To configure JSTL Core library with Liferay require following steps
Step 1 : Add jstl-api.jar and jstl-impl.jar into your liferay-plugin-package.properties file
/WEB-INF/liferay-plugin-package.properties
or
copy both these jars into your project - /WEB-INF/lib folder
Step 2 : Include following syntax to JSTL Core library in your JSP:
<%@ taglib uri="http://java.sun.com/jstl/core_rt" prefix="c"%>
e.g Set attribute in your java class
Employee e1 =new Employee(1, "Tanaji", "Mumbai");
List<Employee> empList = new ArrayList<Employee>();
empList.add(e1);
request.setAttribute("employeeList", empList);
Now you can use JSTL tag directly in your JSP file like this....
<c:forEach var="emp" items="${employeeList}" >
Employee Name :-> <c:out value="${emp.name}"></c:out>
</c:forEach>
