The tags dsp:setvalue and dsp:a can use EL to set properties. For example:

<dsp:importbean bean="/samples/Student_01" var="student"/>
<dsp:importbean bean="/samples/Teacher1"/>

<dsp:setvalue bean="Teacher1.oldestStudent" value="${student.name"}/>

Note: EL can only be used to express the source value; the target expression must directly specify the component property to set.