How to iterate HashMap using JSTL forEach loop

JavaServer Tag library is one of the most used JSP tag library out there. I have used it almost in all of my JEE based projects. The best feature probably is the Iterator API in JSTL tag library.

Here is a small code snippet which you might not know. Its very easy to iterate Lists using JSTL. For example:

 

 Java Code By TONY

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//Java List<String> cityList = new ArrayList<String>(); cityList.add("Washington DC"); cityList.add("Delhi"); cityList.add("Berlin"); cityList.add("Paris"); cityList.add("Rome");   request.setAttribute("cityList", cityList);     //JSP <c:forEach var="city" items="cityList">     <b> ${city} </b> </c:forEach>

But what if you want to iterate a Hashmap? Well that too is piece of cake. Here is the example:

 

 Java Code By TONY

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//Java Map<String, String> countryCapitalList = new HashMap<String, String>(); countryCapitalList.put("United States", "Washington DC"); countryCapitalList.put("India", "Delhi"); countryCapitalList.put("Germany", "Berlin"); countryCapitalList.put("France", "Paris"); countryCapitalList.put("Italy", "Rome");           request.setAttribute("capitalList", countryCapitalList);   //JSP <c:forEach var="country" items="${capitalList}">     Country: ${country.key}  - Capital: ${country.value} </c:forEach>

来自为知笔记(Wiz)