XML parsing of Java (Dom4j Technology)

Parsing XML files with Dom4j Technology

I. Introduction to XML

Full name: Extended Markup Language allows programmers to extend new tags according to their own ideas: however, when extending, they must follow the XML specification. 2. The characteristics of XML: it is self descriptive, can support cross platform, and retains the hierarchical sense of object-oriented programming

Third, XML file specification example

IV. detailed explanation of Dom4j Technology

Dom4j: Dom4j is an easy-to-use, open source library for XML, XPath, and XSLT. It is applied to the Java platform, adopts the Java collection framework, and fully supports DOM, sax and jaxp. Dom4j is most widely used in the java development community. The operation of JDOM is very simple, but its performance is poor when processing large XML files. When parsing 10m documents, it will overflow memory. Dom4j is a very excellent Java XML API, which has the characteristics of excellent performance, powerful function and easy to use. At the same time, it is also an open source software. Dom4j uses a large number of interfaces, which is also the reason why it is considered more flexible than JDOM. Now we can see that more and more Java software is using Dom4j to read and write XML. The official address of Dom4j is“ http://www.dom4j.org/ ”。 Note: Dom4j is not sun's own product, so there is no jar package to provide services. We can download the package ourselves, including API (index HTML), jar package, etc.

Fifth, Dom4j technology parses the detailed code of the above XML file

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