ZC：最下面有 ?.pro文件的设置写法
ZC: Win7x64，qt-opensource-windows-x86-msvc2010_opengl-5.3.2.exe，cn_visual_studio_2010_ultimate_x86_dvd_532347.iso
ZC: 需要和 编译出来的exe放在同一个目录的3个DLL为：iconv.dll、libxml2.dll、zlib1.dll （在下载的libXml2里面有这3个文件）（这一点需要注意 ! ! 不然编译出来的exe在Debug时会报错，而且 从报错的现象上看 也看不出是∵少了这3个DLL...很蛋疼）
1、
#include "mainwindow.h"
#include "ui_mainwindow.h" #include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include "iconv.h" #include <QDebug>
#include <QTextCodec> MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
} MainWindow::~MainWindow()
{
delete ui;
} void MainWindow::on_pbtnParseEncodeError_clicked()
{
// ZC: VS2010不管cpp文件的编码 将字符串常亮用Ansi编码，并且 xmlParseMemory默认使用UTF8编码操作，于是 就会报编码的错误。
// ZC: 可以看到 libXML2 的错误信息，是通过console打印出来的
char buf[] ="<?xml version=\"1.0\" encoding=\"UTF-8\"?> <JMSB> <HEAD> <CLJG>中过</CLJG> " \
"<JLTS>recordNo</JLTS>"\
"<CCXX></CCXX>"\
"</HEAD>"\
"</JMSB>";
xmlDocPtr doc = xmlParseMemory((char*)buf, strlen(buf) + );
xmlFreeDoc(doc);//xmlGenericError xmlSetGenericErrorFunc
} // ZC: 创建xml文档
void MainWindow::on_pbtnTest01_clicked()
{
xmlDocPtr doc = xmlNewDoc(BAD_CAST"1.0");
xmlNodePtr root_node = xmlNewNode(NULL,BAD_CAST"root"); //设置根节点
xmlDocSetRootElement(doc,root_node);
//在根节点中直接创建节点
xmlNewTextChild(root_node, NULL, BAD_CAST "newNode1", BAD_CAST "newNode1 content");
xmlNewTextChild(root_node, NULL, BAD_CAST "newNode2", BAD_CAST "newNode2 content");
xmlNewTextChild(root_node, NULL, BAD_CAST "newNode3", BAD_CAST "newNode3 content"); //创建一个节点，设置其内容和属性，然后加入根结点
xmlNodePtr node = xmlNewNode(NULL,BAD_CAST"node2");
xmlNodePtr content = xmlNewText(BAD_CAST"NODE CONTENT");
xmlAddChild(root_node,node);
xmlAddChild(node,content);
xmlNewProp(node,BAD_CAST"attribute",BAD_CAST "yes"); //创建一个儿子和孙子节点
node = xmlNewNode(NULL, BAD_CAST "son");
xmlAddChild(root_node,node);
xmlNodePtr grandson = xmlNewNode(NULL, BAD_CAST "grandson");
xmlAddChild(node,grandson);
xmlAddChild(grandson, xmlNewText(BAD_CAST "This is a grandson node")); //存储xml文档
int nRel = xmlSaveFile("CreatedXml.xml", doc);
if (nRel != -)
{
QTextCodec *codec = QTextCodec::codecForName("GBK");
//QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QString str01 = codec->toUnicode("一个xml文档被创建,写入");
QString str02 = codec->toUnicode("个字节");
qDebug() << str01 + QString::number(nRel) + str02;
//qDebug() << "一个xml文档被创建,写入" << nRel << "个字节";
} //释放文档内节点动态申请的内存 xmlFreeDoc(doc);
} // ZC: 解析xml文档
void MainWindow::on_pbtnParserXML_clicked()
{
xmlDocPtr doc; //定义解析文档指针
xmlNodePtr curNode; //定义结点指针(你需要它为了在各个结点间移动)
xmlChar *szKey; //临时字符串变量 char *szDocName = "CreatedXml.xml";
