无法为标记构建java对象：yaml.org，2002：

Question

当我尝试在数据文件中创建对象时，在获取以下异常时会出现assest类。我试过dum它能够转储数据，但当我试图读取相同的数据时我得到了异常

 [ConstructorException: null; Can't construct a java object for tag:yaml.org,2002:model.Asset; exception=Class not found: model.Asset]

文件阅读器

package utill;

import org.yaml.snakeyaml.Yaml;
import java.io.File;
import java.io.FileInputStream;
import java.io.*;
import java.io.InputStream;
import java.util.*;
import model.*;
import java.util.LinkedHashMap;
import org.yaml.snakeyaml.constructor.Constructor;


public class FileReaderUtill  {

public static List getAssest(String fileName){
LinkedHashMap<String,Asset> assest=null;
List<Asset> data= new ArrayList<Asset>();
 try{
 InputStream input = new FileInputStream(new File("conf/datafile.yaml"));
 Yaml yaml = new Yaml();

 data=(List<Asset>)yaml.load(input);

  //System.out.println(assest.get("Asset0"));
    }catch(IOException e){
    e.printStackTrace();
}
  return data;
    }
}

Datafile.yaml

- !!model.Asset {cid: null, enable: '1', id: re, internalName: df, name: fd}
- !!model.Asset {cid: null, enable: '0', id: rexz, internalName: dxxf, name: fdxxx}

Assest.java

package model;


public class Asset  {
public Asset(){
}
public Asset(String id,String cid,String name,String internalName,String enable ){
this.id=id;
this.name=name;
this.internalName=internalName;
this.enable=enable;
}

public String id;
public String cid;
public String name;
public String internalName;
public String enable;   

}

请帮我解决这个问题。