How Can I Generate Java Classes from JSON Using the jsonschema2pojo Maven Plugin?

Generating Java Classes from JSON through Maven

In this scenario, you aim to generate Java source files from a provided JSON representation, which would resemble the structure outlined in the sample JSON. The objective is to create Java classes like 'Address' and 'Person' with methods that align with the JSON keys, enabling access to its data.

To achieve this in a Java Maven project, you can employ the jsonschema2pojo Maven plugin:

<plugin>
    <groupid>org.jsonschema2pojo</groupid>
    <artifactid>jsonschema2pojo-maven-plugin</artifactid>
    <version>1.0.2</version>
    <configuration>
        <sourcedirectory>${basedir}/src/main/resources/schemas</sourcedirectory>
        <targetpackage>com.myproject.jsonschemas</targetpackage>
        <sourcetype>json</sourcetype>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
</plugin>

The json parameter specifies that the sources are JSON (as mentioned in the original post). If you're working with JSON schemas, this line can be omitted.

If your JSON is represented in a schema format, you can specify the schema file location instead of . The plugin will then generate Java classes based on the provided schema.

This solution uses an open-source project called jsonschema2pojo, which generates Java classes based on either JSON schemas or pure JSON documents. This allows you to define your data models in JSON and automatically create corresponding Java classes, making the integration of JSON data in your Java applications seamless.

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