package cn.stat.p1.file;import java.io.File;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.Collections;import java.util.Enumeration;import java.util.Properties;public class qiefiledemo {private static int SIZE=1024*1024;    /**     * @param args     * @throws IOException      */    public static void main(String[] args) throws IOException {                //文件切割        File file=new File("D:\\3.avi");        splitFile(file);                //文件组合        File file2=new File("D:\\cc");        mergeFile(file2);    }    //文件组合    public static void mergeFile(File dir) throws IOException    {        //读取配置文件        File[] files =dir.listFiles(new sufFilter(".properties"));                //判断文件是否存在        if(files.length!=1)            throw new RuntimeException("文件不存在");                //创建文件流        File fl=files[0];        //获取文件信息        Properties prot=new Properties();        FileInputStream fis=new FileInputStream(fl);        prot.load(fis);                String filename=prot.getProperty("filename");        int count=Integer.parseInt(prot.getProperty("patconut"));                //获取目录下所有的碎片文件        File[] patfile=dir.listFiles(new sufFilter(".pat"));                if(patfile.length!=count)        {            throw new RuntimeException("数目不对");        }                        ArrayList
     
       al=new ArrayList
      
       ();        for(int i=0;i
       
         en=Collections.enumeration(al);        SequenceInputStream sis=new SequenceInputStream(en);        FileOutputStream fos=new FileOutputStream(new File(dir,filename));        byte[] buf=new byte[SIZE];        int len=0;        while((len=sis.read(buf))!=-1)        {            fos.write(buf,0,len);        }        fos.close();        sis.close();                    }            //文件切割    public static void splitFile(File file) throws IOException    {        //用于读取流的关联文件        FileInputStream fis=new FileInputStream(file);        //定义一个1M的缓冲区        byte[] buf=new byte[SIZE];                //创建目地        FileOutputStream fos=null;                //创建文件切割配置文件信息        Properties prop=new Properties();                int conut=0;        int len=0;                File dir=new File("D:\\cc");        if(!dir.exists())        {            dir.mkdir();        }                while((len=fis.read(buf))!=-1)        {            fos=new FileOutputStream(new File(dir,(conut++)+".pat"));            fos.write(buf,0,len);        }                //创建配置文件        fos=new FileOutputStream(new File(dir,conut+".properties"));        prop.setProperty("patconut",conut+"");        prop.setProperty("filename",file.getName());        prop.store(fos,"");                        fos.close();        fis.close();            }}
       
      
     

 

package cn.stat.p1.file;import java.io.File;import java.io.FilenameFilter;public class sufFilter implements FilenameFilter {        private String suffix;    @Override    public boolean accept(File dir, String name) {        // TODO Auto-generated method stub        return name.endsWith(suffix);    }    public sufFilter(String suffix) {        super();        this.suffix = suffix;    }}