isNull判断property字段是否是null,用isEmpty更方便,包含了null和空字符串
例子一:
isEqual相当于equals,数字用得多些,一般都是判断状态值
<isEqual property="state" compareValue="0">
< /isEqual>
或
<isEqual property="state" compareProperty="nextState">
< /isEqual>
例子一:
传入的map或者类的属性name等于"1"吗,是就附加and和vvvv = ‘哈哈‘
<isEqual property="name" compareValue="1" prepend="and">
vvvv = ‘哈哈‘
< /isEqual>
传入的map或者类的属性name是null吗,是就附加and和vvvv = null
< isNull property="name" prepend="and">
vvvv = null
< /isNull>
时间: 2024-10-13 03:09:19