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[apex:コード]MAP の中の日付でソートをする

Last updated at Posted at 2015-04-07

Sort は List にはあるけど、MAPでするとこんな感じになる。

mapsort.java
	map<String,Date>  ADMapInfo = new  map<String,Date>();
	
	ADMapInfo.put('A10001', Date.newInstance(2014, 10, 01));
	ADMapInfo.put('A10002', Date.newInstance(2014, 01, 19));
	ADMapInfo.put('A10003', Date.newInstance(2014, 09, 23));
	ADMapInfo.put('A10004', Date.newInstance(2013, 12, 07));

	//IDを保存
	map<String,String> aMap = new Map<String,String>();
	//IDのリスト
	List<String> aList = new List<String>();
	//データのリスト
	List<Date> values = new List<Date>();

	//IDのリスト作成
	aList.addAll(ADMapInfo.keySet());

	//IDのリスト回しながら、データのリスト作成する
	//また、データ取出し用のデータを作る。
	for(String str:aList)
	{
		values.add(ADMapInfo.get(str));
		aMap.put(str+ADMapInfo.get(str).format(),str);
	}
	values.sort();
	for(Date s: values)
	{
		for(String str:aList)
		{
			if(aMap.get(str+s.format()) <> null){
				system.debug(str+ '>>' + s.format());
			}
		}
	}
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