2.文件操作
[cpp] view plain copy #define MEM_ALLOC_SIZE 1024 int main(int argc, const char * const argv[]) { apr_pool_t * pool;//内存池 apr_status_t rv; char * buf; char * contentBuf; apr_file_t * fin; apr_file_t * fout; apr_size_t len; apr_finfo_t finfo;//用来保存文件信息的结构体 rv = apr_initialize();//初始化 rv = apr_pool_create(&pool,NULL);//创建pool buf = apr_palloc(pool,MEM_ALLOC_SIZE);//给buf分配空间 rv = apr_file_open(&fin,"d:\\in.txt",APR_READ|APR_BUFFERED,APR_OS_DEFAULT,pool);//打开可读文件 if( rv == APR_SUCCESS ){ strcpy(buf,"fileread_open succeed!"); printf("this is a test:%s\n",buf); } apr_file_lock(fin,APR_FLOCK_SHARED);//读锁,允许其他读者进线程对它读，但不能有写者对它操作 /* * 打开可写文件 * 其中APR_CREATE表示若没有该文件则创建一个，APR_TRUNCATE表示若文件有内容则全部删掉（APR_APPEND为在文件末添加） */ rv = apr_file_open(&fout,"d:\\out.txt",APR_WRITE|APR_BUFFERED|APR_CREATE|APR_TRUNCATE,APR_OS_DEFAULT,pool); if( rv == APR_SUCCESS ){ strcpy(buf,"filewrite_open succeed!"); printf("this is a test:%s\n",buf); } apr_file_lock(fout,APR_FLOCK_EXCLUSIVE);//写锁，不允许其他进程对此文件操作 /* * 将in.txt文件中的内容全部复制到out.txt文件中 */ contentBuf = apr_palloc(pool,MEM_ALLOC_SIZE); do{ apr_file_read(fin,contentBuf,&len); //contentBuf[len] = 0; apr_file_write(fout,contentBuf,&len); } while( len != 0 ); //关闭文件in.txt apr_file_unlock(fin); apr_file_close(fin); /* * 将复制in.txt为in_bak.txt，同时删掉in.txt文件 */ apr_file_copy("d:\\in.txt","d:\\in_bak.txt",APR_OS_DEFAULT,pool); apr_file_remove("d:\\in.txt",pool); apr_file_info_get(&finfo,APR_FINFO_NAME,fout);//获取文件信息方法1：通过文件对象 printf("file name is:%s",finfo.fname); apr_stat(&finfo,"d:\\in_bak.txt",APR_FINFO_SIZE,pool);//获取文件信息方法2：通过文件路径 printf("file size is:%d bytes",finfo.size); //关闭文件out.txt apr_file_unlock(fout); apr_file_close(fout); apr_pool_destroy(pool);//销掉内存池对象 apr_terminate();//结束 return APR_SUCCESS; }3 目录操作
[cpp] view plain copy #define MEM_ALLOC_SIZE 1024 void traversal(char * dirPath, apr_pool_t * pool) {//-r遍历该目录下的所有文件 apr_finfo_t finfo;//用来保存文件信息的结构体 apr_dir_t *dir; if( apr_dir_open(&dir,dirPath,pool) != APR_SUCCESS ) return;//获得目录对象，若不成功则直接返回 while(apr_dir_read(&finfo,APR_FINFO_NAME|APR_FINFO_TYPE,dir) == APR_SUCCESS ) {//读该目录下的所有文件信息，存到finfo中 if( finfo.filetype == APR_DIR ) {//该文件是目录对象 if( strcmp(finfo.name,".") == 0 || strcmp(finfo.name,"..") == 0 ) {//该文件是.或..，则继续 continue; }else {//该文件是目录，且不是.或..，则递归进入 char * subDirPath; subDirPath = apr_pstrcat(pool,dirPath,"\\",finfo.name,NULL);//subDirPath = dirPath + "\\" + finfo.name + NULL traversal(subDirPath,pool); } }else if( finfo.filetype == APR_REG ) {//文件是普通文件，输出 printf("%s\\%s\n",dirPath,finfo.name); }else { printf("非正常文件:%s\\%s\n",dirPath,finfo.name);//文件是非普通文件，输出 } } } int main(int argc, const char * const argv[]) { apr_pool_t * pool;//内存池 apr_status_t rv; rv = apr_initialize();//初始化 rv = apr_pool_create(&pool,NULL);//创建pool traversal("d:",pool);//开始遍历 apr_pool_destroy(pool);//销掉内存池对象 apr_terminate();//结束 return APR_SUCCESS; }4 自定义命令行参数
[cpp] view plain copy static const apr_getopt_option_t cmd_option[] = { {"in",'i',TRUE,"input filename"}, {"out",'o',TRUE,"output filename"}, {"help",'h',FALSE,"show help information"}, {NULL,0,0,NULL},//哨兵 }; #define MEM_ALLOC_SIZE 1024 int main(int argc, const char * const argv[]) { apr_pool_t * pool;//内存池 apr_status_t rv; apr_getopt_t * opt; int optch; char * optarg; rv = apr_initialize();//初始化 rv = apr_pool_create(&pool,NULL);//创建pool apr_getopt_init(&opt,pool,argc,argv);//将命令行内容填入opt结构中 while( (rv = apr_getopt_long(opt,cmd_option,&optch,&optarg)) == APR_SUCCESS ) {//一个一个解析命令 switch(optch) { case 'i': printf("i参数是%s",optarg); break; case 'o': printf("o参数是%s",optarg); break; case 'h': printf("h没有参数"); break; default: break; } } if( rv != APR_EOF ){//判断是否全部解析 printf("解析命令行错误！"); } apr_pool_destroy(pool);//销掉内存池对象 apr_terminate();//结束 return APR_SUCCESS; } 参考：http://hi.baidu.com/qteqpid_pku/item/c8e89813ad9b4d8988a95633http://blog.sina.com.cn/s/blog_625cce080100g1jp.html
