{"id":4787,"date":"2021-08-06T10:06:48","date_gmt":"2021-08-06T10:06:48","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=4787"},"modified":"2021-08-06T10:06:49","modified_gmt":"2021-08-06T10:06:49","slug":"java-sax-parser-zapros-xml-dokumenta","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/uk\/java-sax-parser-zapros-xml-dokumenta\/","title":{"rendered":"Java SAX Parser \u2014 \u0437\u0430\u043f\u0440\u043e\u0441 XML-\u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430"},"content":{"rendered":"\n

\u0412\u043e\u0442 \u0432\u0445\u043e\u0434\u043d\u043e\u0439 \u0442\u0435\u043a\u0441\u0442\u043e\u0432\u044b\u0439 \u0444\u0430\u0439\u043b, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0430\u043c \u043d\u0443\u0436\u0435\u043d \u0434\u043b\u044f \u0437\u0430\u043f\u0440\u043e\u0441\u0430 rollno: 393<\/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>singn<\/lastname>\n      <nickname>jazz<\/nickname>\n      <marks>90<\/marks>\n   <\/student>\n<\/class><\/pre>\n\n\n\n
UserHandler.java<\/h3>\n\n\n\n
package com.tutorialspoint.xml;\n\nimport org.xml.sax.Attributes;\nimport org.xml.sax.SAXException;\nimport org.xml.sax.helpers.DefaultHandler;\n \npublic class UserHandler extends DefaultHandler {\n\n   boolean bFirstName = false;\n   boolean bLastName = false;\n   boolean bNickName = false;\n   boolean bMarks = false;\n   String rollNo = null;\n\n   @Override\n   public void startElement(\n      String uri, String localName, String qName, Attributes attributes)\n      throws SAXException {\n\n      if (qName.equalsIgnoreCase(\"student\")) {\n         rollNo = attributes.getValue(\"rollno\");\n      }\n      if((\"393\").equals(rollNo) && \n         qName.equalsIgnoreCase(\"student\")) {\n         System.out.println(\"Start Element :\" + qName);      \n      }       \n      if (qName.equalsIgnoreCase(\"firstname\")) {\n         bFirstName = true;\n      } else if (qName.equalsIgnoreCase(\"lastname\")) {\n         bLastName = true;\n      } else if (qName.equalsIgnoreCase(\"nickname\")) {\n         bNickName = true;\n      }\n      else if (qName.equalsIgnoreCase(\"marks\")) {\n         bMarks = true;\n      }\n   }\n\n   @Override\n   public void endElement(\n      String uri, String localName, String qName) throws SAXException {\n      \n      if (qName.equalsIgnoreCase(\"student\")) {\n         if((\"393\").equals(rollNo) && qName.equalsIgnoreCase(\"student\"))\n         System.out.println(\"End Element :\" + qName);\n      }\n   }\n\n   @Override\n   public void characters(char ch[], int start, int length) throws SAXException {\n\n      if (bFirstName && (\"393\").equals(rollNo)) {\n         \/\/age element, set Employee age\n         System.out.println(\"First Name: \" + new String(ch, start, length));\n         bFirstName = false;\n      } else if (bLastName && (\"393\").equals(rollNo)) {\n         System.out.println(\"Last Name: \" + new String(ch, start, length));\n         bLastName = false;\n      } else if (bNickName && (\"393\").equals(rollNo)) {\n         System.out.println(\"Nick Name: \" + new String(ch, start, length));\n         bNickName = false;\n      } else if (bMarks && (\"393\").equals(rollNo)) {\n         System.out.println(\"Marks: \" + new String(ch, start, length));\n         bMarks = false;\n      }\n   }\n}<\/pre>\n\n\n\n
SAXQueryDemo.java<\/h3>\n\n\n\n
package com.tutorialspoint.xml;\n\nimport java.io.File;\nimport javax.xml.parsers.SAXParser;\nimport javax.xml.parsers.SAXParserFactory;\n\nimport org.xml.sax.Attributes;\nimport org.xml.sax.SAXException;\nimport org.xml.sax.helpers.DefaultHandler;\n\npublic class SAXQueryDemo {\n\n   public static void main(String[] args) {\n\n      try {\n         File inputFile = new File(\"input.txt\");\n         SAXParserFactory factory = SAXParserFactory.newInstance();\n         SAXParser saxParser = factory.newSAXParser();\n         UserHandler userhandler = new UserHandler();\n         saxParser.parse(inputFile, userhandler);     \n      } catch (Exception e) {\n         e.printStackTrace();\n      }\n   }   \n}\n\nclass UserHandler extends DefaultHandler {\n\n   boolean bFirstName = false;\n   boolean bLastName = false;\n   boolean bNickName = false;\n   boolean bMarks = false;\n   String rollNo = null;\n\n   @Override\n   public void startElement(String uri, \n      String localName, String qName, Attributes attributes)\n      throws SAXException {\n\n      if (qName.equalsIgnoreCase(\"student\")) {\n         rollNo = attributes.getValue(\"rollno\");\n      }\n      if((\"393\").equals(rollNo) && qName.equalsIgnoreCase(\"student\")) {\n         System.out.println(\"Start Element :\" + qName);      \n      }       \n      if (qName.equalsIgnoreCase(\"firstname\")) {\n         bFirstName = true;\n      } else if (qName.equalsIgnoreCase(\"lastname\")) {\n         bLastName = true;\n      } else if (qName.equalsIgnoreCase(\"nickname\")) {\n         bNickName = true;\n      }\n      else if (qName.equalsIgnoreCase(\"marks\")) {\n         bMarks = true;\n      }\n   }\n\n   @Override\n   public void endElement(\n      String uri, String localName, String qName) throws SAXException {\n      \n      if (qName.equalsIgnoreCase(\"student\")) {\n\n         if((\"393\").equals(rollNo) \n            && qName.equalsIgnoreCase(\"student\"))\n            System.out.println(\"End Element :\" + qName);\n      }\n   }\n\n\n   @Override\n   public void characters(\n      char ch[], int start, int length) throws SAXException {\n\n      if (bFirstName && (\"393\").equals(rollNo)) {\n         \/\/age element, set Employee age\n         System.out.println(\"First Name: \" + new String(ch, start, length));\n         bFirstName = false;\n      } else if (bLastName && (\"393\").equals(rollNo)) {\n         System.out.println(\"Last Name: \" + new String(ch, start, length));\n         bLastName = false;\n      } else if (bNickName && (\"393\").equals(rollNo)) {\n         System.out.println(\"Nick Name: \" + new String(ch, start, length));\n         bNickName = false;\n      } else if (bMarks && (\"393\").equals(rollNo)) {\n         System.out.println(\"Marks: \" + new String(ch, start, length));\n         bMarks = false;\n      }\n   }\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u0412\u043e\u0442 \u0432\u0445\u043e\u0434\u043d\u043e\u0439 \u0442\u0435\u043a\u0441\u0442\u043e\u0432\u044b\u0439 \u0444\u0430\u0439\u043b, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0430\u043c \u043d\u0443\u0436\u0435\u043d \u0434\u043b\u044f \u0437\u0430\u043f\u0440\u043e\u0441\u0430 rollno: 393 <?xml version = “1.0”?> <class> <student rollno = “393”> […]<\/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-4787","page","type-page","status-publish","hentry","category-java-xml"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/4787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/comments?post=4787"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/pages\/4787\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/media?parent=4787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/categories?post=4787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/uk\/wp-json\/wp\/v2\/tags?post=4787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}