关干利用dom操作xml的问题:
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
我在JBuild4.0,(tomcat5.0)已将C:\Tomcat 5.0\common\endorsed\xml-apis.jar导入,然后编写document1.java
我的document1.java程序如下:
package com.deitel.advjhtp1.servlets;
import java.io.*;
import javax.xml.parsers.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.*;
import org.xml.sax.*;
public class document1 {
public document1() {
Document doc;
DocumentBuilder builder;
Element root;
DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
factory.setValidating(true);
try{
builder=factory.newDocumentBuilder();
doc=builder.newDocument();
}catch(ParserConfigurationException pce)
{
pce.printStackTrace();
}
root=doc.createElement("root");
}
}
提示: root=doc.createElement("root");这句话错误
"document1.java": Error #: 553 : variable doc might not have been initialized at line 31, column 9
请高手赐教!!!!
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2005/12/19 16:47:00
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Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();为什么出错??
