java - jsp同时满足两个条件<c:when test="${!empty webUser&&page_name != 'main'}"

Question

这样写语法对吗？测试没通过，那该怎么写呢？

Answer 1

There is nothing wrong with the expression, but there may be something wrong with the value.

Answer 2

<c:when test="${!empty webUser}"><c:if test="${page_name ne 'main'}">.....</c:if></c:when>
可以将它分开写

Answer 3

It seems that c:when these are used together in a set
For example:
`<c:choose>

       <c:when test=条件>内容</c:when>
      <c:when test=条件>内容</c:when>
     <c:otherwise>内容</c:otherwise>

</c:choose>`
is if...else if...else if...else

If it is just a judgment, just use <c:if test=condition>content</c:if>

Use as needed

Answer 4

Try splitting it into two ifs