Java实现byte[]转List的示例代码

        <dependency>
            <groupid>com.google.guava</groupid>
            <artifactid>guava</artifactid>
            <version>30.1.1-jre</version>
        </dependency>

package ai.guiji.csdn.tools;

import com.google.common.primitives.bytes;

import java.util.arrays;
import java.util.list;

/** @author 剑客阿良_aliang @date 2022/1/26 14:51 @description: byte工具 */
public class byteutils {
  /**
   * 字节组转list
   *
   * @param bytes 字节组
   * @return list
   */
  public static list<byte> bytestolist(byte[] bytes) {
    return bytes.aslist(bytes);
  }

  /**
   * list转字节组
   *
   * @param list list
   * @return byte[]
   */
  public static byte[] listtobytes(list<byte> list) {
    return bytes.toarray(list);
  }

  /**
   * 截取bytes
   *
   * @param bytes 字节组
   * @param from 起始位
   * @param to 结束位
   * @return bytes
   */
  public static byte[] subbytes(byte[] bytes, int from, int to) {
    return arrays.copyofrange(bytes, from, to);
  }
}

//将map转换成byte[]
    protected byte[] changemaptobyte(map<string,string> map) {
        
        byte[] bytes = null;
        try {
            bytes = jsonserilizable.serilizableformap(map).getbytes();
        } catch (exception e) {
            baselog.error("map到byte[]转换异常",e);
        }
        
        return bytes;
    }
    
    //将byte[]转换成map
    protected map<string, string> changebytetomap(byte[] bytes) {
        
        map<string, string> retmap = null;
 
        try {
            if(bytes != null) {
                retmap = jsonserilizable.deserilizableformapfromfile(new string(bytes), string.class);
            }else {
                baselog.error("changebytetomap中bytes为null");
            }
            
        } catch (exception e) {
            baselog.error("byte到map转换异常",e);
        }
        
        return retmap;
    }

package com.jd.goldeneye.stat.common;
 
import java.io.ioexception;
import java.util.hashmap;
import java.util.list;
import java.util.map;
 
import com.jd.fastjson.json;
import com.jd.fastjson.typereference;
 
public class jsonserilizable {
 
    /* 将链表序列化为字符串存入json文件中 */
    public static string serilizableforlist(object objlist)
            throws ioexception {
 
        string liststring = json.tojsonstring(objlist, true);// (maps,cityentity.class);
        
        return liststring;
    }
 
    /* 将json文件中的内容读取出来，反序列化为链表 */
    public static <t> list<t> deserilizableforlistfromfile(string liststring2,class<t> clazz)
            throws ioexception {
 
        list<t> list2 = json.parsearray(liststring2, clazz);
        return list2;
    }
 
    /* 将hashmap序列化为字符串存入json文件中 */
    public static string serilizableformap(object objmap)
            throws ioexception {
 
        string liststring = json.tojsonstring(objmap, true);// (maps,cityentity.class);
        return liststring;
    }
 
    /* 将json文件中的内容读取出来，反序列化为hashmap */
    public static <t, k> hashmap<k, t> deserilizableformapfromfile(string liststring2,class<t> clazz) throws ioexception {
        
        map<k, t> map = json.parseobject(liststring2, new typereference<map<k, t>>() {});
        
        return (hashmap<k, t>) map;
    }
    
    
    
    
    //使用方法 注意entity为随机定义，使用时用自己的类名替换下就可以用了
    /*string pathname = "src/test/java/com/...../resources/file.json";
    list<entity> entitylist = new arraylist<entity>();
    jsonserilizable.serilizableforlist(entitylist, pathname);
    list<entity> entitylist2 = jsonserilizable
            .deserilizableforlistfromfile(pathname, entity.class);
    
    
    hashmap<integer, entity> map = new hashmap<integer, entity>();
    jsonserilizable.serilizableformap(map, pathname);
    hashmap<integer, entity> map2 = jsonserilizable
            .deserilizableformapfromfile(pathname, entity.class);*/
 
}

//将map转换成byte[]
    protected byte[] changemaptobyte(map<string,string> map) {
        
        byte[] bytes = null;
        try {
            bytes = jsonserilizable.serilizableformap(map).getbytes();
        } catch (exception e) {
            baselog.error("map到byte[]转换异常",e);
        }
        
        return bytes;
    }
    
    //将byte[]转换成map
    protected map<string, string> changebytetomap(byte[] bytes) {
        
        map<string, string> retmap = null;
 
        try {
            if(bytes != null) {
                retmap = jsonserilizable.deserilizableformapfromfile(new string(bytes), string.class);
            }else {
                baselog.error("changebytetomap中bytes为null");
            }
            
        } catch (exception e) {
            baselog.error("byte到map转换异常",e);
        }
        
        return retmap;
    }