java实现手机短信验证的基本思路

function sendCaptcha(tel) {      console.log("sendCaptcha: tel = " + tel);      $.ajax({        type: 'post',        url: '/sms/captcha/' + tel,        dataType: "json",        success: function (data) {          console.log("sendCaptcha ==> success: data = " + eval(data));          if (data) {            countdown();            b_code = false;          } else {            alert("您发送的频率过快!");          }        },        error: function (data) {          console.log("sendCaptcha ==> error: data = " + eval(data));          alert("网络超时");          clearTimeout(t);          b_code = true;          var msg = "获取验证码";          $("#code").text(msg);          c = 60;        }      });    }  

@RequestMapping(value = "captcha/{recPhoneNum}", method = RequestMethod.POST)    public Object getSmsCaptcha(ModelMap model, @PathVariable("recPhoneNum")String recPhoneNum) {      String responseBody = null;      /* 这里验证手机号是否被注册 */   // 生成验证码    String captcha = Generator.generateCaptcha();     // 第三方短信通信接口参数设置   req.setReceive(recPhoneNum);    try {       // 发送请求      responseBody = req.send();     // 将验证码放入session      model.addAttribute("captcha", captcha);       // 得到结果      responseBody = rsp.getBody();        log.debug("getSmsCaptcha: responseBody = " + responseBody);        if (rsp.getResult() != null) {          model.addAttribute("success_response", rsp.getResult());        } else {          model.addAttribute("error_response", rsp.getSubMsg());        }      } catch (ApiException e) {        log.error("getSmsCaptcha :" + e.getErrMsg());      }      // 解析结果    if (successJson != null) {        successJson = successJson.getJSONObject("result");        return successJson.getBoolean("success");      } else {        return false;      }    }  

// 从session取出验证码String captcha = session.getAttribute("captcha");// 比较if (reqCaptcha.equals(captcha))// 相同通过，则无效化验证码session.setAttribute("captcha", null);else// 不通过并提示无效验证码