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电梯直达

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发表于 2004-04-29 14:22 |只看该作者 |倒序浏览

出错信息如下：
Exception in thread "main" java.lang.NoClassDefFoundError: xmldisplay (wrong nam
e: xmlwriter/xmldisplay)
      at java.lang.ClassLoader.defineClass0(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
      at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
      at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
      at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)

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peterbull

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2楼 [报告]

发表于 2004-04-29 14:27 |只看该作者

xml解析程序，class文件生成后，用java运行时报错

原文件如下，附build.xml文件，通过ant编译
xmldisplay.java:
package xmlwriter;
import javax.xml.parsers.*;
import org.w3c.dom.*;

public class xmldisplay {
public static void main(String args[]){
try{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder=factory.newDocumentBuilder();
Document doc=builder.parse("links.xml"

;
doc.normalize();
NodeList links =doc.getElementsByTagName("link"

;
for (int i=0;i<links.getLength();i++){
Element link=(Element) links.item(i);
System.out.print("Content: "

;
System.out.println(link.getElementsByTagName("text"

.item(0).getFirstChild().getNodeValue());
System.out.print("URL: "

;
System.out.println(link.getElementsByTagName("url"

.item(0).getFirstChild().getNodeValue());
System.out.print("Author: "

;
System.out.println(link.getElementsByTagName("author"

.item(0).getFirstChild().getNodeValue());
System.out.print("Date: "

;
Element linkdate=(Element) link.getElementsByTagName("date"

.item(0);
   String day=linkdate.getElementsByTagName("day").item(0).getFirstChild().getNodeValue();
   String month=linkdate.getElementsByTagName("month").item(0).getFirstChild().getNodeValue();
   String year=linkdate.getElementsByTagName("year").item(0).getFirstChild().getNodeValue();
   System.out.println(day+"-"+month+"-"+year);
   System.out.print("Description: ");
   System.out.println(link.getElementsByTagName("description").item(0).getFirstChild().getNodeValue());
   System.out.println();
}
  }catch(Exception e){
e.printStackTrace();
  }

}
}

build.xml:
<?xml version="1.0"?>;

<project name="xmlparse" default="compile" basedir=".">;

;
<property name="src" value="src"/>;
<property name="build" value="build"/>;
<property name="dist" value="dist"/>;

<target name="init">;
;
<tstamp/>;
;
<mkdir dir="${build}"/>;
</target>;

<target name="compile" depends="init">;
;
<javac srcdir="${src}" destdir="${build}"/>;
</target>;

<target name="clean">;
;
<delete dir="${build}"/>;
<delete dir="${dist}"/>;
</target>;

  ;
  <target name = "client">;
<echo>;${java.class.path}</echo>;
<java classname="xmlwriter.xmldisplay" fork="yes">;
   <classpath>;
      <pathelement path="${java.class.path}"/>;
   </classpath>;
</java>;
  </target>;

</project>;