/**
* 生成固定位数的随机数
*
* @param length 随机数长度
* @return string
*/
private static String getRandom(int length) {
char[] chars = new char[length];
for (int i = 0; i < length; i++) {
chars[i] = '0';
}
String patten = new String(chars);
int randomBase = Integer.valueOf("1" + patten);
int rand = (int) (Math.random() * randomBase);
DecimalFormat decimalFormat = new DecimalFormat(patten);
return decimalFormat.format(rand);
}
@Test
/** * 生成0-1之间的随机数 * */
public void tset(){
double random = Math.random();
System.out.println(random);
}
