如何修改jsonschema2pojo-maven-plugin 0.4.11的默认@JsonInclude配置

Hey there, let's figure out why your <inclusionLevel> setting isn't working with jsonschema2pojo-maven-plugin 0.4.11.

The main issue here is that the inclusionLevel parameter wasn't actually available in version 0.4.11 — it was added in later releases (around 0.5.0). So your config isn't being picked up because the plugin doesn't recognize that setting yet.

Here are two ways to fix this:

1. Upgrade the plugin version (Recommended) #

Upgrading to a newer version (0.5.0 or later) will let you use the inclusionLevel parameter as you intended. Just update your plugin config like this:

<plugin>
    <groupId>org.jsonschema2pojo</groupId>
    <artifactId>jsonschema2pojo-maven-plugin</artifactId>
    <version>0.5.0</version> <!-- Or a newer stable version -->
    <configuration>
        <sourceDirectory>${project.basedir}/src/main/resources/schemas</sourceDirectory>
        <targetPackage>com.yourpackage.models</targetPackage>
        <annotationStyle>jackson2</annotationStyle> <!-- Ensure this is set to generate Jackson annotations -->
        <inclusionLevel>ALWAYS</inclusionLevel>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
</plugin>

After upgrading, the plugin will generate classes with @JsonInclude(JsonInclude.Include.ALWAYS) as expected.

2. Use the legacy parameter for 0.4.11 #

If you can't upgrade the plugin for some reason, use the includeNullProperties parameter that was available in 0.4.11. Setting this to true will achieve the same effect (adding @JsonInclude(Include.ALWAYS)):

<plugin>
    <groupId>org.jsonschema2pojo</groupId>
    <artifactId>jsonschema2pojo-maven-plugin</artifactId>
    <version>0.4.11</version>
    <configuration>
        <sourceDirectory>${project.basedir}/src/main/resources/schemas</sourceDirectory>
        <targetPackage>com.yourpackage.models</targetPackage>
        <annotationStyle>jackson2</annotationStyle> <!-- Don't forget this! -->
        <includeNullProperties>true</includeNullProperties>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Just make sure you have annotationStyle set to jackson2 — without this, the plugin won't generate any Jackson @JsonInclude annotations at all.

内容的提问来源于stack exchange，提问作者Dev Gosain