doc = xmlReadFile(szDocName, "GB2312", XML_PARSE_RECOVER); //解析文件 //检查解析文档是否成功，如果不成功，libxml将指一个注册的错误并停止。
//一个常见错误是不适当的编码。XML标准文档除了用UTF-8或UTF-16外还可用其它编码保存。
//如果文档是这样，libxml将自动地为你转换到UTF-8。更多关于XML编码信息包含在XML标准中. if (NULL == doc)
{
qDebug() << "Document not parsed successfully.";
return;
} curNode = xmlDocGetRootElement(doc); //确定文档根元素 /*检查确认当前文档中包含内容*/
if (NULL == curNode)
{
qDebug() << "Empty document";
xmlFreeDoc(doc);
return;
} /*在这个例子中，我们需要确认文档是正确的类型。“root”是在这个示例中使用文档的根类型。*/
if (xmlStrcmp(curNode->name, BAD_CAST "root"))
{
qDebug() << "document of the wrong type, root node != root";
xmlFreeDoc(doc);
return;
} curNode = curNode->xmlChildrenNode;
xmlNodePtr propNodePtr = curNode;
while(curNode != NULL)
{
//取出节点中的内容
if ((!xmlStrcmp(curNode->name, (const xmlChar *)"newNode1")))
{
szKey = xmlNodeGetContent(curNode);
qDebug() << "newNode1: " << szKey;
xmlFree(szKey);
} //查找带有属性attribute的节点
if (xmlHasProp(curNode,BAD_CAST "attribute"))
{
propNodePtr = curNode;
} curNode = curNode->next;
} //查找属性
xmlAttrPtr attrPtr = propNodePtr->properties;
while (attrPtr != NULL)
{
if (!xmlStrcmp(attrPtr->name, BAD_CAST "attribute"))
{
xmlChar* szAttr = xmlGetProp(propNodePtr,BAD_CAST "attribute");
qDebug() << "get attribute = " << szAttr;
xmlFree(szAttr);
}
attrPtr = attrPtr->next;
} xmlFreeDoc(doc);
} // ZC: 修改xml文档
void MainWindow::on_pbtnModifyXML_clicked()
{
xmlDocPtr doc; //定义解析文档指针
xmlNodePtr curNode; //定义结点指针(你需要它为了在各个结点间移动) char *szDocName = "CreatedXml.xml"; doc = xmlReadFile(szDocName, "GB2312", XML_PARSE_RECOVER); //解析文件 if (NULL == doc)
{
fprintf(stderr,"Document not parsed successfully. \n");
return;
} curNode = xmlDocGetRootElement(doc);
/*检查确认当前文档中包含内容*/
if (NULL == curNode)
{
fprintf(stderr,"empty document\n");
xmlFreeDoc(doc);
return;
} curNode = curNode->children;
while (NULL != curNode)
{
//删除newNode1
if (!xmlStrcmp(curNode->name, BAD_CAST "newNode1"))
{
xmlNodePtr tempNode;
tempNode = curNode->next;
xmlUnlinkNode(curNode); // ZC: 解除link
xmlFreeNode(curNode); // ZC: 释放内存
curNode = tempNode;
continue;
} //修改node2的属性值
if (!xmlStrcmp(curNode->name, BAD_CAST "node2"))
{
xmlSetProp(curNode,BAD_CAST "attribute", BAD_CAST "no");
}
//修改newNode2的内容
if (!xmlStrcmp(curNode->name, BAD_CAST "newNode2"))
{
xmlNodeSetContent(curNode, BAD_CAST "content changed");
} //增加一个属性
if (!xmlStrcmp(curNode->name, BAD_CAST "newNode3"))
{
xmlNewProp(curNode, BAD_CAST "newAttr", BAD_CAST "YES");
} //增加一个子节点
if (!xmlStrcmp(curNode->name, BAD_CAST "son"))
{
xmlNewTextChild(curNode, NULL, BAD_CAST "newGrandSon", BAD_CAST "new content");
