java 随机生成6位短信验证码实例代码

生成6位随机数字其实很简单，只需一行代码，具体如下：

String verifyCode = String.valueOf(new Random().nextInt(899999) + 100000);

具体实现发送短信验证码功能，以注册为例，其实现代码如下：

这里需要用到第三方短信验证码接口，这里用到的是乐信短信验证码接口，乐信接口API文档说明（http://www.lx598.com/apitext.html），乐信java调用短信验证码接口 demo（http://www.lx598.com/javaCode.html）。

// 注册新用户

  @Action(value = "reAimcodeGetVeCode")
  public void reAimcodeGetVeCode() {
    PrintWriter out;
    String result = "验证码申请失败！请重试！";
    try {
      smsUnit = new SmsUnit(ConfUtil.getProperty("sys_sms_server"));
      if (null != account.getACCMOB() && !account.getACCMOB().equals("")) {
 account.setACCSTATUS(new BigDecimal(1));//设置使用状态未用
 String verifyCode = String
     .valueOf(new Random().nextInt(899999) + 100000);//生成短信验证码
 account.setFSECURITYCODE(verifyCode);
 account.setACCCREATEDATE(new Date());
 
 // 设置验证码失效时间为1分钟
 Calendar c = Calendar.getInstance();
 c.add(Calendar.  Minute in hour, 1); 
 // 执行短信发送
 account.setFREGISTERSOURCE(fromSource);
   request.getSession().removeAttribute(ConstValues.WEB_SESSION_PROMOTE);
   AccountCriteria ac = new AccountCriteria();
   ac.createCriteria().andACCMOBEqualTo(account.getACCMOB());
   List acList = new ArrayList();
   acList = accountService.selectByExample(ac);
   if (acList != null && acList.size() > 0) {
     String content = "您的验证码为:" + verifyCode+"，该码有效期为24小时，该码只能使用一次！【短信签名】";
     SendSmsReply sendSmsReply = smsUnit.sendSms(accName,accPwd ,account.getACCMOB(),content,"");
 
//调用第三方接口发送短信     result = sendSmsReply.getReplyMsg() + "&"
  + acList.get(0).getFID() + "&"
  + acList.get(0).getSDKURL();
   }
      }
    } catch (Exception e) {
      logger.error("获取验证码失败", e);
    } finally {
      try {
 response.setContentType("text/html;charset=UTF-8");
 response.setCharacterEncoding("UTF-8");
 out = response.getWriter();
 out.write(result);
      } catch (IOException e) {
 logger.error("", e);
      }
    }
  }

//第三方短信发送接口代码：

 public static String sendSms(String accName,String accPwd,String mobies,String content,String schTime){
   StringBuffer sb = new StringBuffer("http://sdk.lx198.com/sdk/send2?");
   try {
     String seed=new SimpleDateFormat(dateFormatStr).format(new Date());
     sb.append("&accName="+accName); 
     sb.append("&seed="+seed);
     sb.append("&accPwd="+MD5.getMd5String(MD5.getMd5String(accPwd)+seed)); 
     sb.append("&aimcodes="+mobies);
     sb.append("&schTime="+URLEncoder.encode(schTime,"UTF-8")); //空格标点符号做encode转换
     sb.append("&content="+URLEncoder.encode(content,"UTF-8")); //中文做encode转换
     URL url = new URL(sb.toString());
     HttpURLConnection connection = (HttpURLConnection) url.openConnection();
     connection.setRequestMethod("POST");
     BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
     return in.readLine();
   } catch (Exception e) {
     e.printStackTrace();
   }
   return null;
 }

PS:Java随机生成四位数字的验证码

package com.day14string;
import java.util.Random;
public class Test2 {
 public String getCheckCode() {
 String ZiMu = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGJKLZXCVBNM1234567890";
 String result = "";
 Random random = new Random();
 for (int i = 0; i < 4; i++) {
  int index = random.nextInt(ZiMu.length());
  char c = ZiMu.charAt(index);
  result += c;
 }
 return result;
 }
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 Test2 test2 = new Test2();
 System.out.println(test2.getCheckCode());
 }
}

 总结

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