项目做了登录改密功能需要验证码的功能.
思路:页面点击获取验证码按钮,发送请求到后台,携带用户名作为参数.后台做一个servlet查询该用户的手机号.生成随机验证码.将验证码(+消息)+tel作为参数+其他接口参数拼成url调用第三方服务(云信).
实现:
1.页面js方法
function get_code_time(){ var uname = $("#uname").val(); if(!uname){ $("#users").html("请先输入您的用户名！");//提示信息 }else{ var data="uname="+uname; $.get("sendCodes",{uname:uname},function(data){ code_time();//记时方法
//根据servlet返回的json判断短信发送状态 if(data=="0"){ alert("短信验证码发送失败,请重新获取"); }else if(data=="1"){ alert("用户名未注册"); }else if(data=="2"){ alert("用户名无效或手机号未注册"); }else if(data=="3"){ alert("短信发送成功"); }else if(data=="4"){ alert("验证码超时"); } }); } }
var wait = 60;
function code_time(){
// alert(567);
if(wait==0){
$("#codes").removeAttr("disabled");//移除获取验证码按钮的disabled属性
$("#codes").val("重新获取验证码");
$("#msgs").val("");
wait =60;
}else{
$("#codes").attr("disabled", true);//设置获取验证码按钮为不可触发
$("#codes").val("(" + wait + ")秒后获取验证码");
wait--;
setTimeout("code_time()", 1000);
}
}
2.后台servlet:servlet的路径是上面js方法中的sendCodes
public class SendCodes extends HttpServlet { @Override protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String ret="",uname="",tel = ""; uname=request.getParameter("uname"); //判断用户名是否为空 if(uname==null || "".equals(uname)){ response.getWriter().write("1"); return; } //通过用户名找到电话号码 String sql = "select ccu.tel from table_user tu where tu.user_name= ? "; Session session = new Session(EcConnection.get());//自己封装的获取数据库连接的方法 try{ tel = session.queryForColumn(String.class, sql, uname); }catch (Exception e) { e.printStackTrace(); }finally{ session.close(); }//手机号为空2 if (tel==null || "".equals(tel)) { response.getWriter().write("2"); return; } //生成验证码 int Random = (int) ((Math.random()*9+1)*100000);//随机生成的6位数（验证码） //发送到手机 //SMSTest sms=new SMSTest(); String mes= "您的验证码："+String.valueOf(Random)+",有效时间5分钟" ; String msg = ""; try { //由于服务器不能解析调用发送短信接口拼接的url,
//发送短信,调另一服务,其实就是一个servlet,访问返回的是调用短信接口的发送状态码, Map<String, String> paraMap = new HashMap<String, String>(); paraMap.put("mes", mes); msg = HttpClient.post("http://127.0.0.1:8082/SendSms/semdsms?tel="+tel, paraMap);//自己封装的httpClientpost方法,下面粘代码 System.out.println(msg); //如果返回的是错误服务错误信息 if("发送短信错误".equals(msg)){ response.getWriter().write("0"); return; } }catch (Exception e) { e.printStackTrace(); response.getWriter().write("0"); return; } //新建一个实体类对象，把它做为一个容器来放验证码，帐号和收取验证码时间。服务不关闭，或是30分钟后就登陆无效 SmsMessageBean b = new SmsMessageBean(uname,Random+"",System.currentTimeMillis()); EcContainer.RandomMap.put(uname, b); response.getWriter().write("3"); }
HttpClient访问的http://127.0.0.1:8082/SendSms/semdsms的servlet:service方法
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String tel = req.getParameter("tel"); String mes = req.getParameter("mes"); SMSTest sms = new SMSTest(); PrintWriter pw = resp.getWriter(); try { String msg = sms.send(mes, tel); pw.write(msg); } catch (Exception e) { e.printStackTrace(); pw.write("发送短信错误"); } }
第三方短息接口:
public class SMS{ private static final String addr = "http://api.sms.cn/mt/"; //接口服务注册的用户id private static final String userId = "*****"; /* * 如uid是：test，登录密码是：123123 pwd=md5(123123test),即 pwd=b9887c5ebb23ebb294acab183ecf0769 线生成地址：http://www.sms.cn/password */
//接口注册的密码:经过拼接字符串和md5加密后的结果
private static final String pwd = "-----------------"; private static final String encode = "utf8"; //编码 public String send(String msgContent, String mobile) throws Exception { //组建请求 String straddr = addr + "?uid="+userId+ "&pwd="+pwd+ "&mobile="+mobile+ //手机号 "&encode="+encode+ "&content=" +URLEncoder.encode(msgContent, "UTF-8"); //编码格式要对应上，不然就收不到短信 StringBuffer sb = new StringBuffer(straddr);//发送请求 URL url = new URL(sb.toString()); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("POST"); BufferedReader in = new BufferedReader(new InputStreamReader( url.openStream())); //返回结果 String inputline = in.readLine(); String msg=inputline.substring(9, 12); System.out.println("smstest="+msg); return msg; } }
自己封装的httpClient方法: 直接使用即可.
public static String post(String baseUrl, Map<String, String> paramsMap) { StringBuilder doc = new StringBuilder(); try { StringBuilder queryString = new StringBuilder(); for (Iterator<String> it = paramsMap.keySet().iterator(); it .hasNext();) { String paramName = it.next().toString(); Object paramValue = paramsMap.get(paramName); if (paramValue == null) { paramValue = ""; } queryString .append(paramName) .append("=") .append(URLEncoder.encode(paramValue.toString(), encode)) .append("&"); } if (queryString.length() > 0) { queryString.deleteCharAt(queryString.length() - 1); } URL url = new URL(baseUrl); HttpURLConnection uc = (HttpURLConnection) url.openConnection(); uc.setRequestMethod("POST"); // 设置参数--begin uc.setDoOutput(true); byte[] b = queryString.toString().getBytes(); uc.getOutputStream().write(b, 0, b.length); uc.getOutputStream().flush(); uc.getOutputStream().close(); // 参数设置--end BufferedReader in = new BufferedReader(new InputStreamReader( uc.getInputStream(), encode)); String line = null; while ((line = in.readLine()) != null) { // 处理特殊字符 line = line.replace("&", "&"); doc.append(line); } } catch (IOException e) { e.printStackTrace(); } return doc.toString(); }
