C語言使用libxml解析生成和解析xml

時間 2019-11-10

標籤 c語言使用 libxml 解析生成 xml 欄目 XML 简体版

原文原文鏈接

##安裝 libxmlhtml

libxml是一個用來解析XML文檔的函數庫。它用C語言寫成，而且能爲多種語言所調用node

###下載libxml 貌似libxml官方已經被河蟹掉了。不要緊這裏有 libxml的下載地址 2.7.4函數

###下載以後解壓 tar -zxvf libxml2-2.7.4.tar.gz測試

安裝

cd libxml2-2.7.4
./configure && make && make install

##寫測試代碼.net

###生成xml的代碼unix

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);
}

編譯：

gcc -I /usr/local/include/libxml2  -L /usr/local/lib -lxml2 test.c -o test

執行

./test

解析xml

新建待解析xml, 文件內容:code

<?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語言代碼orm

#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);
}

###編譯 gcc keyword.c -o keyword -I/usr/local/include/libxml2 -lxml2xml

###運行 ./keyword story.xmlhtm

參考博文

http://blog.csdn.net/z507263441/article/details/17742727 http://www.cnblogs.com/shanzhizi/archive/2012/07/09/2583739.html