redis存取对象

redis主要存储类型最常用的五种数据类型：

• String
• Hash
• List
• Set
• Sorted set

redis不能直接存取对象，如何解决呢？

两种方式

1、利用序列化和反序列化的方式

两层对象存取到redis 示例：

序列化工具类

public class SerializeUtil {
    public static byte[] serialize(Object object) {
        ObjectOutputStream oos = null;
        ByteArrayOutputStream baos = null;
        try {
//序列化
            baos = new ByteArrayOutputStream();
            oos = new ObjectOutputStream(baos);
            oos.writeObject(object);
            byte[] bytes = baos.toByteArray();
            return bytes;
        } catch (Exception e) {
        }
        return null;
    }

    public static Object unserialize(byte[] bytes) {
        ByteArrayInputStream bais = null;
        try {
//反序列化
            bais = new ByteArrayInputStream(bytes);
            ObjectInputStream ois = new ObjectInputStream(bais);
            return ois.readObject();
        } catch (Exception e) {
        }
        return null;
    }
}

public class Person implements Serializable {
    private String pid;
    private String pName;
    private String nation;
    private String age;
    private Animal animal;

　　

public class Animal implements Serializable {
    private String aId;
    private String color;
    private String hobby;
    private String aName;

在此强调必须让类实现序列化

public class RedisObject {
    public static void main(String[] args) {
        //连接本地的 Redis 服务
        Jedis jedis = new Jedis("10.0.34.52",6379);
        jedis.auth("");
        System.out.println("Connection to server sucessfully");
        //查看服务是否运行
        System.out.println("Server is running: " + jedis.ping());
        Person person = new Person();
        person.setAge("15");
        person.setNation("美国");
        person.setpName("jim");
        Animal animal = new Animal();
        animal.setaId("21");
        animal.setaName("小白");
        animal.setColor("red");
        person.setAnimal(animal);
        System.out.println("序列化中");
        jedis.set("person".getBytes(),SerializeUtil.serialize(person));
        System.out.println("序列化成功");
        byte[] bytes = jedis.get("person".getBytes());
        Object object = SerializeUtil.unserialize(bytes);
        Person person1= (Person)object;
        System.out.println(person1);

2:将java对象转换为json字符串,利用json与java对象之间可以相互转换的方式进行存值和取值

try {
    String s = JacksonUtils.getInstance().writeValueAsString(person);
    System.out.println("对象转化字符串："+s);
    jedis.set("person2",s);
    String person2 = jedis.get("person2");
    Person person3 = JacksonUtils.getInstance().readValue(person2, Person.class);
    System.out.println(person3);
} catch (IOException e) {
    e.printStackTrace();
}