读取XML文件使用QxmlStreamReader

Z时代
2024-01-10
分类：问答

嵌套的标签下面

我试图读取一个标签嵌套的xml文件，是我的xml文件读取XML文件使用QxmlStreamReader

<?xml version="1.0" encoding="UTF-8" ?> 
<root> 
<Header> 
<Hvers>1.0.0.0</Hvers> 
<SvVers>3.1.0.0</SvVers> 
<CID>d3911</CstID> 
<CrID>d3911</CarID> 
<DevID>cdp1</DevID> 
<SrvNm>VrsService</SrvNm> 
<Date>170516</Date> 
<Time>134838</Time> 
<PrjInf>none</PrjInf> 
    </Header> 
<Body> 
<TBA> 
    <tbaData uri="[email protected]"> 
    <unit2 version="1" release="0" update="0" evolution="0" > 
     <unit_type>DCY 1550A</unit_type> 
     <article_number>3EST000225-5711</article_number> 
     <production_date>2013-11-27</production_date> 
     <delivery_revision>06A</delivery_revision> 
     <present_revision>06A</present_revision> 
     <rev_date>2013-11-27</rev_date> 
     <made_the_last_rev>B21</made_the_last_rev> 
     <serial_number>B21-13464250019</serial_number> 
     <eth_addresses> 
     <eth_address>00:06:30:03:2D:A2</eth_address> 
     <eth_address>00:06:30:03:EE:02</eth_address> 
     </eth_addresses> 
     <boards> 
     <board> 
      <board_type>DTBB 411F</board_type> 
      <article_number>3EST000218-1223</article_number> 
      <production_date>2013-11-27</production_date> 
      <delivery_revision>03A</delivery_revision> 
      <present_revision>03A</present_revision> 
      <rev_date>2013-11-27</rev_date> 
      <made_the_last_rev>B21</made_the_last_rev> 
      <serial_number>B21-13445430010</serial_number> 
     </board> 
     <board> 
      <board_type>DTPC 401B</board_type> 
      <article_number>3EST000212-2418</article_number> 
      <production_date>2013-11-20</production_date> 
      <delivery_revision>05A</delivery_revision> 
      <present_revision>05A</present_revision> 
      <rev_date>2013-11-20</rev_date> 
      <made_the_last_rev>B21</made_the_last_rev> 
      <serial_number>B21-13459400179</serial_number> 
      <eth_addresses> 
      <eth_address>00:06:30:03:2D:A2</eth_address> 
      </eth_addresses> 
     </board> 
     <board> 
      <board_type>DTMB 403A</board_type> 
      <article_number>3EST000218-1237</article_number> 
      <production_date>2013-11-09</production_date> 
      <delivery_revision>02A</delivery_revision> 
      <present_revision>02A</present_revision> 
      <rev_date>2013-11-09</rev_date> 
      <made_the_last_rev>B21</made_the_last_rev> 
      <serial_number>B21-13447030057</serial_number> 
      <eth_addresses> 
      <eth_address>00:06:30:03:EE:02</eth_address> 
      </eth_addresses> 
     </board> 
     </boards> 
    </unit2> 
    </tbaData> 
    <tbaData uri="[email protected]"> 
    <system><component><type>Application</type><name>SCINumErr</name> <version>0.0.0.0</version><created>0</created></component></system> 
    </tbaData> 
</TBA> 
</Body> 
</root>

我中通过管理来读取标签，但错过了结构化的方式来阅读并填补我的结构。

我正在读取下面的xml文件，它将返回所有标记，而不是我想通过1个标记循环，然后开始下一个，例如，我想读取标记标题并保存在结构中，然后通过body等循环在下面的代码时，头开始，当身体等

void test::readXml() 
{ 
    QFile file("C:/VRC_Collector/VRS_Collector/deploy/all/conf/dpa/VRS_Collector/vrsdata.xml"); 
    if(!file.open(QIODevice::ReadOnly | QFile::Text)){ 
     qDebug()<<"File Openning Error"<< file.errorString(); 
    } 
    QXmlStreamReader reader(&file); 
    reader.readNext(); 
    while(!reader.atEnd()){ 
     // reader.readNextStartElement(); 
     qDebug()<< "root1" << reader.name(); 
     if(reader.readNextStartElement()){ 
      if(reader.name() == "root") 
      { 
       qDebug()<< "root"; 
       reader.readNext(); 
      }else if(reader.name() == "Header") { 
       qDebug()<< "header"; 
       reader.readNext(); 
      } 
      else if(reader.name() == "Body") { 
       qDebug()<< "Body"; 
       reader.readNext(); 
      }else if(reader.name() == "tbaData") { 
       qDebug()<< "tbaData"; 
       reader.readNext(); 
      } else { 
       qDebug()<< "else"; 
       reader.readNext(); 
      } 
     } 
    } 
}

