BigDecimal比较两数大小
BigDecimal num1 = new BigDecimal("10");
BigDecimal num2 = new BigDecimal("5");
int result = num1.compareTo(num2);
if(result < 0) {
System.out.println("num1小于num2");
} else if(result == 0) {
System.out.println("num1等于num2");
} else {
System.out.println("num1大于num2");
}