使用Java很方便的一條就是Java封裝了很多方便使用的Map和List。

這是我在開發過程中遇到的問題，通過傳入的字串封裝成List<Map<String, String>>格式，然後進行想要的操作，奉上程式碼！

/* 輸入引數：
	 * [{"index":"SB001","value":"0.380658"},{"indexNo":"SB002","value":"19.801300"},
	 * {"index":"SB003","value":"1.479825"},{"indexNo":"SB004","value":"15.371400"},
	 * {"index":"SB005","value":"1.079054"}]
	 * 返回值：
	 * [{"index":"SB001","value":"0.380658","chineseParam":"指標一"},{"indexNo":"SB002","value":"19.801300","chineseParam":"指標二"},
	 * {"index":"SB003","value":"1.479825","chineseParam":"指標三"},{"indexNo":"SB004","value":"15.371400","chineseParam":"指標四"},
	 * {"index":"SB005","value":"1.079054","chineseParam":"指標五"}]
	*/
	public static List<Map<String, String>> addKeyAndValueInMap(List<Map<String, String>> list) {
		
		Map<String, String> keyValue =new HashMap<String,String>();
		keyValue.put("SB001", "指標一");
		keyValue.put("SB002", "指標二");
		keyValue.put("SB003", "指標三");
		keyValue.put("SB004", "指標四");
		keyValue.put("SB005", "指標五");
		keyValue.put("SB006", "指標六");
		keyValue.put("SB007", "指標七");
		
		for(Map<String, String> map : list){
			String key = map.get("index");
			if(keyValue.containsKey(key)){
				map.put("chineseParam", keyValue.get(key));
			}
		}

		return list;
	}
	/* 輸入引數：list1
	 * [{"index":"SB001","value":"0.3"},{"indexNo":"SB002","value":"19.0"},
	 * {"index":"SB003","value":"1.4"},{"indexNo":"SB004","value":"15"},
	 * {"index":"SB005","value":"1.0"}]
	 * 輸入引數：list2
	 * [{"index":"SB001","value":"0.4"},{"indexNo":"SB002","value":"19.1"},
	 * {"index":"SB003","value":"1.5"},{"indexNo":"SB004","value":"12"},
	 * {"index":"SB005","value":"1.0"}]
	 * 返回值：
	 * ["SB001":"1","SB002":"1",
	 * "SB003":"1","SB004":"-1",
	 * "SB005":"1"]
	*/
	public static Map<String, String> compareList(List<Map<String, String>> list1,List<Map<String, String>> list2){
		
		Map<String , String> map1 = new HashMap<String , String>() ;
		Map<String , String> map2 = new HashMap<String , String>() ;
		for(Map<String , String> a : list1){
			map1.put( a.get("index") , a.get("value")) ;
		}
		for(Map<String , String> b : list2){
			map2.put( b.get("index") , b.get("value")) ;
		}
		
		Map<String , String> map3 = new HashMap<String , String>() ;
		for(Map.Entry<String, String> a : map1.entrySet()){
			String key = a.getKey() ;
			String value = a.getValue() ;
			if(map2.containsKey(key)){
				map3.put(key , value.compareTo(map2.get(key)) < 0 ? "-1" : "1") ;
			}
		}
		return map3;
	}