初学xml xslt，我现在用jdom生成xml，然后存储在硬盘中，在进行转换，输出。以下为代码，请问这个过程如何在内存中完成，创建即存在，不调用了则消失。或者说是对动态创建的Document对象进行操作。谢谢
public class DB {
public static void returnValue() {
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try{
Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:3306/test";
conn=DriverManager.getConnection(url, "root", "root");
stmt = conn.createStatement();
String sql="select * from student"; //定义查询的SQL语句
rs=stmt.executeQuery(sql); //执行查询
Document doc = new Document();//创建文档
org.jdom.ProcessingInstruction pi = new ProcessingInstruction("xml-stylesheet","href=\"http://localhost:8081/xmltest/student.xsl\" type=\"text/xsl\"");
doc.addContent(pi);
Element eRoot = new Element("students");
doc.setRootElement(eRoot);
ResultSetMetaData rsmd = rs.getMetaData(); //获取字段名
int numberOfColumns = rsmd.getColumnCount(); //获取字段数
int i=0;
while(rs.next()){ //将查询结果取出
Element eltChild = new Element("student"); //创建元素 生成JDOM树
eRoot.addContent(eltChild);
for (i=2; i<=numberOfColumns;i++)
{ String value = rs.getString(i) ;
// 代码转换
System.out.println(value);
Element eValue = new Element(rsmd.getColumnName(i)).setText(value);
eltChild.addContent(eValue);
}
}
rs.close(); //关闭结果集
stmt.close(); //关闭statement
conn.close(); //关闭连接
Format fmt = Format.getPrettyFormat();
fmt.setEncoding("gb2312");
fmt.setIndent(" ");
XMLOutputter outp = new XMLOutputter();
outp.setFormat(fmt);
outp.output(doc, new FileOutputStream("D:\\tomcat\\apache-tomcat-6.0.13\\webapps\\xmltest\\student.xml")); //输出XML文档
System.out.println("XML 文档生成完毕！");
下面是转换页面：
<%@ page import="java.io.*"%>
<%@ page import="org.jdom.*"%>
<%@ page import="org.jdom.input.*"%>
<%@ page import="org.jdom.output.*"%>
<%@ page import="org.jdom.transform .*"%>
<%@ page import="javax.xml.transform.*"%>
<%@ page import="javax.xml.transform.stream.*"%>
<%@ page import = "bean.DB" %>
<%
DB db = new DB();
db.returnValue();
File _xslFileName=new File("D:\\tomcat\\apache-tomcat-6.0.13\\webapps\\xmltest\\student.xsl");
File _xmlFileName=new File("D:\\tomcat\\apache-tomcat-6.0.13\\webapps\\xmltest\\student.xml");
SAXBuilder _builder=new SAXBuilder();
Document _xmlDOC=_builder.build(_xmlFileName);
TransformerFactory _transFactory = TransformerFactory.newInstance();
Source _xslSource = new StreamSource(_xslFileName);
Transformer _transFormer=_transFactory.newTransformer(_xslSource);
JDOMResult _out = new JDOMResult();
_transFormer.transform(new JDOMSource(_xmlDOC),_out);
XMLOutputter _outputter=new XMLOutputter();
_outputter.output(_xmlDOC,response.getWriter());
%>
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2007/7/11 10:58:00
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请教如何在内存中，完成xslt转换动态生成的xml，谢谢
