解析器在android

Question

下面是我的xml格式。在那我需要提取數據在Group標籤下，這個組標籤是在common標籤下面的。在這個通用標籤中我們有4組，在那裏我需要4 group數據。但在我的xml中還有一些其他組標籤也存在，因此數據也被提取。但是我需要公共標籤內的組數據。

我的XML：

<root> 
<Budget>100000.0</Budget> 
<Procost> 
<Costid>1</Costid> 
<Costname>Fixed Cost</Costname> 
<Amount>70666.66</Amount> 
</Procost> 
<Procostcount>1</Procostcount> 
<Totalcost>70666.66</Totalcost> 
<Common> 
<Group> 
<Empid>370</Empid> 
<Reportid>-1</Reportid> 
<Empcost>0</Empcost> 
<Isanyreporting>Y</Isanyreporting> 
<Reportcount>9</Reportcount> 
<Reportname>NA</Reportname> 
<Name>Shalini</Name> 
<Desigid>0</Desigid> 
<Gender>female</Gender> 
<Yearexperience>11</Yearexperience> 
<Monthexperience>0</Monthexperience> 
<Phone>974113524</Phone> 
<Emailid>shalini@ohile.com</Emailid> 
<Projectid>1</Projectid> 
<Projectname>Sabre</Projectname> 
<Displaylevel>0</Displaylevel> 
<Photo>None</Photo> 
</Group> 
<Group> 
<Empid>381</Empid> 
<Reportid>370</Reportid> 
<Empcost>0</Empcost> 
<Reportcount>0</Reportcount> 
<Isanyreporting>No</Isanyreporting> 
<Reportname>Shalini</Reportname> 
<Name>Arun</Name> 
<Desigid>1</Desigid> 
<Gender>male</Gender> 
<Yearexperience>8</Yearexperience> 
<Monthexperience>0</Monthexperience> 
<Phone>2147483647</Phone> 
<Emailid>arun@ohile.com</Emailid> 
<Projectid>1</Projectid> 
<Projectname>Sabre</Projectname> 
<Displaylevel>0</Displaylevel> 
<Photo>None</Photo> 
</Group> 
<Group> 
<Empid>382</Empid> 
<Reportid>370</Reportid> 
<Empcost>0</Empcost> 
<Reportcount>0</Reportcount> 
<Isanyreporting>No</Isanyreporting> 
<Reportname>Shalini</Reportname> 
<Name>Manu</Name> 
<Desigid>1</Desigid> 
<Gender>male</Gender> 
<Yearexperience>8</Yearexperience> 
<Monthexperience>0</Monthexperience> 
<Phone>123487509</Phone> 
<Emailid>manu@ohile.com</Emailid> 
<Projectid>1</Projectid> 
<Projectname>Sabre</Projectname> 
<Displaylevel>0</Displaylevel> 
<Photo>None</Photo> 
</Group> 
<Group> 
<Empid>383</Empid> 
<Reportid>370</Reportid> 
<Empcost>0</Empcost> 
<Reportcount>0</Reportcount> 
<Isanyreporting>No</Isanyreporting> 
<Reportname>Shalini</Reportname> 
<Name>Ramakrishnan Nair</Name> 
<Desigid>1</Desigid> 
<Gender>male</Gender> 
<Yearexperience>8</Yearexperience> 
<Monthexperience>0</Monthexperience> 
<Phone>467983245</Phone> 
<Emailid>ramakrishnan@ohile.com</Emailid> 
<Projectid>1</Projectid> 
<Projectname>Sabre</Projectname> 
<Displaylevel>0</Displaylevel> 
<Photo>None</Photo> 
</Group> 
</Common> 
<Project> 
<Empid>371</Empid> 
<Reportid>370</Reportid> 
<Displaylevel>2</Displaylevel> 
<Empcost>35333.3</Empcost> 
<Name>Remya</Name> 
<Desigid>5</Desigid> 
<Gender>female</Gender> 
<Yearexperience>2</Yearexperience> 
<Monthexperience>0</Monthexperience> 
<Phone>975443452</Phone> 
<Emailid>remya@ohile.com</Emailid> 
<Projectid>1</Projectid> 
<Projectname>Sabre</Projectname> 
<Photo>None</Photo> 
<Reportcount>0</Reportcount> 
<Isanyreporting>No</Isanyreporting> 
<Reportname>Shalini</Reportname> 
</Project> 
<Project> 
<Empid>374</Empid> 
<Reportid>370</Reportid> 
<Displaylevel>2</Displaylevel> 
<Empcost>35333.3</Empcost> 
<Name>Nijo Susan Thomas</Name> 
<Desigid>5</Desigid> 
<Gender>female</Gender> 
<Yearexperience>1</Yearexperience> 
<Monthexperience>1</Monthexperience> 
<Phone>2147483647</Phone> 
<Emailid>nijo@ohile.com</Emailid> 
<Projectid>1</Projectid> 
<Projectname>Sabre</Projectname> 
<Photo>None</Photo> 
<Reportcount>0</Reportcount> 
<Isanyreporting>No</Isanyreporting> 
<Reportname>Shalini</Reportname> 
</Project> 
<Count>6</Count> 
<Procount>2</Procount> 
<Fieldnames> 
<Fieldnamecount>16</Fieldnamecount> 
<Group> 
<Fieldname>Name</Fieldname> 
</Group> 
<Group> 
<Fieldname>Empid</Fieldname> 
</Group> 
<Group> 
<Fieldname>Desigid</Fieldname> 
</Group> 
<Group> 
<Fieldname>Gender</Fieldname> 
</Group> 
<Group> 
<Fieldname>Yearexperience</Fieldname> 
</Group> 
<Group> 
<Fieldname>Monthexperience</Fieldname> 
</Group> 
<Group> 
<Fieldname>Phone</Fieldname> 
</Group> 
<Group> 
<Fieldname>Emailid</Fieldname> 
</Group> 
<Group> 
<Fieldname>Projectid</Fieldname> 
</Group> 
<Group> 
<Fieldname>Reportid</Fieldname> 
</Group> 
<Group> 
<Fieldname>Isanyreporting</Fieldname> 
</Group> 
<Group> 
<Fieldname>Reportcount</Fieldname> 
</Group> 
<Group> 
<Fieldname>Reportname</Fieldname> 
</Group> 
<Group> 
<Fieldname>Photo</Fieldname> 
</Group> 
<Group> 
<Fieldname>Displaylevel</Fieldname> 
</Group> 
<Group> 
<Fieldname>Empcost</Fieldname> 
</Group> 
</Fieldnames> 
</root> 

