JAVA生成随机文件名

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//生成随机文件名，防止上传文件后文件名重复
public String generateRandomFilename(){
String RandomFilename = "";
Random rand = new Random();//生成随机数
int random = rand.nextInt();

Calendar calCurrent = Calendar.getInstance();
int intDay = calCurrent.get(Calendar.DATE);
int intMonth = calCurrent.get(Calendar.MONTH) + 1;
int intYear = calCurrent.get(Calendar.YEAR);
String now = String.valueOf(intYear) + "_" + String.valueOf(intMonth) + "_" +
String.valueOf(intDay) + "_";

RandomFilename = now + String.valueOf(random > 0 ? random : ( -1) * random);

return RandomFilename;
}

JAVA生成随机文件名

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原文地址：http://www.cnblogs.com/hahaxiaoyu/p/5109092.html