# 处理 JSON 的特定记录（JAVO POJO）
<a name="schema-registry-gs-json-java-pojo"></a>

您可以使用普通旧 Java 对象（POJO）并将该对象作为记录传递。这类似于 AVRO 中特定记录的概念。[mbknor-jackson-jsonschema](https://github.com/mbknor/mbknor-jackson-jsonSchema) 可以为传递的 POJO 生成 JSON 架构。此库还可以在 JSON 架构中注入其他信息。

AWS Glue 架构注册表库使用架构中注入的“className”字段提供完全分类的类名称。反序列化程序使用“className”字段，反序列化为该类的对象。

```
 Example class :

@JsonSchemaDescription("This is a car")
@JsonSchemaTitle("Simple Car Schema")
@Builder
@AllArgsConstructor
@EqualsAndHashCode
// Fully qualified class name to be added to an additionally injected property
// called className for deserializer to determine which class to deserialize
// the bytes into
@JsonSchemaInject(
        strings = {@JsonSchemaString(path = "className",
                value = "com.amazonaws.services.schemaregistry.integrationtests.generators.Car")}
)
// List of annotations to help infer JSON Schema are defined by https://github.com/mbknor/mbknor-jackson-jsonSchema
public class Car {
    @JsonProperty(required = true)
    private String make;

    @JsonProperty(required = true)
    private String model;

    @JsonSchemaDefault("true")
    @JsonProperty
    public boolean used;

    @JsonSchemaInject(ints = {@JsonSchemaInt(path = "multipleOf", value = 1000)})
    @Max(200000)
    @JsonProperty
    private int miles;

    @Min(2000)
    @JsonProperty
    private int year;

    @JsonProperty
    private Date purchaseDate;

    @JsonProperty
    @JsonFormat(shape = JsonFormat.Shape.NUMBER)
    private Date listedDate;

    @JsonProperty
    private String[] owners;

    @JsonProperty
    private Collection<Float> serviceChecks;

    // Empty constructor is required by Jackson to deserialize bytes
    // into an Object of this class
    public Car() {}
}
```