> About Us Home Contributors License Components Sandbox Commons JXPath Overview User's Guide Javadoc (Release 1.2) Release Notes (1.2) Mailing lists Team CVS Project Documentation About JXPath Project Info Project Reports Development Process General Information Charter Volunteering Contributing Patches Releasing Components Jakarta Community Get Involved Mailing Lists Access CVS Repositories Commons Resources (Unofficial) Wiki Japanese Translation Korean Translation Related Apache Commons DB Commons XML Commons | ### The JXPath Component The `org.apache.commons.jxpath` package defines a simple interpreter of an expression language called XPath. JXPath applies XPath expressions to graphs of objects of all kinds: JavaBeans, Maps, Servlet contexts, DOM etc, including mixtures thereof. Consider this example:
>     Address address = (Address)JXPathContext.newContext(vendor).
>              getValue("locations[address/zipCode='90210']/address");
> This XPath expression is equvalent to the following Java code:
>     Address address = null;
>     Collection locations = vendor.getLocations();
>     Iterator it = locations.iterator();
>     while (it.hasNext()){
>         Location location = (Location)it.next();
>         String zipCode = location.getAddress().getZipCode();
>         if (zipCode.equals("90210")){
>           address = location.getAddress();
>           break;
>         }
>     }
XPath was standardized by W3C and is used in both XSLT and XPointer. If you want to find out more about XPath, a good place to start is an excellent XPath Tutorial by W3Schools The official definition of XPath by W3C can be found at XML Path Language (XPath) Version 1.0 Primary applications of JXPath are in scripting: JSP and similar template/script based technologies. However, programmers who prefer XML-flavored APIs, should consider JXPath as an alternative to other expression languages as well. JXPath is a must-have tool for those who work with mixtures of Java objects and XML and need to frequently traverse through graphs of those. JXPath documentation currently contains: User's Guide JavaDoc API Documentation ### Releases Version 1.2 (mirror, bin) Version 1.2 (mirror, source) Version 1.1 Version 1.0 ### Nightly Build Nightly build can be found here .