我有以下 XML 文件,如果 EventType 匹配开始或分配,我将尝试从中删除整个 AuditTrailEntry 节点。我在 stackoverflow 上看到过类似的情况,但该解决方案对我不起作用,我总是收到错误 - NOT_FOUND_ERR:如果 oldChild 不是该节点的子节点,则引发。你知道如何解决这个问题吗?
this.setState
<AuditTrailEntry>
<Data>
<Attribute name="elementId">sid-9E1E4EAD-5182-482F-9D5C-10961CA5BE2D</Attribute>
<Attribute name="processId">sid-C83E31C0-4CCC-4763-90C2-E09F1537D1EC</Attribute>
</Data>
<WorkflowModelElement>Test</WorkflowModelElement>
<EventType>assign</EventType>
<Timestamp>2021-06-17T13:20:10.557+00:00</Timestamp>
</AuditTrailEntry>
<AuditTrailEntry>
<Data>
<Attribute name="elementId">sid-9E1E4EAD-5182-482F-9D5C-10961CA5BE2D</Attribute>
<Attribute name="processId">sid-C83E31C0-4CCC-4763-90C2-E09F1537D1EC</Attribute>
<Attribute name="resourceId">sid-B0EBDEE1-4649-4AB6-B9AD-159188A0A02E</Attribute>
</Data>
<WorkflowModelElement>Test</WorkflowModelElement>
<EventType>start</EventType>
<Timestamp>2021-06-17T13:56:47.003+00:00</Timestamp>
<Originator>Test-000002</Originator>
</AuditTrailEntry>
<AuditTrailEntry>
<Data>
<Attribute name="elementId">sid-9E1E4EAD-5182-482F-9D5C-10961CA5BE2D</Attribute>
<Attribute name="processId">sid-C83E31C0-4CCC-4763-90C2-E09F1537D1EC</Attribute>
<Attribute name="resourceCost">0.8558947222222222</Attribute>
<Attribute name="resourceId">sid-B0EBDEE1-4649-4AB6-B9AD-159188A0A02E</Attribute>
</Data>
<WorkflowModelElement>Test</WorkflowModelElement>
<EventType>complete</EventType>
<Timestamp>2021-06-17T14:01:27.114+00:00</Timestamp>
<Originator>Test-000002</Originator>
</AuditTrailEntry>
答案 0 :(得分:1)
使用 XPath,事情变得容易多了:
XPath xpath = XPathFactory
.newInstance()
.newXPath();
String expression = "//AuditTrailEntry[EventType='assign' or EventType='start']";
NodeList list = (NodeList) xpath.evaluate(expression, XML_DOC, XPathConstants.NODESET);
for (int i=0; i < list.getLength(); ++i) {
Node target = list.item(i);
target.getParentNode().removeChild(target);
}
答案 1 :(得分:1)
对于此类任务,最好使用 XSLT。
XML 文件应具有根节点的格式良好。
XSLT 有所谓的身份转换模式。
XSLT
<?xml version='1.0'?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" encoding="utf-8" indent="yes" omit-xml-declaration="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<!--<xsl:template match="AuditTrailEntry[EventType=('assign','start')]"/>-->
<xsl:template match="AuditTrailEntry[EventType='assign' or EventType='start']"/>
</xsl:stylesheet>
Java
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.io.*;
public class Process {
public static void main(String[] args) {
String XSLTFILE = "e:/Temp/Process.xslt";
String INFILE = "e:/Temp/Input.xml";
String OUTFILE = "e:/Temp/Output.xml";
try {
// I/O
StreamSource input = new StreamSource(new File(INFILE));
StreamSource xslt = new StreamSource(new File(XSLTFILE));
StreamResult output = new StreamResult(new File(OUTFILE));
// Transformation
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(xslt);
transformer.transform(input, output);
} catch (TransformerConfigurationException tce) {
tce.printStackTrace();
} catch (TransformerException te) {
te.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}