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JSON Serialization Handler

JSON serialization handlers are located in the net.hasor.dbvisitor.types.handler.json package. Through serialization handlers, you can store Java objects as JSON in text columns of the database.

Use in object mapping

public class User {
    @Column(typeHandler = JsonTypeHandler.class)
    private UserExtInfo moreInfo;

    // getters and setters omitted
}

Use in SQL statements

update users
set more_info = #{arg1, typeHandler=net.hasor.dbvisitor.types.handler.json.JsonTypeHandler}
where id = #{arg0}

info

Before using JSON serialization handlers, you need to add the corresponding JSON library dependency to your project.

Built-in Implementations

JSON Serialization

Handler	Description
JsonTypeHandler	Auto-detects, tries Jackson → Gson → Fastjson → Fastjson2 in order to find an available JSON library
JsonUseForJacksonTypeHandler	Uses Jackson
JsonUseForGsonTypeHandler	Uses Gson
JsonUseForFastjsonTypeHandler	Uses Fastjson
JsonUseForFastjson2TypeHandler	Uses Fastjson2

BSON Serialization

Handler	Description
BsonTypeHandler	Uses MongoDB BSON library for serialization/deserialization
BsonListTypeHandler	BSON-based handling for List, Set and other collection fields, with automatic generic type detection