AscII: 数字0~9 :48-57
大写字母:65-90
小写字母:97-122
Random random = new Random();
while(true){
int x = 48 + random.nextInt(62);
System.out.println((char)(x+(x/58)*7+(x/84)*6));
AscII: 数字0~9 :48-57
大写字母:65-90
小写字母:97-122
Random random = new Random();
while(true){
int x = 48 + random.nextInt(62);
System.out.println((char)(x+(x/58)*7+(x/84)*6));