/**
* 生成制定長度驗證碼
* @param verifyCode_len 驗證碼長度
* @return
* String
*/
private String getRandmonVerifyCode(int verifyCode_len){
char[] c = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
int maxNum = 10;
int count = 0;//記錄驗證碼長度
StringBuffer verifyCodeStr = new StringBuffer();
Random random = new Random();
while(count < verifyCode_len){
int i = random.nextInt(maxNum);
if(i >= 0 && i < c.length){
verifyCodeStr.append(String.valueOf(i));
count++;
}
}
return verifyCodeStr.toString();
}