最新IT技術情報_arkgame.com

1.全ての要素を取り出す
<c:foreach items=”${list}” var=”kf”>
${kf}
</c:foreach>

2.begin～endの要素を取り出す
<c:foreach items =”${list}” var = “kf ” begin=”2″ end =”9″>
${kf}
</c:foreach>

3.ステータス変数
<c:foreach items=”${list}” var =”kf” varStatus=”status”>
<c:if test=”${status.count==1}>
${“test data1”}
</c:if>
${kf}
</ c:foreach>

4.ループの先頭と最後の要素
<c:foreach items=”${list}” var =”kf” varStatus=”status”>
<c:if test=”${status.first}”>先頭</c:if>
<c:if test=”${status.last}”>最後</c:if>
</c:foreach>

5.step属性
<c:foreach items=”list” var =”kf” step=”2″>
${kf}
</c:foreach>

Javaコード
public static List<Map<String, Object>> getList(String jsonString)
{
List<Map<String, Object>> list = null;
try
{
JSONArray jsonArray = new JSONArray(jsonString);
JSONObject jsonObject;
list = new ArrayList<Map<String, Object>>();
for (int i = 0; i < jsonArray.length(); i++)
{
jsonObject = jsonArray.getJSONObject(i);
list.add(getMap(jsonObject.toString()));
}
}
catch (Exception e)
{
e.printStackTrace();
}
return list;
}

Javaコード
public static Map<String, Object> getMap(String jsonString)
{
JSONObject jsonObject;
try
{
jsonObject = new JSONObject(jsonString);
@SuppressWarnings(“unchecked”)
Iterator<String> keyIter = jsonObject.keys();
String key;
Object value;
Map<String, Object> valueMap = new HashMap<String, Object>();
while (keyIter.hasNext())
{
key = (String) keyIter.next();
value = jsonObject.get(key);
valueMap.put(key, value);
}
return valueMap;
}
catch (JSONException e)
{
e.printStackTrace();
}
return null;
}