{"id":4811,"date":"2021-08-06T10:29:30","date_gmt":"2021-08-06T10:29:30","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=4811"},"modified":"2021-08-06T10:29:31","modified_gmt":"2021-08-06T10:29:31","slug":"java-stax-parser-izmenit-xml-dokument","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/en\/java-stax-parser-izmenit-xml-dokument\/","title":{"rendered":"Java StAX Parser \u2014 \u0418\u0437\u043c\u0435\u043d\u0438\u0442\u044c XML-\u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442"},"content":{"rendered":"\n

\u0412\u043e\u0442 XML, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u2014<\/p>\n\n\n\n

<?xml version = \"1.0\"?>\n<class>\n   <student rollno = \"393\">\n      <firstname>dinkar<\/firstname>\n      <lastname>kad<\/lastname>\n      <nickname>dinkar<\/nickname>\n      <marks>85<\/marks>\n   <\/student>\n   \n   <student rollno = \"493\">\n      <firstname>Vaneet<\/firstname>\n      <lastname>Gupta<\/lastname>\n      <nickname>vinni<\/nickname>\n      <marks>95<\/marks>\n   <\/student>\n   \n   <student rollno = \"593\">\n      <firstname>jasvir<\/firstname>\n      <lastname>singh<\/lastname>\n      <nickname>jazz<\/nickname>\n      <marks>90<\/marks>\n   <\/student>\n<\/class><\/pre>\n\n\n\n
StAXModifyDemo.java<\/h3>\n\n\n\n
package com.tutorialspoint.xml;\n\nimport java.io.File;\nimport java.io.FileNotFoundException;\nimport java.io.FileReader;\nimport java.io.IOException;\nimport java.util.Iterator;\nimport java.util.List;\n\nimport javax.xml.stream.XMLEventReader;\nimport javax.xml.stream.XMLInputFactory;\nimport javax.xml.stream.XMLStreamConstants;\nimport javax.xml.stream.XMLStreamException;\nimport javax.xml.stream.events.Attribute;\nimport javax.xml.stream.events.StartElement;\nimport javax.xml.stream.events.XMLEvent;\n\nimport org.jdom2.Document;\nimport org.jdom2.Element;\nimport org.jdom2.JDOMException;\nimport org.jdom2.input.SAXBuilder;\nimport org.jdom2.output.Format;\nimport org.jdom2.output.XMLOutputter;\n\npublic class StAXModifyDemo {\n\n   public static void main(String[] args) {\n\n      try {\n         XMLInputFactory factory = XMLInputFactory.newInstance();\n         XMLEventReader eventReader = factory.createXMLEventReader(\n            new FileReader(\"input.txt\"));\n         SAXBuilder saxBuilder = new SAXBuilder();\n         Document document = saxBuilder.build(new File(\"input.txt\"));\n         Element rootElement = document.getRootElement();\n         List<Element> studentElements = rootElement.getChildren(\"student\");\n\n         while(eventReader.hasNext()) {\n            XMLEvent event = eventReader.nextEvent();\n            \n            switch(event.getEventType()) {\n               case XMLStreamConstants.START_ELEMENT:\n               StartElement startElement = event.asStartElement();\n               String qName = startElement.getName().getLocalPart();\n\n               if (qName.equalsIgnoreCase(\"student\")) {\n                  Iterator<Attribute> attributes = startElement.getAttributes();\n                  String rollNo = attributes.next().getValue();\n                  \n                  if(rollNo.equalsIgnoreCase(\"393\")) {\n                     \/\/get the student with roll no 393\n\n                     for(int i = 0;i < studentElements.size();i++) {\n                        Element studentElement = studentElements.get(i);\n\n                        if(studentElement.getAttribute(\n                           \"rollno\").getValue().equalsIgnoreCase(\"393\")) {\n                           studentElement.removeChild(\"marks\");\n                           studentElement.addContent(new Element(\"marks\").setText(\"80\"));\n                        }\n                     }\n                  }\n               }\n               break;\n            }\n         }\n         XMLOutputter xmlOutput = new XMLOutputter();\n\n         \/\/ display xml\n         xmlOutput.setFormat(Format.getPrettyFormat());\n         xmlOutput.output(document, System.out);\n      } catch (FileNotFoundException e) {\n         e.printStackTrace();\n      } catch (XMLStreamException e) {\n         e.printStackTrace();\n      } catch (JDOMException e) {\n         e.printStackTrace();\n      } catch (IOException e) {\n         e.printStackTrace();\n      }\n   }\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u0412\u043e\u0442 XML, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u2014 <?xml version = “1.0”?> <class> <student rollno = “393”> <firstname>dinkar<\/firstname> <lastname>kad<\/lastname> <nickname>dinkar<\/nickname> <marks>85<\/marks> […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[153],"tags":[],"class_list":["post-4811","page","type-page","status-publish","hentry","category-java-xml"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/4811","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/comments?post=4811"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/4811\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/media?parent=4811"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/categories?post=4811"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/tags?post=4811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}