linux 快速合并文本文件 Linux-Linux中高效合并文本文件的方法

可以用c去解决

#include

#include

#include

#include

#include

#define SUCCESS 1

#define READ_BUFF 8192

int main(int argc,char** argv)

{

printf("--- file combine Programme ---n");

if(NULL==argv[2])

{

printf("Input param error! exit...nPls use ./main data_folder outputCombinedFileNamen");

exit(0);

}

char *filePrefix = new char[256];

char *fileListBuf = new char[READ_BUFF];

DIR *dirp;

struct dirent* dp;

char *str = new char[256];

long fileSize = 0L;

int nread = 0;

if((dirp=opendir(argv[1])) == NULL ) return -1;

else

{

while((dp = readdir(dirp))!= NULL)

{

FILE *fd;

FILE *outFile;

if(strcmp(dp-> d_name,".")==0||strcmp(dp->d_name,"..")==0)continue;

sprintf(str,"%s/%s",argv[1],dp->d_name);

if((fd=fopen(str,"r"))!=NULL)

{

printf("Combining %s now ...n",str);

fseek(fd,0,SEEK_END);

fileSize = ftell(fd);

rewind(fd);

outFile = fopen(argv[2],"a+");

if(NULL == outFile)

{

printf("open output file error!n");

}

while((nread=fread(fileListBuf,sizeof(char),READ_BUFF,fd))>0)

{

fwrite(fileListBuf,sizeof(char),nread,outFile);

}

fclose(fd);

fclose(outFile);

}

}

}

closedir(dirp);

delete[] filePrefix;

delete[] fileListBuf;

delete[] str;

return SUCCESS;

}