微信开发中用dom4j解析消息时的错误

我用dom4j解析微信xml消息时用这种方法

Document document = reader.read(inputStream);

他报错Error on line 1 of document : The root element is required in a well-formed document. Nested exception: The root element is required in a well-formed document.通过分析我感就是(如果我错了请兄弟们指出)用SAXReader他会严格检查xml头部但是微信回复消息如下

<xml>
<ToUserName><![CDATA[toUser]]></ToUserName>
<FromUserName><![CDATA[fromUser]]></FromUserName>
<CreateTime>1348831860</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[this is a test]]></Content>
<MsgId>1234567890123456</MsgId>
</xml>

一点都不标准，但是可以采用下面的方法

// 将解析结果存储在HashMap中
Map<String, String> map = new HashMap<String, String>();
// 从request中取得输入流
InputStream inputStream = request.getInputStream();
// 一定要utf-8
InputStreamReader inputReader = new InputStreamReader(inputStream,
"UTF-8");
BufferedReader buffer = new BufferedReader(inputReader);
String message = "";
String s = "";
while ((s = buffer.readLine()) != null) {
message += s;
}
System.out.println(message);
System.out.println("获取输入流");
// // 读取输入流
SAXReader reader = new SAXReader();
//       Document document = reader.read(inputStream);
// 将字符串转化为XML文档对象
Document document = DocumentHelper.parseText(message);
Element root = document.getRootElement();
List<Element> elements = root.elements();
// 遍历根节点下所有子节点
Iterator<?> iter = root.elementIterator();

// // 遍历所有子节点
// for (Element e : elementList) {
// System.out.println(e.getName() + "|" + e.getText());
// map.put(e.getName(), e.getText());
// }
while (iter.hasNext()) {
Element ele = (Element) iter.next();
map.put(ele.getName(), ele.getText());

}
// 释放资源
inputStream.close();