xml的创建和解析

   xmlDocPtr doc = xmlNewDoc(BAD_CAST"1.0");xmlNodePtr root_node = xmlNewNode(NULL,BAD_CAST"root");//设置根节点xmlDocSetRootElement(doc,root_node);//在根节点中直接创建节点//  xmlNewTextChild(root_node, NULL, BAD_CAST "newNode1", BAD_CAST "newNode1 content");//xmlNewTextChild(root_node, NULL, BAD_CAST "newNode2", BAD_CAST "newNode2 content");//    xmlNewTextChild(root_node, NULL, BAD_CAST "newNode3", BAD_CAST "newNode3 content");//创建一个节点，设置其内容和属性，然后加入根结点//    xmlNodePtr node = xmlNewNode(NULL,BAD_CAST"node2");//  xmlNodePtr content = xmlNewText(BAD_CAST"NODE CONTENT");//    xmlAddChild(root_node,node);//  xmlAddChild(node,content);//  xmlNewProp(node,BAD_CAST"attribute",BAD_CAST "yes");//创建一个儿子和孙子节点xmlNodePtr node = xmlNewNode(NULL, BAD_CAST "son1");xmlAddChild(root_node,node);xmlNodePtr grandson = xmlNewNode(NULL, BAD_CAST "om_alarm_id");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "3"));grandson = xmlNewNode(NULL, BAD_CAST "alarm_position");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "E:\\project\\test"));grandson = xmlNewNode(NULL, BAD_CAST "alarm_type");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "5"));node = xmlNewNode(NULL, BAD_CAST "son2");xmlAddChild(root_node,node);grandson = xmlNewNode(NULL, BAD_CAST "om_alarm_id");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "4"));grandson = xmlNewNode(NULL, BAD_CAST "alarm_position");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "E:\\project\\test\\libxml"));grandson = xmlNewNode(NULL, BAD_CAST "alarm_type");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "6"));node = xmlNewNode(NULL, BAD_CAST "son3");xmlAddChild(root_node,node);grandson = xmlNewNode(NULL, BAD_CAST "om_alarm_id");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "5"));grandson = xmlNewNode(NULL, BAD_CAST "alarm_position");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "E:\\project\\test\\mcfddfa"));grandson = xmlNewNode(NULL, BAD_CAST "alarm_type");xmlAddChild(node,grandson);xmlAddChild(grandson, xmlNewText(BAD_CAST "1"));//存储xml文档int nRel = xmlSaveFile("CreatedXml.xml",doc);if (nRel != -1){// MessageBox("一个xml文档被创建,写入个字节");}//释放文档内节点动态申请的内存xmlFreeDoc(doc);

解析

xmlDocPtr doc;           //定义解析文档指针xmlNodePtr curNode;      //定义结点指针(你需要它为了在各个结点间移动)xmlChar *szKey;          //临时字符串变量char *szDocName;char error[256]="";szDocName = "./CreatedXml.xml";doc = xmlReadFile(szDocName,"UTF-8",XML_PARSE_RECOVER); //解析文件//检查解析文档是否成功，如果不成功，libxml将指一个注册的错误并停止。//一个常见错误是不适当的编码。XML标准文档除了用UTF-8或UTF-16外还可用其它编码保存。//如果文档是这样，libxml将自动地为你转换到UTF-8。更多关于XML编码信息包含在XML标准中.if (NULL == doc){  MessageBox("error");}curNode = xmlDocGetRootElement(doc); //确定文档根元素if (NULL == curNode){MessageBox("error");xmlFreeDoc(doc);}if (xmlStrcmp(curNode->name, BAD_CAST "root")){MessageBox("error");xmlFreeDoc(doc);}curNode = curNode->xmlChildrenNode;xmlNodePtr propNodePtr;while(curNode != NULL){//取出节点中的内容memset(&alarm_reg,0x00,sizeof(alarm_reg));propNodePtr = curNode->xmlChildrenNode;if ((!xmlStrcmp(curNode->name, (const xmlChar *)"son"))){while(propNodePtr!=NULL){if((!xmlStrcmp(propNodePtr->name,(const xmlChar *)"om_alarm_id"))){szKey = xmlNodeGetContent(propNodePtr);//	sprintf(alarm_reg.alarm_id,"%s",(char*)szKey);sscanf((char*)szKey,"%s",alarm_reg.alarm_id);sprintf(error,"%s",alarm_reg.alarm_id);WRITE_LOG(error,LOG_TYPE_INFO,LOG_LEVEL_RUN,true);xmlFree(szKey);}if((!xmlStrcmp(propNodePtr->name,(const xmlChar *)"alarm_position"))){szKey = xmlNodeGetContent(propNodePtr);sscanf((char*)szKey,"%s",alarm_reg.alarm_picpath);sprintf(error,"%s",alarm_reg.alarm_picpath);WRITE_LOG(error,LOG_TYPE_INFO,LOG_LEVEL_RUN,true);//WRITE_LOG((char*)szKey,LOG_TYPE_INFO,LOG_LEVEL_RUN,true);xmlFree(szKey);}if((!xmlStrcmp(propNodePtr->name,(const xmlChar *)"alarm_type"))){szKey = xmlNodeGetContent(propNodePtr);sscanf((char*)szKey,"%d",&alarm_reg.alarm_type);sprintf(error,"%d",alarm_reg.alarm_type);WRITE_LOG(error,LOG_TYPE_INFO,LOG_LEVEL_RUN,true);xmlFree(szKey);}propNodePtr=propNodePtr->next;}//szKey = xmlNodeGetContent(curNode);}//查找带有属性attribute的节点
/*if (xmlHasProp(curNode,BAD_CAST "attribute")){propNodePtr = curNode;}
*/curNode = curNode->next;}//查找属性/*   xmlAttrPtr attrPtr = propNodePtr->properties;while (attrPtr != NULL){if (!xmlStrcmp(attrPtr->name, BAD_CAST "attribute")){xmlChar* szAttr = xmlGetProp(propNodePtr,BAD_CAST "attribute");cout<<"get attribute = "<next;}
*/xmlFreeDoc(doc);

typedef struct DB_REG_ALARM_INFO_
{unsigned char alarm_id[64];unsigned int alarm_type; //报警类型unsigned char alarm_picpath[256];//报警图片的位置}DB_REG_ALARM_INFO,*DB_REG_ALARM_INFO_PTR;

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