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());
zbb20181227 map,LinkedHashMap按顺序存放key,MultiValueMap 一个key对多个value
原文：https://www.cnblogs.com/super-admin/p/10184388.html