我正在尝试使用以下java代码解析xml文件。问题是当它从内部读取数据时我可以从每个地方检索数据数据，但是如果一个包下有多个项目，这意味着，虽然它不会检索父项下的所有孩子，你能帮忙吗？
import java.io.File;
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public class ReadAndPrintXMLFile{
public static void ReadXmlandParce(String filename){
try {
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse (new File(filename));
// normalize text representation
doc.getDocumentElement ().normalize ();
System.out.println ("Root element of the doc is " +
doc.getDocumentElement().getNodeName());
NodeList Messagend = doc.getElementsByTagName("IMessage");
for(int s=0; s<Messagend.getLength() ; s++){
Node MessageItemNode = Messagend.item(s);
if(MessageItemNode.getNodeType() == Node.ELEMENT_NODE){
Element MessageElement = (Element)MessageItemNode;
//-------
NodeList MessageNamend = MessageElement.getElementsByTagName("IMessageName");
Element MessageNameElement = (Element)MessageNamend.item(0);
NodeList textMessageName = MessageNameElement.getChildNodes();
System.out.println("MessageName : " +
((Node)textMessageName.item(0)).getNodeValue().trim());
//-------
NodeList MessageDatend = MessageElement.getElementsByTagName("IMessageDate");
Element MessageDateElement = (Element)MessageDatend.item(0);
NodeList textMessageDate = MessageDateElement.getChildNodes();
System.out.println("MessageDate : " +
((Node)textMessageDate.item(0)).getNodeValue().trim());
//----
NodeList ServiceOrderednd = MessageElement.getElementsByTagName("IServiceOrderedType");
Element ServiceOrderedElement = (Element)ServiceOrderednd.item(0);
NodeList textServiceOrdered = ServiceOrderedElement.getChildNodes();
System.out.println("ServiceOrdered : " +
((Node)textServiceOrdered.item(0)).getNodeValue().trim());
//------
NodeList ServiceTypend = MessageElement.getElementsByTagName("IServiceType");
Element ServiceTypeElement = (Element)ServiceTypend.item(0);
NodeList textServiceType = ServiceTypeElement.getChildNodes();
System.out.println("ServiceType : " +
((Node)textServiceType.item(0)).getNodeValue().trim());
//------
NodeList SpecialInstructionsnd = MessageElement.getElementsByTagName("Instructions");
Element SpecialInstructionsElement = (Element)SpecialInstructionsnd.item(0);
NodeList textSpecialInstructions = SpecialInstructionsElement.getChildNodes();
System.out.println("SpecialInstructions : " +
((Node)textSpecialInstructions.item(0)).getNodeValue().trim());
//------
NodeList CompanyNamend = MessageElement.getElementsByTagName("CompanyName");
Element CompanyNameElement = (Element)CompanyNamend.item(0);
NodeList textCompanyName = CompanyNameElement.getChildNodes();
System.out.println("CompanyName : " +
((Node)textCompanyName.item(0)).getNodeValue().trim());
//------
}//end of if clause
}//end of for loop with s var
///////////////////////////////////
NodeList Consigneend = doc.getElementsByTagName("UConsignee");
for(int j=0; j<Consigneend.getLength() ; j++){
Node ConsigneeItemNode = Consigneend.item(j);
if(ConsigneeItemNode.getNodeType() == Node.ELEMENT_NODE){
Element ConsigneeElement = (Element)ConsigneeItemNode;
//-------
NodeList CompanyCodend = ConsigneeElement.getElementsByTagName("UCompanyCode");
Element CompanyCodeElement = (Element)CompanyCodend.item(0);
NodeList textCompanyCode = CompanyCodeElement.getChildNodes();
try{
System.out.println("UCompanyCode : " +((Node)textCompanyCode.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("UCompanyCode : empty");
}
//-------
NodeList CompanyNamend = ConsigneeElement.getElementsByTagName("UCompanyName");
Element CompanyNameElement = (Element)CompanyNamend.item(0);
NodeList textCompanyName = CompanyNameElement.getChildNodes();
