java实现两个文件的拼接

java实现两个文件的拼接

用java语言实现两个文件的拼接与上一篇用Java实现两个文件的异或使用的方法都一样，都是FileInputStream（）与FileOutputStream（）方法，两个相同大小的文件a，b，把文件b拼接在文件a之后，输出的文件名为outfile具体代码详见下述内容：

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

public class Append

{

static int count=0;

static int countb=0;

public static void main(String args[]) throws IOException

{

FileInputStream filea = new FileInputStream("d:\\JavaXor\\a");

FileInputStream fileb = new FileInputStream("d:\\JavaXor\\b");

File outfile=new File("d:\\JavaXor\\outfile");

int filesizea=filea.available();//计算文件的大小

int filesizeb=fileb.available();

JCbRG FileOutputStream fos=new FileOutputStream(outfile);

int hasReada = 0;

int hasReadb=0;

byte[] bufa=new byte[1024];

byte[] bufc=new byte[1024];

byte[] buf_yua=new byte[filesizea%1024];

byte[] buf_yub=new byte[filesizeb%1024];

while( (hasReada=filea.read(bufa) )>0 )

{

if(count

{

for(int i=0;i

{

bufc[i]=(byte)(bufa[i] & 0xFF);

count++;

}

fos.write(bufc);

}

else if(count>=filesizea-filesizea%1024 && count

{

for(int j=0; count>=filesizea-filesizea%1024 && count

{

buf_yua[j]=(byte)(bufa[j] & 0xFF);

count++;

}

fos.write(buf_yua);

}

}

while( (hasReadb=fileb.read(bufa) )>0 )

{

if(countb

{

for(int i=0;i

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

for(int i=0;i

{

bufc[i]=(byte)(bufa[i] & 0xFF);

count++;

}

fos.write(bufc);

}

else if(count>=filesizea-filesizea%1024 && count

{

for(int j=0; count>=filesizea-filesizea%1024 && count

{

buf_yua[j]=(byte)(bufa[j] & 0xFF);

count++;

}

fos.write(buf_yua);

}

}

while( (hasReadb=fileb.read(bufa) )>0 )

{

if(countb

{

for(int i=0;i

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

bufc[i]=(byte)(bufa[i] & 0xFF);

count++;

}

fos.write(bufc);

}

else if(count>=filesizea-filesizea%1024 && count

{

for(int j=0; count>=filesizea-filesizea%1024 && count

{

buf_yua[j]=(byte)(bufa[j] & 0xFF);

count++;

}

fos.write(buf_yua);

}

}

while( (hasReadb=fileb.read(bufa) )>0 )

{

if(countb

{

for(int i=0;i

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

for(int j=0; count>=filesizea-filesizea%1024 && count

{

buf_yua[j]=(byte)(bufa[j] & 0xFF);

count++;

}

fos.write(buf_yua);

}

}

while( (hasReadb=fileb.read(bufa) )>0 )

{

if(countb

{

for(int i=0;i

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

buf_yua[j]=(byte)(bufa[j] & 0xFF);

count++;

}

fos.write(buf_yua);

}

}

while( (hasReadb=fileb.read(bufa) )>0 )

{

if(countb

{

for(int i=0;i

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

for(int i=0;i

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

http://bufc[i]=(byte)(bufa[i] & 0xFF);

countb++;

}

fos.write(bufc);

}

else if(countb>=filesizeb-filesizeb%1024 && countb

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

for(int j=0; countb>=filesizeb-filesizeb%1024 && countb

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

{

buf_yub[j]=(byte)(bufa[j] & 0xFF);

countb++;

}

fos.write(buf_yub);

}

}

}

}

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