我希望我是清楚我的问题，我还没有把结构中的代码填写现在，只用了qDebug我不明白（）。

PS上面的代码永远不会在“身体”和“tbaData”

回答：

最后我设法通过标签的XML标记解析，下面是代码片段：

QXmlStreamReader reader; 
QFile file("C:/data.xml"); 
if(!file.open(QIODevice::ReadOnly | QFile::Text)){ 
    qDebug()<<"File Openning Error"<< file.errorString(); 
} 
reader.setDevice(&file); 
if(reader.readNextStartElement()) { 
    if(reader.name() == "root"){ 
     qDebug()<<"Root"; 
     while(reader.readNextStartElement()){ 
      if(reader.name() == "Header"){ 
       qDebug()<< "Header" << reader.name().toString(); 
       while(reader.readNextStartElement()){ 
        if(reader.name() == "DevID") { 
         qDebug()<< "DevID" << reader.readElementText(); 
        } else { 
         reader.skipCurrentElement(); 
        } 
        //qDebug()<< "Header Elements" << reader.name(); 
       } 
      } 
      while(reader.readNextStartElement()) { 
       if(reader.name() == "Body") { 
        while(reader.readNextStartElement()) { 
         if(reader.name() == "TBA") { 
          while(reader.readNextStartElement()) { 
           if(reader.name() == "tbaData") { 
            qDebug()<< "unit_type" << reader.name(); 
            while(reader.readNextStartElement()){ 
             qDebug()<< "unit_type #1" << reader.name(); 
             if(reader.name() == "unit2"){ 
              while(reader.readNextStartElement()) { 
               if(reader.name() == "unit_type"){ 
                qDebug()<< "unit_type" << reader.readElementText(); 
               } else { 
                reader.skipCurrentElement(); 
               } 
              } 
             } 
             qDebug()<< "Check 1" << reader.name(); 
             reader.skipCurrentElement(); 
             while(reader.readNextStartElement()) { 
              if(reader.name() == "tbaData") { 
               while(reader.readNextStartElement()) { 
                if(reader.name() == "system") { 
                 while(reader.readNextStartElement()) { 
                  reader.skipCurrentElement(); 
                 } 
                } else { 
                 reader.skipCurrentElement(); 
                } 
               } 
               while(reader.readNextStartElement()) { 
                if(reader.name() == "system2") { 
                 while(reader.readNextStartElement()) { 
                  if(reader.name() == "name") { 
                  qDebug()<< "system2 " << reader.name(); 
                  } else { 
                   reader.skipCurrentElement(); 
                  } 
                  while(reader.readNextStartElement()) { 
                   if(reader.name() == "edPackage") { 
                    while(reader.readNextStartElement()) { 
                     if(reader.name() == "name") { 
                      qDebug()<< "reader ss" << reader.name(); 
                     } else { 
                      reader.skipCurrentElement(); 
                     } 
                    } 
                   } else { 
                    if(reader.name() == "sci") { 
                     while(reader.readNextStartElement()) { 
                      if(reader.name() == "name") { 
                       while(reader.readNextStartElement()) { 
                       qDebug()<< "sci name" << reader.name(); 
                       } 
                      } else { 
                       if(reader.name() == "component") { 
                        while(reader.readNextStartElement()) { 
                         qDebug()<< "sci name 1" << reader.name(); 
                        } 
                       } 
                       reader.skipCurrentElement(); 
                      } 
                     } 
                    } 
                    qDebug()<< "reader ss1" << reader.name(); 
                    reader.skipCurrentElement(); 
                   } 
                  } 
                 } 
                } 
               } 
               reader.skipCurrentElement(); 
               // qDebug()<< "Check 2" << reader.name(); 
              } 
             } 
             reader.readNextStartElement(); 
            } 
           } 
          } 
         } 
        } 
       } 
      } 
     } 
    } 
}