数字与字母 随机数小demo
public String generateRandomId(){ String chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ"; StringBuffer buffer = new StringBuffer(); for (int i = 0; i < 16; i++) { buffer.append(chars.charAt(new Random().nextInt(chars.length()))); } buffer.insert(0, "TR"); return buffer.toString(); }
posted on 2016-04-01 11:21 Crazy_snail 阅读(170) 评论(0) 编辑 收藏 举报