libxml2實現(xiàn)xml文檔的節(jié)點的修改

/********************************************************************** 

  Copyright, 2011, **** Tech. Co., Ltd. 

    All Rights Reserved 

----------------------------------------------------------------------- 

Project Code : wlan 

File name : modify_node.cpp 

Author  : Sky_qing 

Description : 使用libxml2修改xml文檔的節(jié)點

Function List: 

----------------------------------------------------------------------- 

History: 

Date  Author   Modification 

2011-12-27 Sky_qing  created file

**********************************************************************/
#include 
#include "libxml/parser.h"
#include "libxml/tree.h"

int main(int argc, char* argv[])
{
	xmlDocPtr doc;				//定義解析文檔指針
	xmlNodePtr curNode;			//定義節(jié)點指針（在各個節(jié)點之間移動）
	char* szDocName = argv[1];	//保存xml文檔名,該文檔名在運行程序到時候輸入。
	//例如：編譯格式為g++ modify_node.cpp -o modify_node -I /usr/local/include/libxml2/ -L /usr/local/lib -lxml2，生成可執(zhí)行文件modify_node，運行時：./modify_node log4crc（此處log4crc為要修改的xml文檔）

	printf("........start........\n");
 doc = xmlReadFile(szDocName, "utf-8", XML_PARSE_RECOVER); 	//解析文檔
	if (NULL == doc)
	{
		fprintf(stderr, "Document not parsed successfully.\n");
		
		return -1;
	}

	curNode = xmlDocGetRootElement(doc);		//確定文檔根元素
	if (NULL == curNode)
	{
		fprintf(stderr, "Empty Document.\n");
		xmlFreeDoc(doc);		//釋放文件

		return -1;
	}

	if (xmlStrcmp(curNode->name, (const xmlChar*)"log4c"))	//確認根元素是否為“l(fā)og4c”
	{
		fprintf(stderr, "Document of wrong type. root node != log4c");
		xmlFreeDoc(doc);

		return -1;
	}

	curNode = curNode->xmlChildrenNode;
	xmlNodePtr propNode = curNode;
	while (NULL != curNode)		//遍歷所有節(jié)點
	{
		//獲取名稱為category的節(jié)點
		if (!xmlStrcmp(curNode->name, (const xmlChar*)"category"))
		{
			//查找?guī)в袑傩詎ame的節(jié)點
 		if (xmlHasProp(curNode, BAD_CAST "name"))
 		{
  propNode = curNode;
 		}

			//查找屬性name為WLAN_Console的節(jié)點
 		xmlAttrPtr attrPtr = propNode->properties;
			while (NULL != attrPtr)		//遍歷所有名稱為category的節(jié)點
 		{
		 		if (!xmlStrcmp(attrPtr->name, (const xmlChar*)"name"))	//找到有name屬性到節(jié)點
		 		{
					//查找屬性為name的值的節(jié)點
					xmlChar* szPropity = xmlGetProp(propNode, (const xmlChar*)"name");
					if (!xmlStrcmp((const xmlChar*)szPropity, (const xmlChar*)"WLAN_Console"))
					{
						xmlAttrPtr setAttrPtr = propNode->properties;
						while (NULL != setAttrPtr)
						{
							//設(shè)置屬性priority的值
							xmlSetProp(propNode, (const xmlChar*)"priority", (const xmlChar*)"debug");
			
							setAttrPtr = setAttrPtr->next;
						}
					}
		 		}
		 		attrPtr = attrPtr->next;
	 		}	
		}
		curNode = curNode->next;
	}
	
	//保存文檔到原文檔中
	xmlSaveFile("log4crc", doc);

	printf("...........OK............\n");

	return 0;
}