MessagePack序列化对象的实例

1、maven

<!-- https://mvnrepository.com/artifact/org.msgpack/msgpack -->
        <dependency>
            <groupId>org.msgpack</groupId>
            <artifactId>msgpack</artifactId>
            <version>0.6.7</version>
        </dependency>

2、被序列化的类（com.utils.User.java）

/**
 * <p>Title: </p>
 * <p>Description: </p>
 *
 * @Author 
 * @CreateTime 
 */
//@Message
public class User {
 
    private Long id;
    private String provinceName;
    private Integer age;
    private Date createdTime;
 
    //这个默认构造函数必须要有，不然用Msgpack序列化时会报错
    public User() {
    }
 
    public User(Long id, String provinceName, Integer age, Date createdTime) {
        this.id = id;
        this.provinceName = provinceName;
        this.age = age;
        this.createdTime = createdTime;
    }
 
    public User buildUserId(Long id) {
        this.id = id;
        return this;
    }
 
    public User buildAge(Integer age) {
        this.age = age;
        return this;
    }
 
    public Long getId() {
        return id;
    }
 
    public void setId(Long id) {
        this.id = id;
    }
 
    public String getProvinceName() {
        return provinceName;
    }
 
    public void setProvinceName(String provinceName) {
        this.provinceName = provinceName;
    }
 
    public Integer getAge() {
        return age;
    }
 
    public void setAge(Integer age) {
        this.age = age;
    }
 
    public Date getCreatedTime() {
        return createdTime;
    }
 
    public void setCreatedTime(Date createdTime) {
        this.createdTime = createdTime;
    }
 
}

3.测试实例

public static void main(String[] args) throws Exception {
        MessagePack msgpack = new MessagePack();
        try {
            User user = new User(1001L, "山西", 23, new Date());
//            User user = new User();
//            user.buildAge(12);
            msgpack.register(User.class);//与 @Message注解用其一即可
            byte[] serial = msgpack.write(user);
//            User user2 = msgpack.read(serial, User.class);//可以
            User user2 = msgpack.read(serial, user);//可以
            System.out.println(user2.getAge());//12
        } catch (IOException e) {
            e.printStackTrace();
        }
//        Exception in thread "main" org.msgpack.MessageTypeException:
//        Cannot find template for class com.weather.weatherexpert.common.utils.MsgpackUtil$User class.
//        Try to add @Message annotation to the class or call MessagePack.register(Type).
    }

报错：

1.User类的默认构造函数必须要有，不然用Msgpack序列化时会报错：no such constructor: com.utils.User 

 2.User类上需添加@Message或使用msgpack.register(User.class)，否则会报错：Cannot find template for class com.utils.User class.  Try to add @Message annotation to the class or call MessagePack.register(Type).

 参考：https://blog.csdn.net/u010002184/article/details/86546133