如果想要生成一次性访问code，可以参考如下：
返回String方式：
代码语言：txt复制 * @param length The number of digits to return
* @return a random number the length of the input param length
* @description one limitation, will never start with 0
*/
public static String generateRandomNumber(Integer length) {
String result = '';
while(result.length() < length){
//Math.abs used to cast Crypto.getRandomLong() to a positive number
result = String.valueOf(Math.abs(Crypto.getRandomLong()));
}
return result.substring(0,length);
}返回Integer方式
代码语言：txt复制 * @param length The number of digits to return
* @return a random number the length of the input param length
* @description one limitation, will never start with 0
*/
public static String generateRandomNumber(Integer length) {
String result = '';
while(result.length() < length){
//Math.abs used to cast Crypto.getRandomLong() to a positive number
result = String.valueOf(Math.abs(Crypto.getRandomLong()));
}
return Integer.valueOf(result.substring(0,length));
}使用 Math.Random() 生成随机数
代码语言：txt复制//Generate a random Double between 0 and 1
System.debug(Math.Random());
//Prints e.g. 0.3128804447173097
//Generate a random Double between 0 and 10
System.debug(Math.Random() * 10);
//Prints e.g. 5.235707559078412
//Generate a random Integer between 0 and 10
System.debug(Integer.valueOf(Math.Random() * 10));
//Prints e.g. 5
//Generate a random Integer between 0 and 100
System.debug(Integer.valueOf(Math.Random() * 100));使用加密类生成随机整数
代码语言：txt复制System.debug(Crypto.getRandomInteger());
//prints e.g. -1608518142此文章link：
https://www.levelupsalesforce.com/apex-generate-random-number
