//序列没有标签 CvMemStorage *mem = cvCreateMemStorage(0); CvFileStorage *file = cvOpenFileStorage("e:\\123.yml",mem,CV_STORAGE_READ | CV_STORAGE_WRITE); cvStartWriteStruct(file,NULL,CV_NODE_SEQ ); cvWriteInt(file,123);//写入的是序列,名称都为NULL cvWriteReal(file,32.0); cvWriteString(file,"123123"); int dbData[5] = {12,3,5,8}; const string strType = "i"; cvWriteRawData(file,dbData,strType.c_str()); cvWriteComment(file,"my comment",0);//把注释写在该行的后面 CvFileNode *node = cvGetRootFileNode(file,0); if (node != NULL){ printf("%s\n",node->data.str.ptr); } cvEndWriteStruct(file); cvReleaseFileStorage(&file); cvReleaseMemStorage(&mem);
可以看出序列写文件没有节点
CvMemStorage *mem = cvCreateMemStorage(0); CvFileStorage *file = cvOpenFileStorage("e:\\123.xml","UserInfo",CV_NODE_MAP ); cvWriteInt(file,"Integer","Real","String","123123"); cvWriteComment(file,0);//把注释写在该行的后面 cvEndWriteStruct(file); cvReleaseFileStorage(&file); cvReleaseMemStorage(&mem);
如果是MAP,就可以了
代码如下
CvMemStorage *mem1 = cvCreateMemStorage(0); CvFileStorage *file1 = cvOpenFileStorage("e:\\123.xml",mem1,CV_STORAGE_READ); CvStringHashNode *hashNode = cvGetHashedKey(file1,strlen("UserInfo")); CvFileNode *node1 = cvGetFileNode(file1,hashNode); if (node1 != NULL){//获取根节点名称 printf("%s\n",cvGetFileNodeName(node1)); } hashNode = cvGetHashedKey(file1,strlen("Real")); CvFileNode *nodeReal = cvGetFileNode(file1,node1,hashNode); if (nodeReal != NULL){//获取子节点名称 printf("%s\n",cvGetFileNodeName(nodeReal)); printf("%d\n",cvReadInt(nodeReal)); } hashNode = cvGetHashedKey(file1,strlen("Integer")); CvFileNode *nodeInteger = cvGetFileNode(file1,hashNode); if (nodeInteger != NULL){//获取子节点名称 printf("%s\n",cvGetFileNodeName(nodeInteger)); printf("%d\n",cvReadInt(nodeInteger)); } hashNode = cvGetHashedKey(file1,strlen("String")); CvFileNode *nodeString = cvGetFileNode(file1,hashNode); if (nodeString != NULL){//获取子节点名称 printf("%s\n",cvGetFileNodeName(nodeString)); printf("%s\n",cvReadString(nodeString)); } printf("\n"); printf("%f\n",cvReadRealByName(file1,"Real"));//根据标签名获取值 printf("%s\n",cvReadStringByName(file1,"String")); printf("%d\n",cvReadIntByName(file1,"Integer")); cvReleaseFileStorage(&file1); cvReleaseMemStorage(&mem1);