。。。。

本帖最后由 ptwhite 于 2010-09-21 15:09:34 编辑

解决方案 »

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public static void main(String[] args)
{ try
{
String uri = "book.xml";
ArrayList list = getBookList(uri);
FileWriter fs = new FileWriter("newbook.xml");
fs.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
fs.write("\n<books>");
for (int i = 0; i < list.size(); i++)
{
Book book = (Book) list.get(i);
fs.write("\n    <book>\n");
if (book.getTitle() != null)
{
fs.write("<title>");
fs.write(book.getTitle());
System.out.println(book.getTitle());
fs.write("</title>\n");
}
if (book.getAuthor() != null)
{
fs.write("<author>");
fs.write(book.getAuthor());
fs.write("</author>\n");
}
if (book.getPrice() != null)
{
fs.write("<price>");
fs.write(book.getPrice());
fs.write("</price>\n");
}
fs.write("    </book>\n");
}
fs.write("</books>");
fs.close();
} catch (IOException ioe)
{
System.out.println(ioe.getMessage());
} }<?xml version="1.0" encoding="UTF-8"?>
<books>
<book>
<title>面向对象设计</title>
<author>张三</author>
<price>50.00</price>
</book>
<book>
<title>Oracle数据库</title>
<author>李四</author>
<price>78.00</price>
</book>
<book>
<title>征服AJAX2.0</title>
<author>王五</author>
<price>58.00</price>
</book>
</books>
     我的意思是在原来的XML文件里进行增、删、改操作，并不是新建一个XML文件
public static void writeDocument(String filename, Document document) throws FileNotFoundException, IOException
{
writeDocument(new File(filename), document);
} public static void writeDocument(File outFile, Document document) throws FileNotFoundException, IOException
{
if (null == document) return;
if (null == outFile) return;
FileOutputStream fos = new FileOutputStream(outFile);
writeDocument(fos, document);
if (fos != null) fos.close();
} public static void writeDocument(OutputStream os, Document document) throws IOException
{
if (null == document) return;
if (null == os) return;
synchronized (lockObj)
{
OutputFormat format = new OutputFormat(document);
format.setIndent(4);
format.setPreserveSpace(false);
format.setPreserveEmptyAttributes(true);
format.setLineWidth(Integer.MAX_VALUE);
XMLSerializer serializer = new XMLSerializer(os, format);
serializer.asDOMSerializer();
serializer.serialize(document.getDocumentElement());
}
}
这是JAVA自带的W3C 的XML实现的示例.
   我需要的是DOM对XML的操作，并且更新到文件....