ubuntu环境下libxml2的测试

    一、创建一个xml文件

   

#include <stdio.h>#include "libxml/parser.h"#include "libxml/tree.h"int main(){    xmlDocPtr doc = NULL;    xmlNodePtr root_node = NULL,node = NULL,node1 = NULL;    doc = xmlNewDoc(BAD_CAST "1.0");    root_node = xmlNewNode(NULL,BAD_CAST "root");    xmlDocSetRootElement(doc,root_node);    xmlNewChild(root_node,NULL,BAD_CAST "node1",BAD_CAST "content 中文");    node = xmlNewChild(root_node,NULL,BAD_CAST "node2",BAD_CAST "has s");    xmlNewProp(node,BAD_CAST "attribute",BAD_CAST "yes");    node = xmlNewNode(NULL,BAD_CAST "node3");    node1 = xmlNewText(BAD_CAST "other way to create content");    xmlAddChild(node,node1);    xmlAddChild(root_node,node);    xmlSaveFormatFileEnc("-",doc,"UTF-8",1);    int ret = xmlSaveFile("xmltest.xml",doc);    if(ret != -1) printf("successful\n");    xmlFreeDoc(doc);    //xmlCleanupParser();    //xmlMemoryDump();        return 0;}

    二、查找节点与解析

  

#include <stdio.h>#include "libxml/parser.h"#include "libxml/xpath.h"void getNodeset(xmlDocPtr doc,const xmlChar* path){        xmlXPathContextPtr context;        xmlXPathObjectPtr  result;        context = xmlXPathNewContext(doc);        if(context == NULL)        {                fprintf(stderr,"context error\n");                return NULL;        }        result = xmlXPathEvalExpression(path,context);        xmlXPathFreeContext(context);        if(result == NULL)        {                fprintf(stderr,"expression error\n");                return NULL;        }        if(xmlXPathNodeSetIsEmpty(result->nodesetval))        {                xmlXPathFreeObject(result);                fprintf(stderr,"empty result\n");                return NULL;        }        xmlNodeSetPtr nodeset = result->nodesetval;        xmlChar* key;        int i;        for(i = 0;i < nodeset->nodeNr;i++)        {                key = xmlNodeListGetString(doc,nodeset->nodeTab[i]->xmlChildrenNode,1);                printf("keyword:%s\n",key);                xmlFree(key);        }        xmlXPathFreeObject(result);        return;}int main(int argc,char** argv){    xmlDocPtr doc;    xmlNodePtr node;    xmlChar* key;    char* docname;    if(argc <=1 )    {        printf("usage: %s docname\n",argv[0]);        return -1;    }    docname = argv[1];    doc = xmlReadFile(docname,"gb2312",XML_PARSE_RECOVER);    if(doc == NULL)    {        fprintf(stderr,"document parser false\n");        return -1;    }        getNodeset(doc,"/root/node1");    node = xmlDocGetRootElement(doc);    if(node == NULL)    {        fprintf(stderr,"empty document\n");        xmlFreeDoc(doc);        return -1;    }    if(xmlStrcmp(node->name,BAD_CAST"root"))    {        fprintf(stderr,"wrong type,root");        xmlFreeDoc(doc);        return -1;    }    node = node->xmlChildrenNode;    xmlNodePtr nodeptr = node;    while(node != NULL)    {        if(!xmlStrcmp(node->name,BAD_CAST"node1"))        {            key = xmlNodeGetContent(node);            printf("node:%s\n",key);            xmlFree(key);        }                 if(xmlHasProp(node,BAD_CAST"attribute"))        {            nodeptr = node;        }        node = node->next;    }    xmlAttrPtr attrptr = nodeptr->properties;    while(attrptr != NULL)    {        if(!xmlStrcmp(attrptr->name,BAD_CAST"attribute"))        {            xmlChar* attr = xmlGetProp(nodeptr,BAD_CAST"attribute");            printf("attribure:%s\n",attr);            xmlFree(attr);        }        attrptr = attrptr->next;    }    xmlFreeDoc(doc);    return 0;}

      三、makefile

 

INCDIR = -I/usr/include/libxml2LIBDIR= -L/usr/lib/i386-linux-gnuLIBSO = -lxml2CFLAG = -Wall -gall:xml xmlpaserxml:xmlcreate.o        gcc ${CFLAG} -o $@ $< ${LIBDIR} ${LIBSO}xmlcreate.o:xmlcreate.c         gcc -c -o $@ $^ ${INCDIR}xmlpaser:xmlpaser.o        gcc ${CFLAG} -o $@ $< ${LIBDIR} ${LIBSO}xmlpaser.o:xmlpaser.c         gcc -c -o $@ $^ ${INCDIR}clear:        rm -f *.o