C语言 使用libxml解析 生成和解析xml
安装 libxml
libxml是一个用来解析XML文档的函数库。它用C语言写成，并且能为多种语言所调用
下载libxml
貌似libxml官方已经被河蟹掉了。没关系这里有
libxml的下载地址 2.7.4
下载之后解压
tar -zxvf libxml2-2.7.4.tar.gz
安装
- cd libxml2-2.7.4
- ./configure && make && make install
写测试代码
生成xml的代码
int main(int argc, char **argv)
{
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 of node1");
node=xmlNewChild(root_node, NULL, BAD_CAST "node3",BAD_CAST"node has attributes");
xmlNewProp(node, BAD_CAST "attribute", BAD_CAST "yes");
node = xmlNewNode(NULL, BAD_CAST "node4");
node1 = xmlNewText(BAD_CAST"other way to create content");
xmlAddChild(node, node1);
xmlAddChild(root_node, node);
xmlSaveFormatFileEnc(argc > 1 ? argv[1] : "-", doc, "UTF-8", 1);
xmlFreeDoc(doc);
xmlCleanupParser();
xmlMemoryDump();
return(0);
}
编译 ：
gcc -I /usr/local/include/libxml2 -L /usr/local/lib -lxml2 test.c -o test
执行
./test
解析xml
新建待解析xml, 文件内容:
<?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>
解析的c语言代码
#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);
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);
}
编译
gcc keyword.c -o keyword -I/usr/local/include/libxml2 -lxml2
运行
./keyword story.xml
参考博文
http://blog.csdn.net/z507263441/article/details/17742727
http://www.cnblogs.com/shanzhizi/archive/2012/07/09/2583739.html