关于sax读取XML文件的内容？

Question

晕倒，原来是；
public void characters(char ch[], int start, int length)
{
     String content=new String(ch,start,length);
     System.out.println("content:"+content);
}
没有看清楚。不好好学习，都是我的错。

Answer 1

text.xml (你的节点不匹配)
<?xml version="1.0" encoding="GB2312"?>
<column>
    <name>大家好</name>
    <colposition>第五列</colposition>
    <rowposition>第四行</rowposition>
</column>ControlXml.java(两个文件，放在一级目录下，我已经测试过)import java.io.IOException;
import java.io.PrintStream;
import java.util.Vector;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;public class ControlXml {
    String fileName;
    public void parseXml(String fileName){    
     try{
        DocumentBuilderFactory documentbuilderfactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder documentbuilder = documentbuilderfactory.newDocumentBuilder();
        Document document = documentbuilder.parse(fileName);
        document.normalize();        
        NodeList nodelist = document.getElementsByTagName("column");
for( int i=0;i<nodelist.getLength();i++){
Element node1=(Element) nodelist.item(i);
System.out.println(node1.getElementsByTagName("name").item(0).getFirstChild().getNodeValue());
System.out.println(node1.getElementsByTagName("colposition").item(0).getFirstChild().getNodeValue());
System.out.println(node1.getElementsByTagName("rowposition").item(0).getFirstChild().getNodeValue());
}

        }catch(ParserConfigurationException e){
         System.out.println(e);
    }catch(IOException e){
     System.out.println(e);
    }catch(SAXException e){
     System.out.println(e);
    }    }
//* //测试用
public static void main(String[] args) {
ControlXml temp = new ControlXml();
temp.parseXml("text.xml");
}
//*/
}

Answer 2

1.xml
<?xml version="1.0" encoding="UTF-8"?>
<CONDIG DEFAULT="QSYK" DEBUG="true">
  <ORACLE>
    <CLASS>oracle.jdbc.driver.OracleDriver</CLASS>
    <URL>jdbc:oracle:thin:@83.24.19.11:1521:htjs</URL>
    <USER>htjs</USER>
    <PASSWORD>htjs</PASSWORD>
  </ORACLE>  <QSYK>
    <CLASS>oracle.jdbc.driver.OracleDriver</CLASS>
    <URL>jdbc:oracle:thin:@83.24.19.18:1521:qsyk</URL>
    <USER>sa</USER>
    <PASSWORD>sa</PASSWORD>
  </QSYK>  <SYBASE>
    <CLASS>com.sybase.jdbc2.jdbc.SybDriver</CLASS>
    <URL>jdbc:sybase:Tds:10.10.10.8:5000/htjs</URL>
    <USER>HTJS</USER>
    <PASSWORD>123456</PASSWORD>
  </SYBASE>
</CONDIG>
2.java
package com.htjs.xml;/**
 * <p>Title: PBGATE</p>
 * <p>Description: PbGate Application</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: htjs</p>
 * @author yang juan
 * @version 1.0
 * @modified by Bie Guoqiao At 2003.06.10
 */import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;public class parse_xml {
        private Document doc = null;
        public parse_xml()
        {
        }
        /**
         * 读取节点值
         * @param mynodelist 目标节点
         * @return String
         */
        private String readnode(NodeList mynodelist){
          String mynode="";
          if (mynodelist.getLength() == 1) {
                 Element e = (Element) mynodelist.item(0);
                Text t = (Text) e.getFirstChild();
                mynode=t.getNodeValue();
        }
          return mynode;
        }        /**
         * 初始化XML文件类
         * @param inFile XML文件
         * @throws Exception
         */
        public void readXMLFile(String inFile) throws Exception {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = null;
        try {
                db=dbf.newDocumentBuilder();
        } catch (ParserConfigurationException pce) {
                System.err.println(pce);
        }        doc = null;
        try {
                doc = db.parse(inFile);
        } catch (DOMException dom) {
                System.err.println(dom.getMessage());
        } catch (IOException ioe) {
                System.err.println(ioe);
        }
        }        /**
         * 取得XML文件的根节点
         * @return Element
         */
        public Element getRoot()
        {
                if (doc==null) return null;
                return doc.getDocumentElement();
        }        /**
         * 取得元素属性
         * @param e1 元素
         * @param name 属性名称
         * @return String
         */
        public String getAttribute(Element e1,String name)
        {
                 return e1.getAttribute(name);
        }        /**
         * 取得元素值
         * @param parent 父元素
         * @param name 元素名称
         * @return String
         */
        public String getValue(Element parent,String name)
        {
                NodeList myclass = parent.getElementsByTagName(name);
                return readnode(myclass);
        }        /**
         * 按名称取得元素对象
         * @param parent 父元素
         * @param name 元素名称
         * @return Element
         */
        public Element getElement(Element parent,String name)
        {
                return (Element)parent.getElementsByTagName(name).item(0);
        }
        public static void main(String[] args) {
        try{
          System.out.println("开始读Input.xml文件");
          parse_xml xmlTest = new parse_xml();
          xmlTest.readXMLFile("system.xml");
          Element root=xmlTest.getRoot();
          System.out.println(xmlTest.getAttribute(root,"DEFAULT"));
          Element a=(Element)xmlTest.getElement(root,"ORACLE");
          System.out.println(xmlTest.getValue(a,"CLASS"));
          System.out.println(xmlTest.getValue(a,"URL"));
          System.out.println(xmlTest.getValue(a,"USER"));
          System.out.println(xmlTest.getValue(a,"PASSWORD"));
          System.out.println("完成");
          }catch (Exception ne)
          {
            System.out.print(ne);
          }
  }}