libxml2 的一個簡單示例
阿新 • • 發佈：2019-02-14
xml檔案如下：
<?xml version="1.0"?> <story> <storyinfo> <author>John Fleck</author> <datewritten>June 2, 2002</datewritten> <keyword>example keyword</keyword> </storyinfo> <body> <headline>This is the headline</headline> <para>This is the body text.</para> </body> </story>
解析程式碼程式碼如下：
#include <stdio.h> #include <string.h> #include <stdlib.h> #include <libxml/xmlmemory.h> #include <libxml/parser.h> void parseStory (xmlDocPtr doc, xmlNodePtr cur) { xmlChar *key; cur = cur->xmlChildrenNode; while (cur != NULL) { if ((!xmlStrcmp(cur->name, (const xmlChar *)"keyword"))) { key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1); printf("keyword: %s\n", key); xmlFree(key); } cur = cur->next; } return; } static void parseDoc(char *docname) { xmlDocPtr doc; xmlNodePtr cur; doc = xmlParseFile(docname); if (doc == NULL ) { fprintf(stderr,"Document not parsed successfully. \n"); return; } cur = xmlDocGetRootElement(doc); if (cur == NULL) { fprintf(stderr,"empty document\n"); xmlFreeDoc(doc); return; } if (xmlStrcmp(cur->name, (const xmlChar *) "story")) { fprintf(stderr,"document of the wrong type, root node != story"); xmlFreeDoc(doc); return; } cur = cur->xmlChildrenNode; while (cur != NULL) { if ((!xmlStrcmp(cur->name, (const xmlChar *)"storyinfo"))){ parseStory (doc, cur); } cur = cur->next; } xmlFreeDoc(doc); return; } int main(int argc, char **argv) { char *docname; if (argc <= 1) { printf("Usage: %s docname\n", argv[0]); return(0); } docname = argv[1]; parseDoc (docname); return (1); }
編譯的Makefile如下：
test:example.c
gcc -Wall -o test example.c -I /usr/include/libxml2 -L /usr/lib -lxml2
clean:
rm test程式碼通過解析前面的story.xml檔案，然後打印出這麼一句話：
keyword: example keyword