我的代碼：

public class XMLParsingDomExample extends Activity { 
    List myEmpls; 
    Document dom; 

    public XMLParsingDomExample() { 


     myEmpls = new ArrayList(); 
     parseXmlFile(); 

     parseDocument(); 

     printData(); 


    } 

    /*public void runExample() { 

    }*/ 

    private void parseXmlFile() { 
     DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
     System.out.println("Inside xml"); 

     try { 
      URL url = new URL(
        "http://fhkghkkl.guio"); 
      // "http://totheriver.com/learn/xml/code/employees.xml"); 

      DocumentBuilder db = dbf.newDocumentBuilder(); 

      dom = db.parse(new InputSource(url.openStream())); 

      dom.getDocumentElement().normalize(); 
      System.out.println("after xml"); 

     } catch (ParserConfigurationException pce) { 
      pce.printStackTrace(); 
     } catch (SAXException se) { 
      se.printStackTrace(); 
     } catch (IOException ioe) { 
      ioe.printStackTrace(); 
     } 
    } 


    private void parseDocument() { 
     Element docEle = dom.getDocumentElement(); 
     NodeList nl = docEle.getElementsByTagName("Group"); 
     // NodeList nl = docEle.getElementsByTagName("Common"); 
     // NodeList nl = dom.getDocumentElement().getChildNodes(); 

     System.out.println("nodelist is :" + nl); 
     if (nl != null && nl.getLength() > 0) { 
      for (int i = 0; i < nl.getLength(); i++) { 

       Element el = (Element) nl.item(i); 

