XML基础教程2版第5章的代码代码.doc

第5章SAX解析器5.1 初识SAX解析器例子1example5_1.xml 张小三 男 SAXOne.javaimport org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXOne public static void main(String args) try File file=new File(example5_1.xml); SAXParserFactory factory=SAXParserFactory.newInstance() ; SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(); /事件处理器 saxParser.parse(file,handler); System.out.println(事件处理器处理了+handler.count+个事件); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler int count=0; public void startElement(String uri,String localName,String qName,Attributes atts) System.out.print(); count+; public void endElement(String uri,String localName,String qName) System.out.print(); count+; public void characters(char ch,int start,int length) String text=new String(ch,start,length); System.out.print(text); count+; public void startDocument() System.out.println(开始解析XML文件); count+; public void endDocument() System.out.println(解析过程结束); count+; 5.2 文档开始与结束事件例子2example5_2.xml XML基础教程(第2版) 26元 JSP基础教程(第二版) 28元 SAXTwo.javaimport javax.xml.parsers.*;import org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXTwo public static void main(String args) try File file=new File(example5_2.xml); SAXParserFactory factory=SAXParserFactory.newInstance() ; SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(file); saxParser.parse(file,handler); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler File file; long timeStart=0,timeEnd=0; public EventHandler(File f) file=f; public void startDocument() timeStart=System.currentTimeMillis(); System.out.println(开始解析XML文件); System.out.println(文件长度：+file.length(); public void endDocument() timeEnd=System.currentTimeMillis(); System.out.println(解析过程结束); System.out.println(所用时间：+(timeEnd-timeStart)+毫秒); 5.3 标记开始与结束事件例子3example5_3.xml 北京 华盛顿 SAXThree.javaimport javax.xml.parsers.*;import org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXThree public static void main(String args) try File file=new File(example5_3.xml); SAXParserFactory factory=SAXParserFactory.newInstance() ; factory.setNamespaceAware(true); SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(); saxParser.parse(file,handler); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler int count=0; public void startElement(String uri,String localName, String qName,Attributes atts) count+; System.out.print(+qName+ ); for(int k=0;k); if(uri.length()0) System.out.println(标记隶属的名称空间是+uri); public void endElement(String uri,String localName,String qName) System.out.println(); public void endDocument() System.out.printf(n解析过程结束,共有%d个标记,count); 5.4 文本事件例子4example5_4.xml 张三 清华大学 李四 北京大学 SAXFour.javaimport javax.xml.parsers.*;import org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXFour public static void main(String args) try File file=new File(example5_4.xml); SAXParserFactory factory=SAXParserFactory.newInstance() ; SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(); saxParser.parse(file,handler); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler int textEventCount; public void characters(char ch,int start,int length) textEventCount+; String text=new String(ch,start,length); text=text.trim(); if(text.length()=0) System.out.println(第 +textEventCount+ 次文本事件处理的文本是空白字符); else System.out.println(第 +textEventCount+ 次文本事件处理的文本是+text+); 例子5example5_5.xml 张三 89 77 李四 92 65 SAXFive.javaimport javax.xml.parsers.*;import org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXFive public static void main(String args) try File file=new File(example5_5.xml); SAXParserFactory factory=SAXParserFactory.newInstance() ; SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(); saxParser.parse(file,handler); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler boolean isComputabled,math,english; int count; double mathSum,englishSum,personSum; StringBuffer numberContent,otherContent; public void startElement(String uri,String localName, String qName,Attributes atts) numberContent=new StringBuffer(); otherContent=new StringBuffer(); System.out.print(); if(qName.endsWith(成绩) isComputabled=true; if(qName.startsWith(数学) math=true; if(qName.startsWith(英语) english=true; if(qName.equals(学生) personSum=0; count+; public