The default serialization framework used by Dubbo is Hessian 2.0. Hessian is a binary-based serialization protocol, which is simple and efficient, and is suitable for network transmission and storage of data. Hessian is widely used in Dubbo because it can serialize and deserialize objects between different programming languages.
In addition to Hessian, Dubbo also supports other serialization frameworks, and you can choose to use a specific serialization framework through configuration. The following are some common serialization frameworks supported by Dubbo:
1. Java default serialization
Dubbo also supports Java's default serialization method, which uses the java.io.Serializable interface for serialization and deserialization. However, this approach is relatively inefficient and sensitive to object definition and structure.
2.JSON
Dubbo also supports serialization and deserialization using JSON. JSON is a common text format that is easy to understand and process. Dubbo uses some JSON libraries (such as Jackson, Fastjson, etc.) to realize the conversion between objects and JSON.
3.Protobuf
Dubbo also supports serialization and deserialization using Google's Protobuf (Protocol Buffers). Protobuf is a language-independent, platform-independent, and extensible serialization framework that is efficient, compact, and supports version compatibility and cross-language interoperability.
4.Avro
Dubbo also provides support for Apache Avro. Avro is a schema-based serialization framework with flexible schema evolution and dynamic types, suitable for large-scale data processing.
5. Kryo
Dubbo also supports serialization and deserialization using Kryo. Kryo is a fast and efficient serialization library, especially suitable for large-scale data transmission and storage.
The above are some common serialization frameworks. Dubbo provides flexible configuration options, and you can choose a suitable serialization framework according to actual needs.