MultiValueMap的用法（一个key对应多个value）

Posted 2022-11-30 Warren技术宅

要实现1个key对应多个value,可以用apach提供的MultiValueMap

import org.apache.commons.collections.map.MultiValueMap;
import java.util.Collection;

public class TestMain

    public static void main(String[] args) throws IOException
    
                MultiValueMap mailMap = new MultiValueMap();
                 mailMap.put("number", "1");
                 mailMap.put("number", "30");
                 mailMap.put("name", "wang");
                 mailMap.put("card", "12344");
                 mailMap.put("card", "65432");

                Collection mapcoll = null;
                mapcoll = mailMap.getCollection("card");
                Iterator ii = mapcoll.iterator();
                while(ii.hasNext())
                   String mailValue = (String) ii.next();
                   System.out.println(mailValue);
                
   
   

输入结果：

12344

65432