void characters(char ch,int start,int length) String text=new String(ch,start,length); if(isComputabled=true) numberContent.append(text); System.out.print(text); public void endElement(String uri,String localName,String qName) System.out.print(); if(isComputabled) String numberStr=new String(numberContent); numberStr=numberStr.trim(); double d=Double.parseDouble(numberStr); personSum=personSum+d; if(math) mathSum=mathSum+d; if(english) englishSum=englishSum+d; isComputabled=false; math=false; english=false; if(qName.equals(学生) System.out.print(该学生的总成绩：+personSum); public void endDocument() System.out.println(); System.out.println(共有+count+名学生); System.out.println(数学平均成绩：+mathSum/count); System.out.println(英语平均成绩：+englishSum/count); 5.5名称空间事件例子6example5_6.xml Java 程序设计 JSP 程序设计 Java 程序设计 JSP 程序设计 SAXSix.javaimport javax.xml.parsers.*;import org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXSix public static void main(String args) try File file=new File(example5_6.xml); SAXParserFactory factory=SAXParserFactory.newInstance() ; factory.setNamespaceAware(true); SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(); saxParser.parse(file,handler); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler int count=0; String uri; public void startPrefixMapping(String prefix,String uri) count+; System.out.print(前缀:+prefix+ ); System.out.println(名称空间的名称:+uri); public void characters(char ch,int start,int length) String text=new String(ch,start,length); if(uri!=null&uri.equals(清华大学出版社) System.out.print(text); public void startElement(String uri,String localName, String qName,Attributes atts) this.uri=uri; if(uri.equals(清华大学出版社) System.out.print(); public void endElement(String uri,String localName,String qName) if(uri.equals(清华大学出版社) System.out.println(); public void endDocument() System.out.println(解析过程结束,报告了+count+次名称空间); 5.6 错误事件例子7sevenDTD.dtdexample5_7.xml 电视机 2010-12-20 5676 元/台 洗衣机 6686 元/台 2009-10-19 SAXSeven.javaimport javax.xml.parsers.*;import org.xml.sax.helpers.*;import org.xml.sax.*;import java.io.*;public class SAXSeven public static void main(String args) try File file=new File(example5_7.xml); SAXParserFactory factory=SAXParserFactory.newInstance(); factory.setNamespaceAware(true); factory.setValidating(true); SAXParser saxParser=factory.newSAXParser(); EventHandler handler=new EventHandler(); saxParser.parse(file,handler); catch(Exception e) System.out.println(e); class EventHandler extends DefaultHandler public void warning(SAXParseException e)throws SAXException String warningMessage=e.getMessage(); int row=e.getLineNumber(); int colums=e.getColumnNumber(); System.out.println(警告：+warningMessage+位置：+row+,+colums); System.out.println(publicId:+e.getPublicId(); System.out.println(systemId:+e.getSystemId(); public void error(SAXParseException e) throws SAXException String errorMessage=e.getMessage(); int row=e.getLineNumber(); int colums=e.getColumnNumber(); System.out.println(一般错误：+errorMessage+位置：+row+,+colums); System.out.println(publicId:+e.getPublicId(); System.out.println(systemId:+e.getSystemId(); public void fatalError(SAXParseException e) throws SAXException String fatalErrorMessage=e.getMessage(); int row=e.getLineNumber(); int colums=e.getColumnNumber(); System.out.println(致命错误：+fatalErrorMessage+位置：+row+,+colums); System.out.println(publicId:+e.getPublicId(); System.out.println(systemId:+e.getSystemId(); throw new SAXException(致命错误，停止解析); public void startDocument() System.out.println(开始解析XML文件); public void endDocument() System.out.println(解析过程结束); public void startElement(String uri,String localName, String qName,Attributes atts) System.out.print(); public void endElement(String uri,String localName,String qName) System.out.print(); public void characters(char ch,int start,int length) String text=new String(ch,start,length); System.out.print(text); public void ignorableWhitespace(char ch,int start,int length) String text=new String(ch,start,length); System.out.print(text); 5.7 处理空白例子8SAXEight.javaimport javax.xml.par