将Map<String，String[]>转换为MultiValueMap<String，String>

import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

import java.util.Map;

public class MapConverter {
    public static MultiValueMap<String, String> convert(Map<String, String[]> map) {
        MultiValueMap<String, String> multiValueMap = new LinkedMultiValueMap<>();
        for (Map.Entry<String, String[]> entry : map.entrySet()) {
            String key = entry.getKey();
            String[] values = entry.getValue();
            for (String value : values) {
                multiValueMap.add(key, value);
            }
        }
        return multiValueMap;
    }

    public static void main(String[] args) {
        Map<String, String[]> map = new HashMap<>();
        map.put("key1", new String[]{"value1", "value2"});
        map.put("key2", new String[]{"value3"});
        map.put("key3", new String[]{"value4", "value5", "value6"});

        MultiValueMap<String, String> multiValueMap = convert(map);
        System.out.println(multiValueMap);
    }
}