Category: 17. Java XML

Java DOM4J API provides methods to modify XML documents. We might come across situations where we need to update few details in a large XML document. For example, an e-commerce website has many products whose price may vary on a daily or monthly basis. In such cases, modifying the already existing file makes the job…

Java DOM4J library has classes, interfaces and methods to create XML documents. The interfaces Document and Element of org.dom4j package has methods to create XML documents. The XMLWriter class of org.dom4j.io package writes the XML content of the document into the file. In this chapter we are going to use these interfaces and classes to…

Java DOM4J parser is an open source Java library to parse and query the necessary information from XML documents. We can query XML documents using the methods of Document and Element interfaces of DOM4J. The elements() method retrieves all the elements of root element. Using attributeValue() method, we can query the attributes of elements. Query…

Java DOM4J parser is an API in Java to parse XML documents. It creates DOM4J document from a built-in SAX parser or a DOM parser. After getting the document, we can retrieve the information of elements and attributes using the built-in methods of DOM4J Document and Element interfaces. In this chapter, we have used getRootElement()…

DOM4J is an open source, Java-based library to parse XML documents. It is a highly flexible and memory-efficient API. It is Java-optimized and uses Java collections like List and Arrays. DOM4J works with DOM, SAX, XPath, and XSLT. It can parse large XML documents with very low memory footprint. Environment Setup In order to use…

XPath parser is used to navigate XML Documents only. It is better to use DOM parser for modifying XML. Please refer the Java DOM Parser section for the same.

XPath parser is used to navigate XML Documents only. It is better to use DOM parser for creating XML. Please refer the Java DOM Parser section for the same.

Java XPath is a Java API that helps us query XML documents using XPath expressions. Using XPath expressions, random access of elements is possible and hence we can select specific nodes from an XML document. This makes querying the documents more flexible. In this chapter, we have used XPath expressions with predicates such as ‘/cars/carname/@company’,…

Java XPath parser is an API in Java to parse XML documents using XPath expressions and functions. It helps us to traverse through the entire XML document and obtain elements as nodes inside a NodeList. The package ‘javax.xml.xpath’ provides the API for the evaluation of XPath expressions. In this chapter, we will see how to…

XPath is an XML Path language to find information in an XML file. It is an official recommendation of the World Wide Web Consortium (W3C). It is used to traverse elements and attributes of an XML document. XPath provides various types of expressions which can be used to enquire relevant information from the XML document…