问题描述
我想提取<Page>节点内的所有节点。
我正在使用以下方法通过使用以下两种方法来查找XML文档中的所有节点
doc.getElementsByTagName("*"); //getting all the nodes
doc.getElementsByTagName("name"); //getting nodes <name>
但我想找到特定节点内的所有节点。
例如，我想要<page>内的所有节点。
请给我建议一种方法...
<Pages>
<Page>
<Diagram>
<Widgets>
<Image>
<Name>YmcLogo</Name>
<Rectangle>
<Rectangle X="0" Y="4" Width="130" Height="28" />
</Rectangle>
<Bold>False</Bold>
<BorderColor>Color(argb) = (255, 0, 0, 0)</BorderColor>
<BorderWidth>-1</BorderWidth>
<FillColor>Color(argb) = (255, 255, 255, 255)</FillColor>
<FontName>Arial</FontName>
<FontSize>9.75</FontSize>
<ForeColor>Color(argb) = (255, 0, 0, 0)</ForeColor>
<HorizontalAlignment>Center</HorizontalAlignment>
<Italic>False</Italic>
<Underline>False</Underline>
<VerticalAlignment>Center</VerticalAlignment>
<Widgets>
<TextPanel>
<Html><p style="font-size:13px;text-align:center;line-height:normal;"><span style="font-family:'Arial Regular', 'Arial';font-weight:400;font-style:normal;font-size:13px;color:#000000;text-align:center;line-height:normal;">&nbsp;</span></p></Html>
<Name />
<Rectangle>
<Rectangle X="2" Y="6" Width="126" Height="16" />
</Rectangle>
<Bold>False</Bold>
<BorderColor>Color(argb) = (255, 0, 0, 0)</BorderColor>
<BorderWidth>-1</BorderWidth>
<FillColor>Color(argb) = (255, 255, 255, 255)</FillColor>
<FontName>Arial</FontName>
<FontSize>9.75</FontSize>
<ForeColor>Color(argb) = (255, 0, 0, 0)</ForeColor>
<HorizontalAlignment>Center</HorizontalAlignment>
<Italic>False</Italic>
<Underline>False</Underline>
<VerticalAlignment>Center</VerticalAlignment>
</TextPanel>
</Widgets>
</Image>
<ShapeType>H2</ShapeType>
<Annotation>
<Properties>
<PropertyValue PropertyName="ContainerType">conditionContainer</PropertyValue>
</Properties>
</Annotation>
<FootnoteNumber>1</FootnoteNumber>
<Name>SCMProductGroup</Name>
<Rectangle>
<Rectangle X="72" Y="110" Width="127" Height="15" />
</Rectangle>
<Underline>False</Underline>
<VerticalAlignment>Near</VerticalAlignment>
</Shape>
<Textbox>
<Text />
<Annotation>
<Properties>
<PropertyValue PropertyName="ContainerType">conditionContainer</PropertyValue>
<PropertyValue PropertyName="field_label[多言語対応用キー][多语言对应Key]">label.scmProductGroup</PropertyValue>
<PropertyValue PropertyName="type">text</PropertyValue>
<PropertyValue PropertyName="cvcodeobjary ">scmProductGrp</PropertyValue>
<PropertyValue PropertyName="cvcontainerobjary ">scmProductGrpNm</PropertyValue>
<PropertyValue PropertyName="cvfieldstrary ">scmProductGrpName</PropertyValue>
<PropertyValue PropertyName="cvopenmethod ">scmProductGrp_ajax_codeValue</PropertyValue>
<PropertyValue PropertyName="maxlength[桁数-最大][最大位数]">3</PropertyValue>
<PropertyValue PropertyName="size">3</PropertyValue>
</Properties>
</Annotation>
</Textbox>
<Textbox>
<Text />
<Annotation>
<Properties>
<PropertyValue PropertyName="ContainerType">conditionContainer</PropertyValue>
<PropertyValue PropertyName="type">text</PropertyValue>
<PropertyValue PropertyName="datatype">String</PropertyValue>
<PropertyValue PropertyName="styleClass">display</PropertyValue>
<PropertyValue PropertyName="full-width">False</PropertyValue>
<PropertyValue PropertyName="half-width-al">True</PropertyValue>
<PropertyValue PropertyName="half-width-num">False</PropertyValue>
<PropertyValue PropertyName="half-width-other">False</PropertyValue>
</Properties>
</Annotation>
</Textbox>
<Table>
<Annotation>
<Properties>
<PropertyValue PropertyName="ContainerType">DhtmlX Grid Container</PropertyValue>
<PropertyValue PropertyName="maxlength[桁数-最大][最大位数]">3</PropertyValue>
<PropertyValue PropertyName="size">3</PropertyValue>
<PropertyValue PropertyName="group-name">1</PropertyValue>
<PropertyValue PropertyName="group-type">list</PropertyValue>
<PropertyValue PropertyName="collection">result</PropertyValue>
<PropertyValue PropertyName="edit[入出力区分][输入区分]">true</PropertyValue>
<PropertyValue PropertyName="sort">True</PropertyValue>
</Properties>
</Annotation>
<FootnoteNumber>5</FootnoteNumber>
<Name>DHTMLXgrid</Name>
<Rectangle>
<Rectangle X="20" Y="180" Width="812" Height="140" />
</Rectangle>
</Table>
</Widgets>
</Diagram>
<PackageInfo>
<Name>01::inquiry::list</Name>
</PackageInfo>
</Page>
</Pages>
1楼
获取名称为<page>所有节点
NodeList list = doc.getElementsByTagName("page");
如果有很多，请遍历它们，每获得一个孩子
for (Node node : list)
{
//Get all nodes inside the this <page> element
NodeList childList = node.getChildNodes();
}
如果您确实希望每个<page>包含所有节点，则需要递归函数。
这将填充它作为参数获取的列表：
public void getAllChildren(ArrayList<Node> list, Node parentNode)
{
NodeList childList = parentNode.getChildNodes()
for(Node node : childList)
{
list.add(node);
getAllChildren(list, node);
}
}
使用此功能
ArrayList<Node> allNodes = new ArrayList<Node>();
//Get the first node of all elements of <page>
Node pageNode = doc.getElementsByTagName("page").item(0);
getAllChildren(allNodes, pageNode);
//Now every child and child of child etc is on allNodes
2楼
获取页面元素，然后使用 （而不是Document.getElementsByTagName ）。
例如：
Element pageElement = (Element)doc.getElementsByTagName("Page").item(0);
NodeList result = pageElement.getElementsByTagName("Name");
3楼
学习一点 。 XPath是一种小型语言，专门用于获取XML文档的特定部分。
例如，要获取<Page>所有子元素，您可以简单地编写//Page/* 。
或者，如果您想要相同的后代元素，请使用//Page//* ：
XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
XPathExpression expr = xpath.compile("//Page//*");
NodeList result = (NodeList)expr.evaluate(doc, XPathConstants.NODESET);
以供参考 ：
- ：我实际上不是用Java编写代码，以上示例代码已从此链接改编而来
- ：基本XPath语法的介绍，如果您有疑问，请与XPath 1.0 进行交叉检查