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C程序里可以利用libxml2庫去解析xml文檔。利用libxml2可以很輕松的解析，生成xml文件。

比較好的教程如下：http://www.blogjava.net/wxb_nudt/archive/2007/11/18/161340.html

這里演示一個(gè)小例子，包含了遍歷節點(diǎn)，獲取節點(diǎn)屬性與值，以及獲取CDATA里面的內容。

測驗的xml文件：

<?xml version="1.0" encoding="utf-8"?>

<root name="test">

        <content>

                <pro id="moonApple"><![CDATA[<say>i still have lots to work on</say>]]></pro>

                <details>

                        <detail name="dancing">like it</detail>

                        <detail name="singing">poor , just listen</detail>

                        <detail name="laugh"/>

                        <detail name="eating"><![CDATA[<food>candy</food>]]></detail>

                </details>

        </content>

</root>

test.c文件：

#include<stdio.h>

#include<string.h>

#include<libxml/parser.h>

#include<libxml/tree.h>

int parse_xml_file(char *buf,int len){

        xmlDocPtr doc;

        xmlNodePtr root,node,detail;

        xmlChar *name,*value;

        doc=xmlParseMemory(buf,len);    //parse xml in memory

        if(doc==NULL){

                printf("doc == null\n");

                return -1;

        }

        root=xmlDocGetRootElement(doc);

        for(node=root->children;node;node=node->next){

                if(xmlStrcasecmp(node->name,BAD_CAST"content")==0)

                        break;

        }

        if(node==NULL){

                printf("no node = content\n");

                return -1;

        }

        for(node=node->children;node;node=node->next){

                if(xmlStrcasecmp(node->name,BAD_CAST"pro")==0){         //get pro node

                        name=xmlGetProp(node,BAD_CAST"id");    

                        value=xmlNodeGetContent(node);

                        printf("this is %s:\n%s\n",(char*)name,(char*)value);   //get value, CDATA is not parse and don't take into value

                        xmlFree(name);

                        xmlFree(value);

                }else if(xmlStrcasecmp(node->name,BAD_CAST"details")==0){       //get details node

                        for(detail=node->children;detail;detail=detail->next){  //traverse detail node

                                if(xmlStrcasecmp(detail->name,BAD_CAST"detail")==0){

                                        name=xmlGetProp(detail,BAD_CAST"name");

                                        value=xmlNodeGetContent(detail);

                                        if(strlen((char*)value)!=0){

                                                printf("%s : %s\n",(char*)name,(char*)value);                                      

                                         }else{

                                                printf("%s has no value\n",(char*)name);

                                        }

                                        xmlFree(name);

                                        xmlFree(value);

                                }

                        }

                }

        }

        xmlFreeDoc(doc);

        return 0;

}

int main(void){

        char *content;

        unsigned long filesize;

        FILE *file;

        if((file=fopen("testxml","r"))==NULL){

                perror("openf file error");

        }

        fseek(file,0,SEEK_END);

        filesize=ftell(file);

        rewind(file);

        content=(char *)malloc(filesize+1);

        memset(content,0,filesize+1);

        fread(content,1,filesize,file);

        fclose(file);

        printf("content:\n%s\n",content);

        if(parse_xml_file(content,filesize)<0){

                perror("parse xml failed");

        }

        return 0;

}

輸出結果：

this is moonApple:

<say>i still have lots to work on</say>

dancing : like it

singing : poor , just listen

laugh has no value

eating : <food>candy</food>

這里主要關(guān)注XML文件里面的CDATA里面的內容~

更具體的使用方法和其他細節可以訪(fǎng)問(wèn)官網(wǎng)和上面的連接~