Here you can use my method for generating Random String protected String getSaltString() { String SALTCHARS ... ... <看更多>

Use the random string generator to generator easy and random strings. Generated strings are URL safe. Just user char from "A-Z", "a-z" and "0-9". Add simple ... ... <看更多>

The length of coupons are not fixed and static; Coupons can contain A-Z, a-z and 0-9 (case sensitive alphanumeric); Coupons should be unique (which means that ... ... <看更多>

It's easier than you think. Just used normal Random function nextInt() in charAt() function of String. ... <看更多>