数据库decimal类型的怎么和String类型的比大小？

Question

String sql ="SELECT e.max,e.min,e.content,e.logo, sum(c.couponfee/100) FROM couponpublish c,couponpool s,hh_coupon_equivalent e  WHERE s.pubid=c.pubid AND s.status=3";            List<Map> l = super.findListbySqlReturnMap(sql);            for(int i=0;i<l.size();i++){            double sum=(Double)list.get(i).get("sum(c.couponfee/100)");            double max =(Double)l.get(i).get("max");            double min = (Double)l.get(i).get("min");                if(sum>min&&sum<max){                    e.put("content",'2');                }            }                        max 和min是decimal类型，sum是string类型，他们3个怎么比大小

Answer 1

都转换成 BigDecimal 来比较大小啊，

String sql ="SELECT e.max,e.min,e.content,e.logo, sum(c.couponfee/100) FROM couponpublish c,couponpool s,hh_coupon_equivalent e  WHERE s.pubid=c.pubid AND s.status=3";

List<Map> l = super.findListbySqlReturnMap(sql);

for(int i = 0; i < l.size(); i++){

    BigDecimal sum= new BigDecimal(list.get(i).get("sum(c.couponfee/100)"));

    BigDecimal max = new BigDecimal(l.get(i).get("max"));

    BigDecimal min = new BigDecimal(l.get(i).get("min"));

    if(sum.compareTo(min) > 0 && sum.compareTo(max) < 0){

        e.put("content",'2');

    }

}