被static和transient关键字修饰过的字段是不会被序列化和反序列化的

方式1:自定义序列化字段

Java:

实现Externalizable接口

public class User implements Externalizable {

    private Long id;
    private transient String statusName;
    private Date createTime;

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
        System.out.println("Externalizable.writeExternal(ObjectOutput out) is called");
        out.writeLong(this.id);
        out.writeUTF(this.statusName);
        out.writeObject(this.createTime);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        System.out.println("Externalizable.readExternal(ObjectInput in) is called");
        this.id = in.readLong();
        this.statusName = in.readUTF();
        this.createTime = (Date) in.readObject();
    }

}

kryo:

实现KryoSerializable接口

public class User implements KryoSerializable {

    private Long id;
    private transient String statusName;
    private Date createTime;

    @Override
    public void write(Kryo kryo, Output out) {
        out.writeLong(this.id);
        out.writeString(this.statusName);
        out.writeLong(this.createTime.getTime());
    }

    @Override
    public void read(Kryo kryo, Input in) {
        this.id = in.readLong();
        this.statusName = in.readString();
        this.createTime = new Date(in.readLong());
    }

}

使用kryo注解@Optional可以不序列化该字段

@FieldSerializer.Optional(value = "createTime")
private Date createTime;

方式2:全局配置

kryo:

https://github.com/EsotericSoftware/kryo/pull/417/commits/8aae38d9bb4a67940006d84e5dc818329c698fd4

FieldSerializerConfig config;
config.setSerializeTransient(true);

CachedField[] fields = ArrayUtils.addAll(getFields(), getTransientFields());

fastjson:

启动类或@Baen注入的时候添加

    JSON.DEFAULT_GENERATE_FEATURE = SerializerFeature.config(
            JSON.DEFAULT_GENERATE_FEATURE,
            SerializerFeature.SkipTransientField, false
    );