java操作xml

将对象转换成xml，需要先导入XStream jar包，下载地址：http://x-stream.github.io/download.html

XStream xs = new XStream();
String xmlStr= xs.toXML(obj);

将对象转换成xml，并用流输出

XStream xs = new XStream();
xs.toXML(obj,outputStream);

将xml输入流转换成map，需要先导入dom4j jar包，下载地址：https://sourceforge.net/projects/dom4j/files

Map<String, String> map = new HashMap<String, String>();
SAXReader sr = new SAXReader();
Document doc = null;
try {
　　doc = sr.read(inputStream);
} catch (DocumentException e) {
　　e.printStackTrace();
}
Element root = doc.getRootElement();
List<Element> elements = root.elements();
for (Element element : elements) {
　　map.put(element.getName(), element.getText());
}

 xml输入流转String

SAXReader sr = new SAXReader();
Document doc = null;
try {
     doc = sr.read(is);
} catch (DocumentException e) {
      e.printStackTrace();
}
return doc.getRootElement().asXML();

String形式xml转map

Document doc = null;
try {
    doc = DocumentHelper.parseText(xml);
} catch (DocumentException e) {
    e.printStackTrace();
}

Element root = doc.getRootElement();

List<Element> elements = root.elements();
Map<String, String> map = new HashMap<String, String>();
for (Element element : elements) {
    map.put(element.getName(), element.getText());
}
return map;