我按照书上的代码敲进eclipse,没报错,代码没问题,这个代码的功能是在同目录下建立一个与该java文件同名的xml文件,xml文件里输入了相关数据,但是运行后没反应,本地没生成该xml文件,浴室dos命令运行该java文件,javac编译通过,可是java时却“
F:\eclipse\WorkSpace\xmlupdate\src\xmlupdate>java cratexml
错误: 找不到或无法加载主类 cratexml
F:\eclipse\WorkSpace\xmlupdate\src\xmlupdate>“
报告无法加载主类,这是什么原因,网上说的classpath等配置之类的都没问题。以下是代码:
package xmlupdate;
import java.io.File;
import java.io.FileOutputStream;
import javax.xml.parsers.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
public class cratexml {
public static void main(String [] args){
org.w3c.dom.Document doc;
org.w3c.dom.Element booklist;
org.w3c.dom.Element book;
try{
DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
DocumentBuilder builder=dbf.newDocumentBuilder();
doc=builder.newDocument();
if(doc!=null){
booklist=doc.createElement("图书列表");
book=doc.createElement("图书");
booklist.appendChild(book);
org.w3c.dom.Element isbn = doc.createElement("isbn");
org.w3c.dom.Element name = doc.createElement("name");
org.w3c.dom.Element author = doc.createElement("author");
org.w3c.dom.Element price = doc.createElement("price");
org.w3c.dom.Element num = doc.createElement("num");
book.appendChild(name);
book.appendChild(author);
book.appendChild(price);
book.appendChild(num);
doc.appendChild(booklist);
TransformerFactory transFactory=TransformerFactory.newInstance();
Transformer transformer=transFactory.newTransformer();
DOMSource domSource=new DOMSource();
File file=new File("book.xml");
FileOutputStream out=new FileOutputStream(file);
StreamResult xmlResult=new StreamResult(out);
transformer.transform(domSource, xmlResult);
}
}catch (Exception e){
e.printStackTrace();
}
}
}