tinyxml2使用

项目中遇到一个问题，C/C++需要与JAVA通信，JAVA方已经使用了XML序列化传输。本可以考虑JSON/GOOGLE PROTOCOL BUFFER的，但为了使JAVA方不做过多改动，坚持使用XML。

JAVA中可以将object与xml互转，但C/C++中没有找到类似开源项目，自己实现不太现实，只能一步一步对xml进行解析和生成了。

tinyxml2库使用非常简单，代码中引用tinyxml2.h，编译时加入tinyxml2.cpp即可；实例程序中有简单的xml解析例子。

以下对java中list/map（转xml）进行了解析：

#include <stdio.h>

#include "tinyxml2.h"

using namespace std;

using namespace tinyxml2;

        int

main ()

{

        static const char *xml =

                "<BusinessTask>"

                "<taskId>415042210020001</taskId>"

                "<controlSysId>hyb-product</controlSysId>"

                "<gwAccount>324345543543</gwAccount>"

                "<serviceKey>ba827bcfba932953</serviceKey>"

                "<type>54354675</type>"

                "<resourceNum></resourceNum>"

                "<participants>"

                "<TaskItem>"

                "<role>1</role>"

                "<participant>123124342432</participant>"

                "<startTime>0</startTime>"

                "<endTime>0</endTime>"

                "<isFinished>false</isFinished>"

                "</TaskItem>"

                "<TaskItem>"

                "<role>2</role>"

                "<participant>54675764656</participant>"

                "<startTime>0</startTime>"

                "<endTime>0</endTime>"

                "<isFinished>false</isFinished>"

                "</TaskItem>"

                "</participants>"

                "<propertyMap>"

                "<entry>"

                "<string>resourceNum</string>"

                "<string>423424424</string>"

                "</entry>"

                "<entry>"

                "<string>userId</string>"

                "<string>564657657567</string>"

                "</entry>"

                "<entry>"

                "<string>maxRetryTimes</string>"

                "<string>0</string>"

                "</entry>"

                "</propertyMap>"

                "<beginTime>1429668120</beginTime>"

                "<extParam></extParam>" "</BusinessTask>";

        /*

         * static const char* xml =

         * "<?xml version=\"1.0\"?>"

         * "<!DOCTYPE PLAY SYSTEM \"play.dtd\">"

         * "<PLAY>"

         * "<TITLE>A Midsummer Night's Dream</TITLE>"

         * "</PLAY>";

         * */

        XMLDocument doc;

        doc.Parse (xml);

        if (doc.ErrorID () != 0)

        {

                fprintf (stderr, "parse error");

                exit (1);

        }

        XMLElement *partElement =

                doc.FirstChildElement ("BusinessTask")->

                FirstChildElement ("participants");

        XMLElement *taskitemElement = partElement->FirstChildElement ("TaskItem");

        while (taskitemElement)

        {

                int role = -1;

                XMLElement *roleElement = taskitemElement->FirstChildElement ("role");

                roleElement->QueryIntText (&role);

                fprintf (stdout, "role=%d\n", role);

                taskitemElement = taskitemElement->NextSiblingElement ();

        }

        XMLElement *propertyMapElement =

                doc.FirstChildElement ("BusinessTask")->FirstChildElement ("propertyMap");

        XMLElement *entryElement = propertyMapElement->FirstChildElement ("entry");

        while (entryElement)

        {

                XMLElement *stringElement = entryElement->FirstChildElement ();

                printf ("%s\n", stringElement->GetText ());

                stringElement = stringElement->NextSiblingElement ();

                printf ("%s\n", stringElement->GetText ());

                entryElement = entryElement->NextSiblingElement ();

        }

        return 0;

}

以下是生成XML:

#include <stdio.h>

#include <string>

#include "tinyxml2.h"

using namespace std;

using namespace tinyxml2;

int main()

{

        //xml文档

        XMLDocument *pDoc = new XMLDocument();

        if (NULL==pDoc) {

                fprintf(stderr,"pDoc is null");

                exit(1);

        }

        XMLElement* BusinessTask = pDoc->NewElement("BusinessTask");

        pDoc->LinkEndChild(BusinessTask);

        XMLElement *taskIdElement = pDoc->NewElement("taskId");

        taskIdElement->LinkEndChild(pDoc->NewText("415042210020001"));//给节点设置值

        BusinessTask->LinkEndChild(taskIdElement);

        XMLElement *controlSysIdElement = pDoc->NewElement("controlSysId");

        controlSysIdElement->LinkEndChild(pDoc->NewText("415042210020001"));//给节点设置值

        BusinessTask->LinkEndChild(controlSysIdElement);

        XMLElement *typeElement = pDoc->NewElement("type");

        typeElement->LinkEndChild(pDoc->NewText("68720525312"));//给节点设置值

        BusinessTask->LinkEndChild(typeElement);

        XMLElement *participantsElemet = pDoc->NewElement("participants");

        BusinessTask->LinkEndChild(participantsElemet);

        int i=0;

        for(i;i<3;i++)

        {

                XMLElement *TaskItemElemet = pDoc->NewElement("TaskItem");

                participantsElemet->LinkEndChild(TaskItemElemet);

                //role

                XMLElement *roleElement = pDoc->NewElement("role");

                roleElement->LinkEndChild(pDoc->NewText("1"));

                TaskItemElemet->LinkEndChild(roleElement);

                //participant

                XMLElement *participantElement = pDoc->NewElement("participant");

                participantElement->LinkEndChild(pDoc->NewText("13996130360"));

                TaskItemElemet->LinkEndChild(participantElement);

        }

        //propertyMap

        XMLElement *propertyMapElemet = pDoc->NewElement("propertyMap");

        BusinessTask->LinkEndChild(propertyMapElemet);

        for(i=0;i<3;i++)

        {

                XMLElement *entryElemet = pDoc->NewElement("entry");

                propertyMapElemet->LinkEndChild(entryElemet);

                //key

                XMLElement *keyElement = pDoc->NewElement("string");

                keyElement->LinkEndChild(pDoc->NewText("resourceNum"));

                entryElemet->LinkEndChild(keyElement);

                //value

                XMLElement *valueElement = pDoc->NewElement("string");

                valueElement->LinkEndChild(pDoc->NewText("13996130361"));

                entryElemet->LinkEndChild(valueElement);

        }

        /*

           XMLPrinter printer;

           pDoc->Accept(&printer);

           char body[8192]={0x00};

           int len = strlen(printer.CStr());

           memcpy(body,printer.CStr(),8192);

           printf("len=%d\n%s\n",len,body);*/

        pDoc->Print();//打印

        delete pDoc;

}

输出如下

415042210020001

415042210020001

68720525312

1

13996130361

resourceNum

13996130361

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