System.out.println("CompanyName : " +
((Node)textCompanyName.item(0)).getNodeValue().trim());
//----
NodeList TaxNond = ConsigneeElement.getElementsByTagName("UTaxNo");
Element TaxNoElement = (Element)TaxNond.item(0);
NodeList textTaxNo= TaxNoElement.getChildNodes();
System.out.println("TaxNo : " +
((Node)textTaxNo.item(0)).getNodeValue().trim());
//------
NodeList Street1nd = ConsigneeElement.getElementsByTagName("Street1");
Element Street1Element = (Element)Street1nd.item(0);
NodeList textStreet1 = Street1Element.getChildNodes();
try{
System.out.println("Street1 : " +
((Node)textStreet1.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("Street1 : empty");
}
//----
NodeList Street2nd = ConsigneeElement.getElementsByTagName("Street2");
Element Street2Element = (Element)Street2nd.item(0);
NodeList textStreet2 = Street2Element.getChildNodes();
try{
System.out.println("Street2 : " +
((Node)textStreet2.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("Street2 : empty");
}
//----
NodeList PostalCodend = ConsigneeElement.getElementsByTagName("PostalCode");
Element PostalCodeElement = (Element)PostalCodend.item(0);
NodeList textPostalCode = PostalCodeElement.getChildNodes();
try{
System.out.println("PostalCode : " +
((Node)textPostalCode.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("PostalCode : empty");
}
//----
NodeList CityNamend = ConsigneeElement.getElementsByTagName("CityName");
Element CityNameElement = (Element)CityNamend.item(0);
NodeList textCityName = CityNameElement.getChildNodes();
try{
System.out.println("CityName : " +
((Node)textCityName.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("CityName : empty");
}
//----
NodeList Countrynd = ConsigneeElement.getElementsByTagName("Country");
Element CountryElement = (Element)Countrynd.item(0);
NodeList textCountry = CountryElement.getChildNodes();
try{
System.out.println("Country : " +
((Node)textCountry.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("Country : Bos");
}
//----
NodeList TaxRegNond = ConsigneeElement.getElementsByTagName("TaxRegNo");
Element TaxRegNoElement = (Element)TaxRegNond.item(0);
NodeList textTaxRegNo = TaxRegNoElement.getChildNodes();
try{
System.out.println("TaxRegNo : " +
((Node)textTaxRegNo.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("TaxRegNo : empty");
}
//----
System.out.println ("+++++++++++++++++++++++++++");
System.out.println ("Begin of Package");
System.out.println ("+++++++++++++++++++++++++++");
NodeList Packagend = doc.getElementsByTagName("CPackage");
for(int k=0; k<Packagend.getLength() ; k++){
Node PackageItemNode = Packagend.item(k);
if(PackageItemNode.getNodeType() == Node.ELEMENT_NODE){
Element PackageElement = (Element)PackageItemNode;
//-------
NodeList PackageTypend = PackageElement.getElementsByTagName("CPackageType");
Element PackageTypeElement = (Element)PackageTypend.item(0);
NodeList textPackageType = PackageTypeElement.getChildNodes();
try{
System.out.println("PackageType : " +
((Node)textPackageType.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("PackageType : empty");
}
//-------
NodeList GrossWeightnd = PackageElement.getElementsByTagName("CGrossWeight");
Element GrossWeightElement = (Element)GrossWeightnd.item(0);
NodeList textGrossWeight = GrossWeightElement.getChildNodes();
try{
System.out.println("GrossWeight : " +
((Node)textGrossWeight.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("GrossWeight : empty");
}
//-------
NodeList Barcodend = PackageElement.getElementsByTagName("CBarcode");
Element BarcodeElement = (Element)Barcodend.item(0);
