3"); in=new RandomAccessFile(file,"rw"); //System.out.println(file.length()); long ls = file.length() /(1024*1024); for (int i = 1; i <=ls ; i++) { File file1=new File("D:\\temp",i+".mp3"); out=new RandomAccessFile(file1,"rw"); byte[] bytes=new byte[1024*1024]; in.read(bytes); out.write(bytes,0,1024*1024); in.seek(in.getFilePointer()); } File file2=new File("D:\\temp",ls+1+".mp3"); out1=new RandomAccessFile(file2,"rw"); int len=0; byte[] bytes=new byte[1024*8]; while ((len=in.read(bytes))!=-1){ out1.write(bytes,0,len); } }catch (Exception e){ e.printStackTrace(); }finally { if (out1 != null) { try { out1.close(); } catch (IOException e) { e.printStackTrace(); } } if (out != null) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } if (in != null) { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } } } 

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