freemarker中的round、floor和ceiling数字的舍入处理
1、简易说明
（1）round:四舍五入
（2）floor:向下取整
（3）ceiling:向上取整
2、举例说明
<#--freemarker中的round、floor和ceiling数字的舍入处理-->
<#--round:四舍五入-->
<#--floor:向下取整-->
<#--ceiling:向上取整-->
<#assign numList = [12,0.23,89,12.03,69.56,45.67,-0.56,-8.05,-89.56,4.69]/>
<#list numList as num>
${num} ?round=${num?round} ?floor=${num?floor} ?ceiling=${num?ceiling}
</#list>
3、示例结果
<span style="white-space:pre"> </span> 12 ?round=12 ?floor=12 ?ceiling=12
0.23 ?round=0 ?floor=0 ?ceiling=1
89 ?round=89 ?floor=89 ?ceiling=89
12.03 ?round=12 ?floor=12 ?ceiling=13
69.56 ?round=70 ?floor=69 ?ceiling=70
45.67 ?round=46 ?floor=45 ?ceiling=46
-0.56 ?round=-1 ?floor=-1 ?ceiling=0
-8.05 ?round=-8 ?floor=-9 ?ceiling=-8
-89.56 ?round=-90 ?floor=-90 ?ceiling=-89
4.69 ?round=5 ?floor=4 ?ceiling=5
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