获取验证码方法

/**
 * @MethodName getVerificationCode
 * @Description TODO 获取验证码
 * @Author zak
 */

//想要获取验证码可以直接调用这个方法

public static String genCodes(int length, long num) {
        String results="";
        for(int j=0;j<num;j++){
            String val = "";

            Random random = new Random();
            for(int i = 0; i < length; i++)
            {
                String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; // 输出字母还是数字

                if("char".equalsIgnoreCase(charOrNum)) // 字符串
                {
                    int choice = random.nextInt(2) % 2 == 0 ? 65 : 97; //取得大写字母还是小写字母
                    val += (char) (choice + random.nextInt(26));
                }
                else if("num".equalsIgnoreCase(charOrNum)) // 数字
                {
                val += String.valueOf(random.nextInt(10));
                }
            }
            val= val.toLowerCase();
            if(results.contains(val)){
                continue;
            }else{
                return val;
            }
        }
        return results;
    }

只输出数字的验证码

public static String genCodes(int length, long num) {
        String results="";
        for(int j=0;j<num;j++){
            String val = "";

            Random random = new Random();
            for(int i = 0; i < length; i++)
            {
//                String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; // 输出字母还是数字
//
//                if("char".equalsIgnoreCase(charOrNum)) // 字符串
//                {
//                    int choice = random.nextInt(2) % 2 == 0 ? 65 : 97; //取得大写字母还是小写字母
//                    val += (char) (choice + random.nextInt(26));
//                }
//                else if("num".equalsIgnoreCase(charOrNum)) // 数字
//                {
                val += String.valueOf(random.nextInt(10));
//                }
            }
            val= val.toLowerCase();
            if(results.contains(val)){
                continue;
            }else{
                return val;
            }
        }
        return results;
    }

调用的例子，把验证码存入redis中

 　　/**
     * @MethodName getVerificationCode
     * @Description TODO 获取验证码
     * @Author zak
     */
    @ApiOperation(value = "获取验证码")
    @ApiImplicitParam(name = "${pk.attrname}", value = "获得${className}模块详细数据", required = true,dataType = "${pk.attrType}")
    @NoToken
    @ResponseBody
    @RequestMapping(value = "/getVerificationCode.api")
    public String getVerificationCode() {
        //获取验证码
        String code = VerificationCodeUtils.genCodes(4, 1);
        //获取ip
        String ip = IpUtils.getIpAdrress(request);
        //设置验证码五分钟有效期
        RBucket<String> keyObj = redissonService.getRBucket(ip);
        keyObj.set(code, 5, TimeUnit.MINUTES);
        return code;
    }