java - JAVA中XML文件比较忽略节点顺序

Question

我想使用 JAVA 比较 xml 文件并检查它们是否“等效”。下面的代码在两种情况下适用于我:

1. 当 xml 文件完全相同时。
2. 当xml文件有差异时

但在以下情况下失败:

XML 文件包含相同的节点，但它们的顺序不同。

一个名为 Sample.xml 的文件，其内容如下:

<Employee>
    <FirstName>Jack</FirstName>
    <LastName>Dave</LastName>
    <Age>21</Age>
    <Professtion>Doctor</Professtion>
</Employee>

另一个名为 Sample1.xml 的文件，其内容为:

<Employee>
    <Age>21</Age>
    <Professtion>Doctor</Professtion>
    <FirstName>Jack</FirstName>
    <LastName>Dave</LastName>
</Employee>

请注意，内容相同，但顺序不同。

我尝试过[这个1 ] 但它对我不起作用。

我尝试的代码如下:

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.List;

import org.custommonkey.xmlunit.DetailedDiff;
import org.custommonkey.xmlunit.Diff;
import org.custommonkey.xmlunit.XMLUnit;
import org.custommonkey.xmlunit.examples.RecursiveElementNameAndTextQualifier;

public class CompareXML {

    public static void main(String[] args) {

        try (BufferedReader bufferedReaderExistingFile = new BufferedReader(new FileReader("C:\\Test\\Sample.xml"));
                BufferedReader bufferedReaderNewFile = new BufferedReader(new FileReader("C:\\Test\\Sample1.xml"))) {

            XMLUnit.setIgnoreWhitespace(true);
            XMLUnit.setIgnoreAttributeOrder(true);
            XMLUnit.setIgnoreComments(true);

            Diff d = new Diff(bufferedReaderExistingFile, bufferedReaderNewFile); 
            d.overrideElementQualifier(new RecursiveElementNameAndTextQualifier());
            DetailedDiff detailedDiff = new DetailedDiff(d);
            List<?> allDifferences1 = detailedDiff.getAllDifferences();

            System.out.println("  difference are :: " + allDifferences1.isEmpty());
            System.out.println("  difference are :: " + allDifferences1.size());
            System.out.println("  difference are :: " + allDifferences1.toString());

        }catch(Exception e) {
            System.out.println(e.getMessage());
        }
    }

}

我还尝试了以下代码:

Diff diff = DiffBuilder.compare(bufferedReaderExistingFile)
    .withTest(bufferedReaderNewFile).ignoreComments()
    .ignoreWhitespace()
    .withNodeMatcher(new DefaultNodeMatcher(ElementSelectors.byName))
    .checkForSimilar()
    .build();

System.out.println("  difference are :: " + diff.hasDifferences());

Answer 1

您可以使用 DifferenceEvaluators 来做到这一点:

DifferenceEvaluator evaluator = DifferenceEvaluators
  .downgradeDifferencesToEquals(ComparisonType.CHILD_NODELIST_SEQUENCE);



Diff diff = DiffBuilder.compare(bufferedReaderExistingFile)
    .withTest(bufferedReaderNewFile).ignoreComments()
    .ignoreWhitespace()
    .withNodeMatcher(new DefaultNodeMatcher(ElementSelectors.byName))
    .withDifferenceEvaluator(evaluator)
    .checkForSimilar()
    .build();