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  • zbb20181227 map,LinkedHashMap按顺序存放key,MultiValueMap 一个key对多个value

    MultiValueMap 一个key对多个value 需要引入pom

    <dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-collections4</artifactId>
    <version>4.2</version>
    </dependency>

    MultiValueMap multiValueMap = new MultiValueMap();
    multiValueMap.put("123", "String");
    multiValueMap.put("123", "String");
    multiValueMap.put("abc", "String");
    multiValueMap.put("abcde", "String");
    multiValueMap.put("1234", "String");
    multiValueMap.put("abcd", "String");
    multiValueMap.put("1234", "String");
    System.out.println(multiValueMap.getCollection("123"));
    System.out.println(multiValueMap.keySet());

    LinkedHashMap按顺序存放key,

    Map<String, String> multiValueMap = new LinkedHashMap<String, String>();
    multiValueMap.put("123", "String");
    multiValueMap.put("123", "String");
    multiValueMap.put("abc", "String");
    multiValueMap.put("abcde", "String");
    multiValueMap.put("1234", "String");
    multiValueMap.put("abcd", "String");
    multiValueMap.put("1234", "String");
    System.out.println(multiValueMap.keySet());

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  • 原文地址:https://www.cnblogs.com/super-admin/p/10184388.html
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