<div class="form-group has-feedback">
 <input type="tel" class="form-control" id="phone" placeholder="请输入手机号" maxlength=11>
 <span class="glyphicon glyphicon-earphone form-control-feedback"></span>
</div>
<div class="row">
 <div class="col-xs-6 pull_left">
  <div class="form-group">
   <input class="form-control" id="msg_num" placeholder="请输入验证码">
  </div>
 </div>
 <div class="col-xs-6 pull_center">
  <div class="form-group">
   <input type="button" class="btn btn-block btn-flat" id="verify_refresh" onclick="getMsgNum(this)" value="免费获取验证码">
  </div>
 </div>
</div>
<div class="col-xs-12 pull_center">
 <button type="button" class="btn btn-block btn-flat" onclick="validateNum()">验证</button>
</div>

var messageData;
var wait = 120; // 短信验证码120秒后才可获取下一个
/**
 * 获取验证码
 * @param that
 */
function getMsgNum(that) {
 var phoneNumber = $('#phone').val();
 setButtonStatus(that); // 设置按钮倒计时
 var obj = {
  phoneNumber: phoneNumber
 };
 $.ajax({
  url: httpurl + '/sendMsg', // 后台短信发送接口
  type: 'POST',
  dataType: 'json',
  contentType: "application/json",
  async: false, //false 同步
  data: JSON.stringify(obj),
  xhrFields: {
   withCredentials: true
  },
  success: function (result) {
   if(result.code == '200') {
    messageData = result.data;
   }else {
    alert("错误码:" + data.code + " 错误信息:" + data.message);
   }
  },
  error: function (XMLHttpRequest, textStatus, errorThrown) {
   console.log(XMLHttpRequest.status);
   console.log(XMLHttpRequest.readyState);
   console.log(textStatus);
  }
 });
}
/**
 * 设置按钮状态
 */
function setButtonStatus(that) {
 if (wait == 0) {
  that.removeAttribute("disabled");
  that.value="免费获取验证码";
  wait = 60;
 } else {
  that.setAttribute("disabled", true);
  that.value=wait+"秒后可以重新发送";
  wait--;
  setTimeout(function() {
   setButtonStatus(that)
  }, 1000)
 }
}
/**
* 注册按钮
*/
function validateNum() {
 var data = {
  msgNum: inputMsgNum,
  tamp: messageData.tamp,
  hash: messageData.hash
 };
 $.ajax({
  url: httpurl + '/validateNum', // 验证接口
  type: 'POST',
  dataType: 'json',
  contentType: "application/json",
  data: JSON.stringify(data),
  async: false, //false 同步
  success: function (data) {
   //业务处理
  },
  error: function (XMLHttpRequest, textStatus, errorThrown) {
   console.log(XMLHttpRequest.status);
   console.log(XMLHttpRequest.readyState);
   console.log(textStatus);
  }
 });
}

private static final String KEY = "abc123"; // KEY为自定义秘钥
@RequestMapping(value = "/sendMsg", method = RequestMethod.POST, headers = "Accept=application/json")
public Map<String, Object> sendMsg(@RequestBody Map<String,Object> requestMap) {
String phoneNumber = requestMap.get("phoneNumber").toString();
String randomNum = CommonUtils.createRandomNum(6);// 生成随机数
SimpleDateFormat sf = new SimpleDateFormat("yyyyMMddHHmmss");
Calendar c = Calendar.getInstance();
c.add(Calendar.MINUTE, 5);
String currentTime = sf.format(c.getTime());// 生成5分钟后时间，用户校验是否过期
sengMsg(); //此处执行发送短信验证码方法
String hash = MD5Utils.getMD5Code(KEY + "@" + currentTime + "@" + randomNum);//生成MD5值
Map<String, Object> resultMap = new HashMap<>();
resultMap.put("hash", hash);
resultMap.put("tamp", currentTime);
return resultMap; //将hash值和tamp时间返回给前端
}
@RequestMapping(value = "/validateNum", method = RequestMethod.POST, headers = "Accept=application/json")
public Map<String, Object> validateNum(@RequestBody Map<String,Object> requestMap) {
String requestHash = requestMap.get("hash").toString();
String tamp = requestMap.get("tamp").toString();
String msgNum = requestMap.get("msgNum").toString();
String hash = MD5Utils.getMD5Code(KEY + "@" + tamp + "@" + msgNum);
if (tamp.compareTo(currentTime) > 0) {
if (hash.equalsIgnoreCase(requestHash)){
//校验成功
}else {
//验证码不正确，校验失败
}
} else {
// 超时
}
}