JDOM中如何插入这么一条东西？

Question

ProcessingInstruction pi = new ProcessingInstruction ("xml-stylesheet","href=\"bookList.html.xsl\" type=\"text/xsl\"");        doc.addContent(pi);

Answer 1

//加入一条处理指令        
ProcessingInstruction pi = new ProcessingInstruction 
           ("xml-stylesheet","href=\"bookList.html.xsl\" type=\"text/xsl\""); 
       doc.addContent(pi);

Answer 2

我想生成这样的文件
<?xml version="1.0" encoding="UTF-8"?>
<?stylesheet href="treefunc.xsl" type="text/xsl"?>
<root />但用以上的方法出来的都是<?xml version="1.0" encoding="UTF-8"?>
<root />
<?stylesheet href="treefunc.xsl" type="text/xsl"?>请指点！

Answer 3

其实这条指令加在头和尾都一样！都是在根节点之外！
至于为什么JDOM把它加在尾部我也不知道！！没有时间去更深入研究！

Answer 4

package com.test.csdn.xml;public class TestAddPI
{
    static String xmlContent;
    public static void init()
    {
        xmlContent = "<?xml version=\"1.0\" encoding=\"GB2312\"?>"
            + "<lib>"
            + "<book>"
            + "<name>Java</name>"
            + "</book>"
            + "<book>"
            + "<name>XML</name>"
            + "<pubdate>2002-10-07</pubdate>"
            + "</book>"
            + "</lib>";
    }    public static void outputXml()
    {
        try
        {
            org.jdom.input.SAXBuilder sb = new org.jdom.input.SAXBuilder();
            org.jdom.Document doc = sb.build(new java.io.
                                             StringBufferInputStream(xmlContent));
            org.jdom.output.XMLOutputter outer = new org.jdom.output.XMLOutputter();
//<?stylesheet href="treefunc.xsl" type="text/xsl"?>
            java.util.Map map = new java.util.HashMap();
            map.put("href","treefunc.xsl");
            map.put("type","text/xsl");
            doc.addContent(new org.jdom.ProcessingInstruction("AA","BB"));
            doc.addContent(new org.jdom.ProcessingInstruction("CC","DD"));
            doc.addContent(new org.jdom.ProcessingInstruction("stylesheet",map));            java.io.StringWriter sw = new java.io.StringWriter();
            org.jdom.filter.ContentFilter piFilter = new org.jdom.filter.ContentFilter(
                org.jdom.filter.ContentFilter.PI );
            org.jdom.filter.ContentFilter dFilter = new org.jdom.filter.ContentFilter(
                org.jdom.filter.ContentFilter.ELEMENT );            outer.output(doc.getContent(piFilter),sw);
            outer.output(doc.getContent(dFilter),sw);
            sw.close();
            System.out.println(sw.toString());
            //Debug.printTextAsXml(sw.toString());
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }    public static void main(String[] args)
    {
        init();
        outputXml();
    }
}