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');
    }
}