opencv 读写XML YML

//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, NULL, 123);//写入的是序列，名称都为NULL
	cvWriteReal(file, NULL, 32.0);
	cvWriteString(file, NULL, "123123");
	
	int dbData[5] = {12, 3, 0, 5, 8};
	const string strType = "i";
	cvWriteRawData(file, dbData, 5, 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", mem, CV_STORAGE_READ | CV_STORAGE_WRITE);
	cvStartWriteStruct(file, "UserInfo", CV_NODE_MAP );

	cvWriteInt(file, "Integer", 123);//写入的是序列，名称都为NULL
	cvWriteReal(file, "Real", 32.0);
	cvWriteString(file, "String", "123123");

	cvWriteComment(file, "my comment", 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, "UserInfo", strlen("UserInfo"));
	CvFileNode *node1 = cvGetFileNode(file1, NULL, hashNode);
	if (node1 != NULL){//获取根节点名称
		printf("%s\n", cvGetFileNodeName(node1));
	}

	hashNode = cvGetHashedKey(file1, "Real", 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, "Integer", strlen("Integer"));
	CvFileNode *nodeInteger = cvGetFileNode(file1, node1, hashNode);
	if (nodeInteger != NULL){//获取子节点名称
		printf("%s\n", cvGetFileNodeName(nodeInteger));
		printf("%d\n", cvReadInt(nodeInteger));
	}

	hashNode = cvGetHashedKey(file1, "String", strlen("String"));
	CvFileNode *nodeString = cvGetFileNode(file1, node1, 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, node1, "Real"));//根据标签名获取值
	printf("%s\n", cvReadStringByName(file1, node1, "String"));
	printf("%d\n", cvReadIntByName(file1, node1, "Integer"));


	cvReleaseFileStorage(&file1);
	cvReleaseMemStorage(&mem1);

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