微信被动回复用户消息-文本消息-springmvc环境下自动生成xml

private Object subscribeMessage(Scan scan) {
Scan reply = new Scan();
reply.setToUserName(scan.getFromUserName());
reply.setFromUserName(scan.getToUserName());
reply.setCreateTime((int) (Calendar.getInstance().getTimeInMillis() / 1000) );
reply.setMsgType("text");
reply.setContent("欢迎订阅。");
return reply;
}

@XmlRootElement(name="xml")
@XmlAccessorType(XmlAccessType.FIELD)
public class Scan {
private Integer id;

@XmlElement(name="ToUserName")
private String toUserName;

@XmlElement(name="FromUserName")
private String fromUserName;

@XmlElement(name="CreateTime")
private Integer createTime;

......

@RequestMapping(value="message" )
@ResponseBody
public Object weixinCreate(@RequestBody Scan scan, HttpServletResponse response){

if("text".equals(scan.getMsgType())){
return textMessage(scan);
}