html开发教程——freemark笔记。

[#if current_cmsone.userName??]

value="${current_cmsone.userName!}"

[/#if]

如果current_cmsone此对象为空，则运行不到“.userName”，所以仍然会报异常

正确的写法：将current_cmsone.userName用括号括起来

[#if (current_cmsone.userName)??]

value="${current_cmsone.userName!}"

[/#if]