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How to get the map value is not so low. There are three ways to get the map parameters

2022-04-21 17:46:00 【The sky in July and August】

obtain map Three ways of parameter

1. Third party tools

common-collections-3.2.2

String name = MapUtils.getString(params, "name");


public static String getString(final Map map, final Object key) {
    if (map != null) {
        Object answer = map.get(key);
        if (answer != null) {
            return answer.toString();
        }
    }
    return null;
}

2. Don't want to quote third parties Jar, Just imitate and write a MapUtil Tool class

3. Manual access （ It's so low 了 , Ah ）

 String name = null;
if (params.containsKey("name")) {
    name = params.get("name").toString();
}

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https://yzsam.com/2022/04/202204211740318435.html

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