} curNode = curNode->next;
} //存储xml文档
int nRel = xmlSaveFile("ChangedXml.xml",doc);
if (nRel != -)
{
QTextCodec *codec = QTextCodec::codecForName("GBK");
QString str01 = codec->toUnicode("一个xml文档被创建,写入");
QString str02 = codec->toUnicode("个字节"); qDebug() << str01 +QString::number(nRel) + str02;
}
xmlFreeDoc(doc);
} xmlXPathObjectPtr Get_NodeSet(xmlDocPtr doc, const xmlChar *szXpath)
{
xmlXPathContextPtr context; //XPATH上下文指针
xmlXPathObjectPtr result; //XPATH对象指针，用来存储查询结果 context = xmlXPathNewContext(doc); //创建一个XPath上下文指针
if (context == NULL)
{
printf("context is NULL\n");
return NULL;
} result = xmlXPathEvalExpression(szXpath, context); //查询XPath表达式，得到一个查询结果
xmlXPathFreeContext(context); //释放上下文指针
if (result == NULL)
{
printf("xmlXPathEvalExpression return NULL\n");
return NULL;
} if (xmlXPathNodeSetIsEmpty(result->nodesetval)) //检查查询结果是否为空
{
xmlXPathFreeObject(result);
printf("nodeset is empty\n");
return NULL;
} return result;
} void MainWindow::on_pbtnXPATH_clicked()
{
xmlDocPtr doc = NULL; //定义解析文档指针
xmlNodePtr curNode = NULL; //定义结点指针(你需要它为了在各个结点间移动) char *szDocName = "CreatedXml.xml"; doc = xmlReadFile(szDocName, "GB2312", XML_PARSE_RECOVER); //解析文件 if (NULL == doc)
{
fprintf(stderr,"Document not parsed successfully. \n");
return;
} xmlChar *szXpath =BAD_CAST ("/root/node2[@attribute='yes']");
xmlXPathObjectPtr app_result = Get_NodeSet(doc,szXpath); //查询并得到结果 if (NULL == app_result)
{
printf("app_result is NULL\n");
return;
}
xmlChar *szValue = NULL;
if(app_result)
{
xmlNodeSetPtr nodeset = app_result->nodesetval;
for (int i = ; i < nodeset->nodeNr; i++)
{
curNode = nodeset->nodeTab[i];
if(curNode != NULL)
{
szValue = xmlGetProp(curNode,BAD_CAST "attribute");
if (szValue != NULL)
{
printf("attribute = %s\n", szValue);
xmlFree(szValue);
} szValue = xmlNodeGetContent(curNode);
if (szValue != NULL)
{
printf("content = %s\n", szValue);
xmlFree(szValue);
}
}
}
xmlXPathFreeObject (app_result);
}
xmlFreeDoc(doc);
} //代码转换:从一种编码转为另一种编码
int code_convert(char* from_charset, char* to_charset, char* inbuf,
int inlen, char* outbuf, int outlen)
{
iconv_t cd;
char** pin = &inbuf;
char** pout = &outbuf; cd = iconv_open(to_charset,from_charset);
if(cd == )
return -;
memset(outbuf,,outlen);
if(iconv(cd,(const char**)pin,(unsigned int *)&inlen,pout,(unsigned int*)&outlen)
== -)
return -;
iconv_close(cd);
return ;
} //UNICODE码转为GB2312码
//成功则返回一个动态分配的char*变量，需要在使用完毕后手动free，失败返回NULL
char* u2g(char *inbuf)
{
int nOutLen = * strlen(inbuf) - ;
char* szOut = (char*)malloc(nOutLen); if (- == code_convert("utf-8","gb2312",inbuf,strlen(inbuf),szOut,nOutLen))
