book.xml
<?xml version="1.0" encoding="UTF-8"?>
<book xmlns="http://sauria.com/schemas/apache-xml-book/book"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://sauria.com/schemas/apache-xml-book/book
http://www.sauria.com/schemas/apache-xml-book/book.xsd"
version="1.0">
<title>Professional XML Development with Apache Tools</title>
<author>Theodore W. Leung</author>
<isbn>0-7645-4355-5</isbn>
<month>December</month>
<year>2003</year>
<publisher>Wrox</publisher>
<address>Indianapolis, Indiana</address>
</book>
Book.java
package com.sauria.apachexml.ch1;
public class Book {
String title;
String author;
String isbn;
String month;
int year;
String publisher;
String address;
public String getAddress() {
return address;
}
public String getAuthor() {
return author;
}
public String getIsbn() {
return isbn;
}
public String getMonth() {
return month;
}
public String getPublisher() {
return publisher;
}
public String getTitle() {
return title;
}
public int getYear() {
return year;
}
public void setAddress(String string) {
address = string;
}
public void setAuthor(String string) {
author = string;
}
public void setIsbn(String string) {
isbn = string;
}
public void setMonth(String string) {
month = string;
}
public void setPublisher(String string) {
publisher = string;
}
public void setTitle(String string) {
title = string;
}
public void setYear(int i) {
year = i;
}
public String toString() {
return title + " by " + author;
}
}
BookHandler.java
package com.sauria.apachexml.ch1;
import java.util.Stack;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
public class BookHandler extends DefaultHandler {
private Stack elementStack = new Stack();
private Stack textStack = new Stack();
private StringBuffer currentText = null;
private Book book = null;
public Book getBook() {
return book;
}
public void startElement(
String uri,
String localPart,
String qName,
Attributes attributes)
throws SAXException {
currentText = new StringBuffer();
textStack.push(currentText);
elementStack.push(localPart);
if (localPart.equals("book")) {
String version = attributes.getValue("", "version");
if (version != null && !version.equals("1.0"))
throw new SAXException("Incorrect book version");
book = new Book();
}
}
public void endElement(String uri, String localPart,
String qName)
throws SAXException {
String text = textStack.pop().toString();
if (localPart.equals("book")) {
} else if (localPart.equals("title")) {
book.setTitle(text);
} else if (localPart.equals("author")) {
book.setAuthor(text);
} else if (localPart.equals("isbn")) {
book.setIsbn(text);
} else if (localPart.equals("month")) {
book.setMonth(text);
} else if (localPart.equals("year")) {
int year;
try {
year = Integer.parseInt(text);
} catch (NumberFormatException e) {
throw new SAXException("year must be a number");
}
book.setYear(year);
} else if (localPart.equals("publisher")) {
book.setPublisher(text);
} else if (localPart.equals("address")) {
book.setAddress(text);
} else {
throw new SAXException("Unknown element for book");
}
elementStack.pop();
}
public void characters(char[] ch, int start, int length)
throws SAXException {
currentText.append(ch, start, length);
}
public void warning(SAXParseException ex) throws SAXException {
System.err.println(
"[Warning] " + getLocationString(ex) + ": " +
ex.getMessage());
}
public void error(SAXParseException ex) throws SAXException {
System.err.println(
"[Error] " + getLocationString(ex) + ": " +
ex.getMessage());
}
public void fatalError(SAXParseException ex)
throws SAXException {
System.err.println(
"[Fatal Error] " + getLocationString(ex) + ": " +
ex.getMessage());
throw ex;
}
/** Returns a string of the location. */
private String getLocationString(SAXParseException ex) {
StringBuffer str = new StringBuffer();
String systemId = ex.getSystemId();
if (systemId != null) {
int index = systemId.lastIndexOf('/');
if (index != -1)
systemId = systemId.substring(index + 1);
str.append(systemId);
}
str.append(':');
str.append(ex.getLineNumber());
str.append(':');
str.append(ex.getColumnNumber());
return str.toString();
}
}
SAXMain.java
package com.sauria.apachexml.ch1;
import java.io.IOException;
import org.apache.xerces.parsers.SAXParser;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
public class SAXMain {
public static void main(String[] args) {
XMLReader r = new SAXParser();
BookHandler bookHandler = new BookHandler();
r.setContentHandler(bookHandler);
r.setErrorHandler(bookHandler);
try {
r.parse("book.xml");
System.out.println(bookHandler.getBook().toString());
System.out.println(bookHandler.getBook().getAddress().toString());
} catch (SAXException se) {
System.out.println("SAX Error during parsing " +
se.getMessage());
se.printStackTrace();
} catch (IOException ioe) {
System.out.println("I/O Error during parsing " +
ioe.getMessage());
ioe.printStackTrace();
} catch (Exception e) {
System.out.println("Error during parsing " +
e.getMessage());
e.printStackTrace();
}
}
}
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2004/9/14 17:34:00
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一个使用sax的简单例子
