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 = "<<szAttr<<endl;           xmlFree(szAttr);       }       attrPtr = attrPtr->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;