将 XML 文档插入到另一个 XML 文档上的特定节点 (java) [英] Insert XML document to a specific node on another XML document (java)
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问题描述
我有一个 XML1:
<letterContent>
<key1>key1</key1>
<key2>key2</key2>
<type>456</type>
<object1>789</object1>
<effectiveDate>00</effectiveDate>
<expandedData />
</letterContent>
... 和 XML 2:
... and XML 2:
<expandedData>
<rsnForReg>
<legacyTIN>
<asCurrent>leg123</asCurrent>
</legacyTIN>
<etpmTIN>
<asCurrent>etpm123</asCurrent>
</etpmTIN>
<regType>
<asCurrent/>
</regType>
</rsnForReg>
</expandedData>
我想使用 JAVA 在扩展数据节点上的 XML 1 文档中插入 XML 2.
I want to insert XML 2 in XML 1 document on the expandedData node using JAVA.
最终的 XML1 应如下所示:
The final XML1 should look like:
<letterContent>
<key1>key1</key1>
<key2>key2</key2>
<type>456</type>
<object1>789</object1>
<effectiveDate>00</effectiveDate>
<expandedData>
<rsnForReg>
<legacyTIN>
<asCurrent>leg123</asCurrent>
</legacyTIN>
<etpmTIN>
<asCurrent>etpm123</asCurrent>
</etpmTIN>
<regType>
<asCurrent/>
</regType>
</rsnForReg>
</expandedData>
</letterContent>
插入到 XML1 的 expandData 节点上的 XML2.有任何想法吗?我知道我需要构建一个递归函数来遍历 XML 2,但不确定如何在 Java 中实现它.
XML2 inserted on the XML1's expandedData node. Any ideas? I know i need to build a recursive function to loop through XML 2 but not sure how to implement it in java.
推荐答案
考虑使用 XPath:
import static javax.xml.xpath.XPathConstants.*;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.*;
import org.w3c.dom.*;
import org.xml.sax.InputSource;
public class Xml2into1 {
public static void main(String[] args) throws Exception {
// read from files
InputSource xml1 = new InputSource("xml1.xml");
InputSource xml2 = new InputSource("xml2.xml");
// find the node to add to
XPath xpath = XPathFactory.newInstance()
.newXPath();
Node expandedData1 = (Node) xpath.evaluate("//expandedData", xml1, NODE);
Document doc1 = expandedData1.getOwnerDocument();
// insert the nodes
Node expandedData2 = (Node) xpath.evaluate("//expandedData", xml2, NODE);
expandedData1.getParentNode()
.replaceChild(doc1.adoptNode(expandedData2), expandedData1);
// print results
TransformerFactory.newInstance()
.newTransformer()
.transform(new DOMSource(doc1), new StreamResult(System.out));
}
}
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