java - 如何从选择路径或选择属性 ximpleware 中获取属性值

Question

 <ConfiguredItems>
    <OtapiConfiguredItem>
      <Id>3117283038955</Id>
      <Quantity>1693</Quantity>
      <Configurators>
        <ValuedConfigurator Pid="1627207" Vid="3232480" />
        <ValuedConfigurator Pid="20509" Vid="28314" />
      </Configurators>
    </OtapiConfiguredItem>
    <OtapiConfiguredItem>
      <Id>3117283038956</Id>
      <Quantity>1798</Quantity>
      <Configurators>
        <ValuedConfigurator Pid="1627207" Vid="3232480" />
        <ValuedConfigurator Pid="20509" Vid="6145171" />
      </Configurators>
</OtapiConfiguredItem>
    <OtapiConfiguredItem>
      <Id>3117283038957</Id>
      <Quantity>1815</Quantity>
        <Configurators>
          <ValuedConfigurator Pid="1627207" Vid="28331" />
          <ValuedConfigurator Pid="20509" Vid="28315" />
        </Configurators>
  </OtapiConfiguredItem>

以上是我的 XML .. 我需要为每个 OtapiConfiguredItem 获取 ValuedConfigurator PID 和 VID 属性值

我试过选择路径 vcPId.selectXPath("BatchItemFullInfoAnswer/Result/Item/ConfiguredItems/OtapiConfiguredItem/Configurators/ValuedConfigurator[@pid]");

提前致谢..

Answer 1

在 vtd-xml 中有很多方法可以做到这一点。我给你几个选项

第一个不使用 XPath 来获取属性，而是调用游标 api 的 getAttrVal 来这样做...

import com.ximpleware.*;
public class queryAttr {
    public static void main(String[] s) throws VTDException{
        VTDGen vg = new VTDGen();
        vg.selectLcDepth(5);// improve XPath performance for deep document
        if (!vg.parseFile("input.xml", false))
            return;
        VTDNav vn = vg.getNav();
        AutoPilot ap = new AutoPilot(vn);
        ap.selectXPath("/BatchItemFullInfoAnswer/Result/Item/ConfiguredItems/OtapiConfiguredItem/Configurators/ValuedConfigurator");
        int i=0,j=0;
        while((i=ap.evalXPath())!=-1){
            j= vn.getAttrVal("pid");
            if (j!=-1)
                System.out.println(" attr value for pid is ==>"+vn.toString(j));
            j= vn.getAttrVal("vid");
            if (j!=-1)
                System.out.println(" attr value for vid is ==>"+vn.toString(j));
        }
    }
}

第二个使用完整的 XPath，阅读代码中嵌入的注释

import com.ximpleware.*;
public class queryAttr {
    public static void main(String[] s) throws VTDException{
        VTDGen vg = new VTDGen();
        vg.selectLcDepth(5);// improve XPath performance for deep document
        if (!vg.parseFile("input.xml", false))
            return;
        VTDNav vn = vg.getNav();
        AutoPilot ap = new AutoPilot(vn);
        ap.selectXPath("/BatchItemFullInfoAnswer/Result/Item/ConfiguredItems/OtapiConfiguredItem/Configurators/ValuedConfigurator/@pid");
        AutoPilot ap2 = new AutoPilot(vn);
        ap2.selectXPath("../@vid");
        int i=0,j=0;
        while((i=ap.evalXPath())!=-1){
            System.out.println(" attr value for pid is ==>"+vn.toString(i+1)); // notice this is i+1, not i cuz i is the vtd record index for pid
            vn.push();// maintain consistency of autoPilot with push/pop combo
            if ((j=ap2.evalXPath())!=-1)
                System.out.println(" attr value for vid is ==>"+vn.toString(j+1)); // notice this is j+1, not j cuz j is the vtd record index for vid
            vn.pop();
        }
    }
}