{
free(szOut);
szOut = NULL;
}
return szOut;
} //GB2312码转为UNICODE码
//成功则返回一个动态分配的char*变量，需要在使用完毕后手动free，失败返回NULL
char* g2u(char *inbuf)
{
int nOutLen = * strlen(inbuf) - ;
char* szOut = (char*)malloc(nOutLen); if (- == code_convert("gb2312","utf-8",inbuf,strlen(inbuf),szOut,nOutLen))
{
free(szOut);
szOut = NULL;
}
return szOut;
} void MainWindow::on_pbtnZhongWen_clicked()
{
//定义文档和节点指针
xmlDocPtr doc = xmlNewDoc(BAD_CAST"1.0");
xmlNodePtr root_node = xmlNewNode(NULL,BAD_CAST"root"); //设置根节点
xmlDocSetRootElement(doc,root_node); //一个中文字符串转换为UTF-8字符串，然后写入
char* szOut = g2u("节点1的内容"); //在根节点中直接创建节点
xmlNewTextChild(root_node, NULL, BAD_CAST "newNode1", BAD_CAST "newNode1 content");
xmlNewTextChild(root_node, NULL, BAD_CAST "newNode2", BAD_CAST "newNode2 content");
xmlNewTextChild(root_node, NULL, BAD_CAST "newNode3", BAD_CAST "newNode3 content"); xmlNewChild(root_node, NULL, BAD_CAST "node1",BAD_CAST szOut);
free(szOut); //创建一个节点，设置其内容和属性，然后加入根结点
xmlNodePtr node = xmlNewNode(NULL,BAD_CAST"node2");
xmlNodePtr content = xmlNewText(BAD_CAST"NODE CONTENT");
xmlAddChild(root_node,node);
xmlAddChild(node,content);
szOut = g2u("属性值");
xmlNewProp(node,BAD_CAST"attribute",BAD_CAST szOut);
free(szOut); //创建一个中文节点
szOut = g2u("中文节点");
xmlNewChild(root_node, NULL, BAD_CAST szOut,BAD_CAST "content of chinese node");
free(szOut); //存储xml文档
int nRel = xmlSaveFormatFileEnc("CreatedXml_cn.xml",doc,"GB2312",);
if (nRel != -)
{
QTextCodec *codec = QTextCodec::codecForName("GBK");
QString str01 = codec->toUnicode("一个xml文档被创建,写入");
QString str02 = codec->toUnicode("个字节"); qDebug() << str01 + QString::number(nRel) + str02;
} xmlFreeDoc(doc);
}
2、界面
3、"libxml2_z.pro" (公司的笔记本，"F:\ZZ_Qt5\Qt532_vs2010\libxml2_z")
4、
#-------------------------------------------------
#
# Project created by QtCreator 2016-12-21T15:02:53
#
#------------------------------------------------- QT += core gui greaterThan(QT_MAJOR_VERSION, 4): QT += widgets TARGET = libxml2_z
TEMPLATE = app SOURCES += main.cpp\
mainwindow.cpp HEADERS += mainwindow.h FORMS += mainwindow.ui INCLUDEPATH += F:\ZC_IDE\VC_3rd\libxml2\iconv-1.9.2.win32\include \
F:\ZC_IDE\VC_3rd\libxml2\libxml2-2.6.30.win32\include \
F:\ZC_IDE\VC_3rd\libxml2\zlib-1.2.3.win32\include LIBPATH += F:/ZC_IDE/VC_3rd/libxml2/iconv-1.9.2.win32/lib \
F:/ZC_IDE/VC_3rd/libxml2/libxml2-2.6.30.win32/lib \
F:/ZC_IDE/VC_3rd/libxml2/zlib-1.2.3.win32/lib LIBS += -liconv \
-llibxml2 \
-lzlib
#ZC: (1)设置libxml2的头文件目录 (2)设置libxml2的lib文件的目录 (3)指明lib文件 (4)将dll文件复制到exe所在目录(或system32)
5、
6、