       System.out.println("b4 getemployee"); 
       Employee e = getEmployee(el); 

       myEmpls.add(e); 
       System.out.println("employee size is =" + myEmpls.size()); 
      } 
     } 
    } 

    private Employee getEmployee(Element empE1) { 

     String empId = getTextValue(empE1, "Empid"); 

     String name = getTextValue(empE1, "Name"); 
     String repCount = getTextValue(empE1, "Reportcount"); 
     String desid = getTextValue(empE1, "Desigid"); 
     String projectid = getTextValue(empE1, "Projectid"); 
     String projectname = getTextValue(empE1, "Projectname"); 
     // String gender = 
     // getTextValue(empE1, "Gender"); 
     // int yrEx = getIntValue(empE1, 
     // "Yearexperience"); 
     // int mnthEx = getIntValue(empE1, "Monthexperience"); 
     // int prcId = getIntValue(empE1, "ProjectId"); String prcname = 
     // getTextValue(empE1, 
     // "Projectname"); 
     // int dislev = getIntValue(empE1, "Displaylevel"); String photo 
     // = getTextValue(empE1, "Photo"); 
     // int phone = getIntValue(empE1, "Phone"); 
     // String emailid = getTextValue(empE1, "Emailid"); 

     Employee e = new Employee(empId, name, repCount, desid, projectid, 
       projectname); 
     return e; 
    } 

    // } 

    private String getTextValue(Element ele, String tagName) { 
     String textVal = null; 
     NodeList nl = ele.getElementsByTagName(tagName); 
     if (nl != null && nl.getLength() > 0) { 
      Element el = (Element) nl.item(0); 
      textVal = el.getFirstChild().getNodeValue(); 
     } 

     return textVal; 
    } 

    private int getIntValue(Element ele, String tagName) { 
     // in production application you would catch the exception 
     return Integer.parseInt(getTextValue(ele, tagName)); 
    } 

    private void printData() { 

     System.out.println("No of Employees '" + myEmpls.size() + "'."); 

     Iterator it = myEmpls.iterator(); 
     while (it.hasNext()) { 
      System.out.println(it.next().toString()); 
     } 
    } 
} 
    /*public static void main(String[] args) { 

     XMLParsingDomExample dpe = new XMLParsingDomExample(); 

     dpe.runExample(); 
    } 
}*/ 

我的logcat：

我需要這個孤獨：

01-22 13:10:44.519: I/System.out(1606): Employee Details - EmployeeId:370.Empname :Shalini, DesignId:9, ReportCount:0, ProjectId:1, ProjectName:Sabre, 
01-22 13:10:44.537: I/System.out(1606): Employee Details - EmployeeId:381.Empname :Arun, DesignId:0, ReportCount:1, ProjectId:1, ProjectName:Sabre, 
01-22 13:10:44.537: I/System.out(1606): Employee Details - EmployeeId:382.Empname :Manu, DesignId:0, ReportCount:1, ProjectId:1, ProjectName:Sabre, 
01-22 13:10:44.547: I/System.out(1606): Employee Details - EmployeeId:383.Empname :Ramakrishnan Nair, DesignId:0, ReportCount:1, ProjectId:1, ProjectName:Sabre, 
01-22 13:10:44.547: I/System.out(1606): 

而這也是未來：

Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.578: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.578: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.597: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.597: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.617: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.617: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.637: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.637: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.657: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.657: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.667: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.677: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.677: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.687: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 
    01-22 13:10:44.698: I/System.out(1606): Employee Details - EmployeeId:null.Empname :null, DesignId:null, ReportCount:null, ProjectId:null, ProjectName:null, 

Answer 1

如果你是肯定的，那只有一個Common元素，它的所有孩子的是Group秒，比

NodeList common = docEle.getElementsByTagName("Common"); 
NodeList nl = common.item(0).getChildNodes(); 

如果沒有，請使用XPath的更通用的解決方案：

XPathFactory xpathFactory = XPathFactory.newInstance(); 
XPath xpath = xpathFactory.newXPath(); 
NodeList nl = (NodeList) xpath.evaluate("Common/Group", docEle, XPathConstants.NODESET);