Seputar Ilmu

Though there are a number of ways to loop over an HashMap in JSP, or any other Map implementation e.g. Hashtable, I personally prefer the JSTL foreach tag for iteration over HashMap in JSP. As a Java programmer, you will often have a strong urge to use Java code directly in JSP using scriptlet, but that's a bad coding practice and one should always avoid that. In fact, by smart use of expression language and JSTL core tag library, you can reduce a lot of Java code from your JSP page. In our last post, we have seen an example of JSTL foreach tag to loop over List , but not an HashMap, and that creates a doubt in one of my readers mind that foreach tag doesn't support Map implementation like HashMap or Hashtable as they are not Collection, but that's not true. You can use the same technique to loop over an HashMap in JSP which we have used earlier to loop over a list in JSP. Read more �

JSTL foreach loop in JSP JSTL foreach tag is pretty useful while writing Java free JSP code. JSTL foreach tag allows you to iterate or loop Array List , HashSet or any other collection without using Java code. After introduction of JSTL and expression language(EL) it is possible to write dynamic JSP code without using scriptlet which clutters jsp pages. JSTL foreach tag is a replacement of for loop and behaves similarly like foreach loop of Java 5 but still has some elements and attribute which makes it hard for first-timers to grasp it. JSTL foreach loop can iterate over arrays, collections like List , Set and print values just like for loop. In this JSP tutorial we will see couple of example of foreach loop which makes it easy for new guys to understand and use foreach loop in JSP. By the way this is our second JSP tutorial on JSTL core library, in last tutorial we have seen How to use core <c:set> tag in JSP page . Read more �