Compare XML using Java

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It is developed specially for the SOAP service xml request and response where you can compare according to names and also you can Find the Difference in values.Refer Below code,


  • Compare two xml files.
  • By Using Difference method you can Get the Difference in values.
  • It Also Comapres XML Bi-Directional. 



  2. package com.example.Test;

  4. import java.io.File;
  5. import java.io.IOException;
  6. import java.util.ArrayList;
  7. import java.util.Collection;
  8. import java.util.HashSet;
  9. import java.util.List;
  10. import java.util.Set;

  12. import javax.xml.parsers.DocumentBuilder;
  13. import javax.xml.parsers.DocumentBuilderFactory;
  14. import javax.xml.parsers.ParserConfigurationException;

  16. import org.custommonkey.xmlunit.DetailedDiff;
  17. import org.custommonkey.xmlunit.Difference;
  18. import org.custommonkey.xmlunit.XMLUnit;
  19. import org.w3c.dom.Document;
  20. import org.w3c.dom.Element;
  21. import org.w3c.dom.NamedNodeMap;
  22. import org.w3c.dom.Node;
  23. import org.w3c.dom.NodeList;
  24. import org.xml.sax.SAXException;

  26. public class XmlCompare {

  28. public static void main(String[] args) throws Exception {
  29. String newFile = "F:\\CompareXml\\Res_New0.xml";
  30. String LegacyFile = "F:\\CompareXml\\Res_Legacy0.xml";

  32. compareXMLFiles(newFile, LegacyFile);
  33. //differenceinXMLFile(newFile, LegacyFile);

  35. }

  37. public static void compareXMLFiles(String newFile, String legacy)
  38. throws SAXException, IOException, ParserConfigurationException {

  40. boolean checkDifference=true;
  41. DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
  42. DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
  43. Document doc1 = docBuilder.parse(newFile);
  44. Document doc2 = docBuilder.parse(legacy);

  46. NodeList n1 = doc1.getElementsByTagName("*");
  47. NodeList n2 = doc2.getElementsByTagName("*");

  49. List<String> nodesNewFile = new ArrayList<>();
  50. List<String> nodesLegacy = new ArrayList<>();

  52. for (int i = 6; i < n1.getLength(); i++) {
  53. nodesNewFile.add(n1.item(i).getNodeName().toString().trim());

  55. }

  57. for (int i = 6; i < n2.getLength(); i++) {
  58. nodesLegacy.add(n2.item(i).getNodeName().toString().trim());

  60. }
  61. Set<String> similarq = new HashSet<String>(nodesLegacy);
  62. Set<String> differentq = new HashSet<String>();
  63. differentq.addAll(nodesNewFile);
  64. differentq.addAll(nodesLegacy);
  65. differentq.removeAll(similarq);

  67. Collection<String> similar = new HashSet<String>(nodesNewFile);
  68. Collection<String> different = new HashSet<String>();
  69. different.addAll(nodesNewFile);
  70. different.addAll(nodesLegacy);
  71. //System.out.println("Diff");
  72. different.removeAll(similar);

  74. if (!differentq.isEmpty()) {
  75. System.out.println("***********FAIL*****************");
  76. checkDifference=false;
  77. String element = differentq.iterator().next();
  78. String[] el = element.split(":");
  79. NodeList baseElmntLst_gold = doc2.getElementsByTagName(n2.item(2).getNodeName());
  80. Element baseElmnt_gold = (Element) baseElmntLst_gold.item(0);
  81. System.out.println("FileName:" + new File(newFile).getName());
  82. NamedNodeMap baseElmnt_gold_attr = baseElmnt_gold.getAttributes();
  83. for (int i = 0; i < baseElmnt_gold_attr.getLength(); ++i) {

  85. Node attr = baseElmnt_gold_attr.item(i);
  86. if (attr.getNodeName().contains(el[0])) {
  87. System.out.println(attr.getNodeName() + " = \"" + attr.getNodeValue() + "\"");
  88. }
  89. }

  91. } else if (!different.isEmpty()) {
  92. System.out.println("***********FAIL*****************");
  93. checkDifference=false;
  94. String element = different.iterator().next();
  95. String[] el = element.split(":");
  96. NodeList baseElmntLst_gold = doc1.getElementsByTagName(n1.item(2).getNodeName());
  97. Element baseElmnt_gold = (Element) baseElmntLst_gold.item(0);
  98. System.out.println("FileName:" + new File(legacy).getName());
  99. NamedNodeMap baseElmnt_gold_attr = baseElmnt_gold.getAttributes();
  100. for (int i = 0; i < baseElmnt_gold_attr.getLength(); ++i) {

  102. Node attr = baseElmnt_gold_attr.item(i);
  103. if (attr.getNodeName().contains(el[0])) {
  104. System.out.println(attr.getNodeName() + " = \"" + attr.getNodeValue() + "\"");
  105. }
  106. }

  108. //System.out.println(different);

  110. }

  112. if(checkDifference){
  113. differenceinXMLFile(newFile,legacy);
  114. } 

  116. }

  118. public static void differenceinXMLFile(String newFile, String legacy)
  119. throws SAXException, IOException, ParserConfigurationException {

  121. DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
  122. DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
  123. Document doc1 = docBuilder.parse(newFile);
  124. Document doc2 = docBuilder.parse(legacy);
  125. List<String> ls = new ArrayList<>();

  127. XMLUnit.setIgnoreWhitespace(true);
  128. XMLUnit.setIgnoreAttributeOrder(true);

  130. DetailedDiff diff = new DetailedDiff(XMLUnit.compareXML(doc1, doc2));

  132. List<Difference> allDifferences = diff.getAllDifferences();

  134. for (Difference diffVale : allDifferences) {

  136. ls.add("<" + diffVale.getControlNodeDetail().getNode().getParentNode().getNodeName() + ">"
  137. + diffVale.getControlNodeDetail().getValue() + "</"
  138. + diffVale.getControlNodeDetail().getNode().getParentNode().getNodeName() + ">");
  139. // System.out.println();
  140. // System.out.println();
  141. // System.out.println(diffVale.getTestNodeDetail());
  142. }
  143. boolean disp=true;
  144. if (!ls.isEmpty()) {
  145. for (int i = 5; i < ls.size(); i++) {
  146. System.out.println(ls.get(5));
  147. disp=false;
  148. }
  149. }
  150. if(disp){
  151. System.out.println("Success No Difference Anywhere");
  152. }

  154. // Assert.assertEquals("Differences found: "+ diff.toString(), 0,
  155. // allDifferences.size());
  156. }

  158. }




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