无法在Java中反序列化MultiValuedHashMap

Question

我试图反序列化javax.ws.rs.core.MultiValuedHashMap。

MultivaluedHashMap实现java.io.Serializable，并且有一个公共的、没有arg构造函数。

package test;

import org.apache.commons.lang3.SerializationUtils;
import javax.ws.rs.core.MultivaluedHashMap;

public class Test {
    public static void main(String[] args) throws Exception {

        MultivaluedHashMap<String, String> map = new MultivaluedHashMap<String, String>();
        byte[] serializedMap = SerializationUtils.serialize(map);

        MultivaluedHashMap<String, String> deserializedMap = SerializationUtils.deserialize(serializedMap);
    }
}

提前感谢你的帮助。

Answer 1

发生这种情况是因为MultivaluedHashMap没有实现Serializable。要解决此问题，请执行以下操作：

import java.io.Serializable;

import javax.ws.rs.core.MultivaluedHashMap;

public class MyMultivaluedHashMap<K, V> extends MultivaluedHashMap<K, V> implements Serializable{
	private static final long	serialVersionUID	= 1L;
	public MyMultivaluedHashMap(){
		super();
		//there are other contruc super class
	}
}

//your code
import javax.ws.rs.core.MultivaluedHashMap;

import org.apache.commons.lang3.SerializationUtils;

public class Teste{
    public Teste(){}
    public static void main(String[] args) throws Exception{
        MyMultivaluedHashMap<String, String> map = new MyMultivaluedHashMap<String, String>();
        map.addFirst("key-1", "chubby");
        map.add("key-2", "skinny");
        byte[] serializedMap = SerializationUtils.serialize(map);
        System.out.println(serializedMap);
        MultivaluedHashMap<String, String> deserializedMap = SerializationUtils.deserialize(serializedMap);
        System.out.println(deserializedMap);
    }
}