XML parsing XML document
The use of digester is fairly straightforward, please refer to the comments in the Sampledigester class below, which are not discussed here:
/*============================================================
* Copyright:www.skyinn.org (c) 2002-2003 All rights reserved.
* File:org.skyinn.quasar.config.SampleDigester
* Inculde:sampledigester
* Modify Records
* Date Author Content
* =============================================================
* 2003-5-1 Walker Create class
* ============================================================*/
Package org.skyinn.quasar.config;
Import Org.apache.commons.digester.Digester;
Import org.xml.sax.SAXException;
Import org.skyinn.quasar.action.ActionMapping;
Import java.io.IOException;
/**
* Digester parse XML sample program.
* <p>
* @author Walker (walker@skyinn.org)
* <p>
* <strong> Reference Document:</strong><p>
* <a href= "http://www.onjava.com/pub/a/onjava/2002/10/23/digester.html" target= "_blank" >learning and Using Jakarta digester</a><p>
* <a href= "http://developer.ccidnet.com/pub/disp/Article?columnID=340&articleID=33259&pageNO=1" target = "_blank" > simplifies XML configuration file processing with Digester </a>
*/
public class sampledigester{
Private String configfile;
public void Setconfigfile (final String configfile) {
This.configfile = ConfigFile;
}
/**
* Start parsing.
* <p>
* In this method, new an instance of Digester, and the instance of this class (Sampledigester) is pressed into
*digester the processing stack of the digester, calls the Addcallmethod method of the XML file to place the specific
* nodes are associated with the processing method, and the bucket Addcallparam method sets the parameters and then parses the given XML
File
* @throws IOException IO exception
* @throws saxexception Sax exception
*/
public void Run () throws IOException, saxexception{
New Digester Instance
Digester digester = new Digester ();
This method pushes this (Sampledigester) class to the Digesters
Object stack making its method s available to processing rules.
Digester.push (this);
/*quasar_module/module_info is the node path in the XML file: <quasar_module><module_info>
*addmoduleinfo is a method in this class (see below), that is, when a <quasar_module><module_info> node is encountered
* Call the Addmoduleinfo method, 6 means the method uses six parameters,
*/
Digester.addcallmethod ("Quasar_module/module_info", "Addmoduleinfo", 6);
Set parameters individually, with index 0 of the first parameter
Digester.addcallparam ("Quasar_module/module_info/name", 0);
Digester.addcallparam ("Quasar_module/module_info/description", 1);
Digester.addcallparam ("Quasar_module/module_info/version", 2);
Digester.addcallparam ("Quasar_module/module_info/author", 3);
Digester.addcallparam ("Quasar_module/module_info/mail", 4);
Digester.addcallparam ("Quasar_module/module_info/update_time", 5);
This method starts the parsing of the document.
Digester.parse (This.configfile);
}//end Run ()
/**
* Add module information.
* <p>
* This method will simply output the content in the XML file, and the information obtained can be further processed in practical application.
*
* @param name
* @param Description Description
* @param version
* @param author author
* @param Mail EMAIL
* @param updatetime Update time
*/
public void Addmoduleinfo (final String name,
Final String Description,
Final String version,
Final String author,
Final String Mail,
Final String UpdateTime) {
Output
System.out.println ("name=" + name + ", description=" + description
+ ", version=" + version + ", author=" + author
+ ", mail=" + Mail + ", updatetime=" +updatetime);
}//end Addmoduleinfo ()
/**
* Add an action map.
* <p>
* This method simply outputs the information of the incoming actionmapping and can be added to the System action mapping collection in the application.
* @param actionmapping Action Mapping
*/
public void addactionmapping (final actionmapping actionmapping) {
System.out.println (actionmapping);
}
public static void Main (string[] args) {
Sampledigester sd = new Sampledigester ();
Sd.setconfigfile ("Module.xml");
try{
Sd.run ();
SD = NULL;
}catch (Exception e) {
E.printstacktrace ();
}
//__________________________________________
Demonstrate another method of parsing
Digester digester = new Digester ();
Digester.setvalidating (FALSE);
Raw Cost class instance
Digester.addobjectcreate ("Quasar_module/action_mappings", Sampledigester.class);
Generate Actionmapping Instance
Digester.addobjectcreate ("Quasar_module/action_mappings/action", Actionmapping.class);
Gets the property value and stores it in the actionmapping instance
Digester.addsetproperties ("Quasar_module/action_mappings/action", "name", "name");
Digester.addsetproperties ("Quasar_module/action_mappings/action", "Requestpath", "Requestpath");
Digester.addsetproperties ("Quasar_module/action_mappings/action", "Actionclass", "Actionclass");
Call the Sampledigester addactionmapping method
Digester.addsetnext ("Quasar_module/action_mappings/action", "addactionmapping");
try{
Digester.parse ("Module.xml");
}catch (Exception e) {
E.printstacktrace ();
}
}//end Main ()
}//EOC Sampledigester
