SAX解析XML-优快云博客

本文介绍了一个使用SAX解析器解析XML文件的Java示例。该示例通过SAXParserFactory创建SAX解析器，并实现DefaultHandler以处理XML文档中的各种事件。文章展示了如何读取XML文件中的元素、属性及文本内容。

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SAX解析XML

package simpleTest;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.Locator;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.DefaultHandler;
import java.io.IOException;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

class TestSAX extends DefaultHandler {
private StringBuffer buf;

public TestSAX() {
super();
}

public void setDocumentLocator(Locator locator) {
}

public void startDocument() throws SAXException {
buf = new StringBuffer();
System.out.println("*******开始解析文档*******");
}

public void endDocument() throws SAXException {
System.out.println("*******文档解析结束*******");
}

public void startPrefixMapping(String prefix, String uri) {
System.out.println("/n前缀映射: " + prefix + " 开始!" + " 它的URI是:" + uri);
}

public void endPrefixMapping(String prefix) {
System.out.println("/n前缀映射: " + prefix + " 结束!");
}

public void processingInstruction(String target, String instruction)
throws SAXException {
}

public void ignorableWhitespace(char[] chars, int start, int length)
throws SAXException {
}

public void skippedEntity(String name) throws SAXException {
}

public void startElement(String namespaceURI, String localName,
   String qName, Attributes atts) {
System.out.println("*******开始解析元素*******");
System.out.println("元素名" + qName);
for (int i = 0; i < atts.getLength(); i++) {
   System.out.println("元素名" + atts.getLocalName(i) + "属性值"
     + atts.getValue(i));
}
}

public void endElement(String namespaceURI, String localName,
String fullName) throws SAXException {
System.out.println("******元素解析结束********");
}

public void characters(char[] chars, int start, int length)
throws SAXException {
// 将元素内容累加到StringBuffer中
buf.append(chars, start, length);
}

public static void main(String args[]) {
try {

   SAXParserFactory sf = SAXParserFactory.newInstance();
   SAXParser sp = sf.newSAXParser();
   TestSAX testsax = new TestSAX();
   sp.parse(new InputSource(
     "D://test//simpleTest//classes//simpleTest//test.xml"),
     testsax);

} catch (IOException e) {
   e.printStackTrace();
} catch (SAXException e) {
   e.printStackTrace();
} catch (Exception e) {
   e.printStackTrace();
}

}
}

XML文件如下:
<?xml version="1.0" encoding="gb2312"?>
<row>
<person>
<name>王小明</name>
<college>信息学院</college>
<telephone>6258113</telephone>
<notes>男,1955年生,博士，95年调入海南大学</notes>
</person>
</row>