JDK Tutorials - Herong's Tutorial Examples - v6.32, by Herong Yang
SAX (Simple API for XML) Implementation in JDK
This section provides a tutorial example on how to write a simple program to find out what are the implementation classes for the SAX interfaces in JDK. The key is to call the javax.xml.parsers.SAXParserFactory.newInstance() method.
What is SAX (Simple API for XML)? SAX is an Application Programming Interface (API) that allows the parser to fire events based on the XML structure while parsing an XML file. It allows application programs to process the contents of the XML by handling the events fired by the parser.
SAX has been implemented in Java in J2SDK 1.4.1_01, which is already installed on my system. So I am ready to play with XML files through SAX in Java.
The first task is to find out how JDK supports SAX. To do this, I wrote this simple program here, SAXClassChecker.java, to show what are the implementation classes for the SAX interfaces:
/* SAXClassChecker.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.io.File; import java.io.IOException; import javax.xml.parsers.SAXParserFactory; import javax.xml.parsers.SAXParser; import javax.xml.parsers.ParserConfigurationException; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.SAXException; class SAXClassChecker { public static void main(String[] args) { try { File x = new File(args[0]); SAXParserFactory f = SAXParserFactory.newInstance(); System.out.println(f.toString()); SAXParser p = f.newSAXParser(); System.out.println(p.toString()); DefaultHandler h = new DefaultHandler(); System.out.println(h.toString()); p.parse(x,h); } catch (ParserConfigurationException e) { System.out.println(e.toString()); } catch (SAXException e) { System.out.println(e.toString()); } catch (IOException e) { System.out.println(e.toString()); } } }
Run the program with JDK 1.8 or higher, you will get:
herong> java SAXClassChecker.java hello.xml com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl@1db9742 com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl@106d69c org.xml.sax.helpers.DefaultHandler@52e922
Note that:
If you are using JDK 1.4.1, the output should look like:
herong> \j2sdk1.4.1_01\bin\java SAXClassChecker hello.xml org.apache.crimson.jaxp.SAXParserFactoryImpl@1c78e57 org.apache.crimson.jaxp.SAXParserImpl@1e63e3d org.xml.sax.helpers.DefaultHandler@1be2d65
Table of Contents
Date, Time and Calendar Classes
Date and Time Object and String Conversion
Number Object and Numeric String Conversion
Locales, Localization Methods and Resource Bundles
Calling and Importing Classes Defined in Unnamed Packages
HashSet, Vector, HashMap and Collection Classes
Character Set Encoding Classes and Methods
Encoding Conversion Programs for Encoded Text Files
Datagram Network Communication
DOM (Document Object Model) - API for XML Files
►SAX (Simple API for XML) Implementation in JDK
SAXBrowser.java - SAX Based XML Browser
DTD (Document Type Definition) - XML Validation
XSD (XML Schema Definition) - XML Validation
XSL (Extensible Stylesheet Language)
Message Digest Algorithm Implementations in JDK
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Digital Signature Algorithm and Sample Program
"keytool" Commands and "keystore" Files
KeyStore and Certificate Classes
Secret Key Generation and Management
Cipher - Encryption and Decryption
The SSL (Secure Socket Layer) Protocol
SSL Socket Communication Testing Programs