public class Test {
  public Test() {
  }
  public static void main(String []args) throws Exception{
    SAXReader reader = new SAXReader();
    Document doc = null;
    doc = reader.read("test.xml");
    OutputFormat format = OutputFormat.createPrettyPrint();
    format.setEncoding("gb2312");
    XMLWriter output = new XMLWriter(new FileOutputStream("test2.xml"),format);
    System.out.println("Done!");
    output.write(doc);
    output.close();
  }
}

要处理的xml文件是：
<?xml version="1.0" encoding="GB2312"?>
<root>
        <paragraph id="c0">
                1、式Ⅳ化合物及其可药用盐：
        </paragraph>
        <paragraph id="d83">
                10  3  1  10  15
        </paragraph>
</root>

是用上面的程序得到的结果成了：
<?xml version="1.0" encoding="gb2312"?>

<root>
  <paragraph id="c0">1、式Ⅳ化合物及其可药用盐：</paragraph>
  <paragraph id="d83">10??3??1??10??15</paragraph>
</root>

求教&#xxx;这样的如何处理?