java中的SAXParser.parse方法在eclipse中不工作Mars

Question

我遵循在线教程，并创建了2个类（子类和主类），通过扩展DefaultHandler类来使用SAX解析器读取XML文件。一切都很好，但是当我尝试在Eclipse中编写方法SAXParser.parse(String URI, DefaultHandler object)时，它显示下面的错误图像。 请帮助我在这里做错了什么。

public class mainclass{ 
public static void main(String []args) 
{ 
     DefaultHandler dff=new subclass(); 
     SAXParserFactory spf=SAXParserFactory.newInstance(); 
     try 
     { 
     SAXParser sp=spf.newSAXParser(); 
     sp.parse("Trial.xml", dff); 
    } 
    catch(Exception e) 
    { 
     System.out.println("exception is "+e); 
    } 
} 
} 

public class subclass extends DefaultHandler{ 
boolean bheader=false; 
boolean bdetail=false; 
boolean blpn=false; 

public void startDocument() throws SAXException 
{ 
    System.out.println("Starting the start document method"); 
} 
public void endDocument() throws SAXException 
{ 
    System.out.println("End document method called"); 
} 
public void startElement(String uri,String localName,String qName,Attributes attributes) throws SAXException 
{ 
    System.out.println("Start element method called "+qName); 
} 
public void endElement(String uri,String localName,String qName) throws SAXException 
{ 
    System.out.println("end element method called "+qName); 
} 
public void characters(char ch[],int start,int length) 
{ 
    System.out.println("Characters method called "+new String(ch,start,length)); 
} 
} 

Answer 1

你是从错误的包导入DefaultHandler类。你应该导入org.xml.sax.helpers.DefaultHandler