NodeList textBarcode = BarcodeElement.getChildNodes();
try{
System.out.println("Barcode : " +
((Node)textBarcode.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("Barcode : empty");
}
//-------
System.out.println ("+++++++++++++++++++++++++++");
System.out.println ("Begin of Item");
System.out.println ("+++++++++++++++++++++++++++");
NodeList Itemnd = doc.getElementsByTagName("Item");
for(int p=0; p<Itemnd.getLength() ; p++){
Node ItemNode = Itemnd.item(p);
if(ItemNode.getNodeType() == Node.ELEMENT_NODE){
Element ItemElement = (Element)ItemNode;
NodeList ItemCodend = ItemElement.getElementsByTagName("ItemCode");
Element ItemCodeElement = (Element)ItemCodend.item(0);
NodeList textItemCode = ItemCodeElement.getChildNodes();
try{
System.out.println("ItemCode : " +
((Node)textItemCode.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("ItemCode : empty");
}
//-------
NodeList Quantitynd = ItemElement.getElementsByTagName("ItemQuantity");
Element QuantityElement = (Element)Quantitynd.item(0);
NodeList textQuantity = QuantityElement.getChildNodes();
try{
System.out.println("Quantity : " +
((Node)textQuantity.item(0)).getNodeValue().trim());
}
catch (NullPointerException err ) {
System.out.println ("Quantity : empty");
}
//-------
}
}
}
}
}//end of if clause
}
///////////////////////////////////
}catch (SAXParseException err) {
System.out.println ("** Parsing error" + ", line "
+ err.getLineNumber () + ", uri " + err.getSystemId ());
System.out.println(" " + err.getMessage ());
}catch (SAXException e) {
Exception x = e.getException ();
((x == null) ? e : x).printStackTrace ();
}catch (Throwable t) {
t.printStackTrace ();
}
//System.exit (0);
}
}
请找到如下的xml
<IMessage>
<IMessageName>IM1234</IMessageName>
<IMessageDate>20140328</IMessageDate>
<IServiceOrderedType>Normal</IServiceOrderedType>
<IServiceType>AIR</IServiceType>
<Instructions>OP123456</Instructions>
<CompanyName>Test</CompanyName>
<UConsignee>
<UCompanyCode></UCompanyCode>
<UTaxNo>T1231132123</UTaxNo>
<Street1>test132132</Street1>
<Street2>Streeet1</Street2>
<PostalCode>121212</PostalCode>
<CityName>London</CityName>
<Country>UK</Country>
<TaxRegNo>121313</TaxRegNo>
<CPackage>
<CPackageType>BIG</CPackageType>
<CGrossWeight>12</CGrossWeight>
<CBarcode>54353454353</CBarcode>
<Item>
<ItemCode>IT122111</ItemCode>
<ItemQuantity>50</ItemQuantity>
</Item>
<Item>
<ItemCode>IT122851</ItemCode>
<ItemQuantity>10</ItemQuantity>
</Item>
<Item>
<ItemCode>IT122151</ItemCode>
<ItemQuantity>18</ItemQuantity>
</Item>
</CPackage>
<CPackage>
<CPackageType>MEDIUM</CPackageType>
<CGrossWeight>14</CGrossWeight>
<CBarcode>54353454354</CBarcode>
<Item>
<ItemCode>IT18581</ItemCode>
<ItemQuantity>100</ItemQuantity>
</Item>
<Item>
<ItemCode>IT98561</ItemCode>
<ItemQuantity>60</ItemQuantity>
</Item>
<Item>
<ItemCode>IT68961</ItemCode>
<ItemQuantity>12</ItemQuantity>
</Item>
</CPackage>
</UConsignee>
</IMessage>
答案 0 :(得分：0)
我已经找到了应该通过嵌套NodeList方法继续迭代的答案，如下面的代码
NodeList PackageRootNodeList = Messagend .getElementsByTagName("CPackage"); for(int n=0; n<PackageRootNodeList .getLength() ; n++){ Node PackageNode = PackageRootNodeList .item(s); Element PackageRootElement = (Element)PackageNode ; //-------NodeList PackageBarcodeNodeList = PackageRootElement .getElementsByTagName（“CBarcode”）; Element PackageBarcodeElement =（Element）PackageBarcodeNodeList .item（0）;
NodeList textCBarcode = PackageBarcodeElement .getChildNodes(); System.out.println("CBarcode: " + ((Node)textCBarcode.item(0)).getNodeValue().trim()); ///// ///// You will continue as the same methood in order to make deep iteration ///// }