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)