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:
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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();
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<filesizea-filesizea% 1024 )
{
for ( int i= 0 ;i<bufa.length && count<filesizea-filesizea% 1024 ;i++)
{
bufc[i]=( byte )(bufa[i] & 0xff );
count++;
}
fos.write(bufc);
}
else if (count>=filesizea-filesizea% 1024 && count<filesizea)
{
for ( int j= 0 ; count>=filesizea-filesizea% 1024 && count<filesizea ;j++)
{
buf_yua[j]=( byte )(bufa[j] & 0xff );
count++;
}
fos.write(buf_yua);
}
}
while ( (hasreadb=fileb.read(bufa) )> 0 )
{
if (countb<filesizeb-filesizeb% 1024 )
{
for ( int i= 0 ;i<bufa.length && countb<filesizeb-filesizeb% 1024 ;i++)
{
bufc[i]=( byte )(bufa[i] & 0xff );
countb++;
}
fos.write(bufc);
}
else if (countb>=filesizeb-filesizeb% 1024 && countb<filesizeb)
{
for ( int j= 0 ; countb>=filesizeb-filesizeb% 1024 && countb<filesizeb ;j++)
{
buf_yub[j]=( byte )(bufa[j] & 0xff );
countb++;
}
fos.write(buf_yub);
}
}
}
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/u013555975/article/details/50294047