带有自定义注释的 JSON 到 POJO

我试图在从 JSON 生成的 Java 代码中包含 Spring Boot 注释，如下所示：

@Entity
public class Person {
...
}

and

@Repository
public interface PersonRepository extends CrudRepository<Person, Long> 
{
}

我正在从 JSON 转换为 POJO本教程 http://www.littlebigextra.com/how-to-convert-json-schema-to-java-classes-using-maven-plugin/#Add-jsonschema2pojo-maven-plugin-in-POMXML。我可以在 json 文件中添加什么以使生成的 Java 类包含注释 @Entity 和 @Repository？我还没有找到有关如何提供自定义注释的教程或解释。

jsonschema2pojo https://github.com/joelittlejohn/jsonschema2pojo/issues/524看起来它可以在生成类时使用自定义注释器，但我想知道 Jackson 是否有内置的东西可以轻松允许自定义注释？

jsonschema2pojo 的 customAnnotator 允许我向生成的 java 文件添加自定义注释。令人烦恼的是你的注释器类必须位于单独的项目中并且必须包含在插件中. 这就是为什么 https://github.com/joelittlejohn/jsonschema2pojo/issues/722#issuecomment-299455246.

将依赖项添加到您的 pom.xml

<dependency>
    <groupId>org.jsonschema2pojo</groupId>
    <artifactId>jsonschema2pojo-core</artifactId>
    <version>0.4.0</version>
</dependency>

将插件添加到 pom.xml 插件中

<plugin>
    <groupId>org.jsonschema2pojo</groupId>
    <artifactId>jsonschema2pojo-maven-plugin</artifactId>
    <version>0.5.1</version>
    <dependencies>
        <!-- NOTE: Your annotator MUST come from a dependency -->
        <dependency>
            <groupId>ANNOTATOR_GROUP_ID</groupId>
            <artifactId>ANNOTATOR_ARTIFACT</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <scope>compile</scope>
            <version>1.5.2.RELEASE</version>
        </dependency>
       <!-- NOTE: Any annotation used must have its dependency here!!! -->
    </dependencies>
    <configuration>
        <sourceDirectory>${basedir}/src/main/resources/schema</sourceDirectory>
        <targetPackage>com.test.gen</targetPackage>
        <useCommonsLang3>true</useCommonsLang3>
        <customAnnotator>com.fully.qualified.path.YourAnnotator</customAnnotator>
    </configuration>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
</plugin>

创建您的自定义注释器类一个单独的项目.

package com.deere.gtin_k.pdeaas.work_manager.application;

import com.fasterxml.jackson.databind.JsonNode;
import com.sun.codemodel.JDefinedClass;
import com.sun.codemodel.JFieldVar;
import org.jsonschema2pojo.AbstractAnnotator;

import javax.persistence.Entity;

public class HibernateAnnotator extends AbstractAnnotator {

    @Override
    public void propertyField(JFieldVar field, JDefinedClass clazz, String propertyName, JsonNode propertyNode) {
        super.propertyField(field, clazz, propertyName, propertyNode);

        // Note: does not have to be the propertyName, could be the field or propertyNode that is verified.
        if (propertyName.equals("entity")) {
            clazz.annotate(Entity.class);
        }
    }
}

最后是json文件：

{
  "title": "Person",
  "type": "object",
  "properties": {
    "entity": true,
    "name": {
      "type": "string"
    }
  }
}

最终结果：

package com.test.gen;

import java.util.HashMap;
import java.util.Map;
import javax.persistence.Entity;
import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.commons.lang3.builder.ToStringBuilder;


/**
 * Person
 * <p>
 * 
 * 
 */
@JsonInclude(JsonInclude.Include.NON_NULL)
@Entity
@JsonPropertyOrder({
    "entity",
    "name"
})
public class Person {

    @JsonProperty("entity")
    private Object entity;
    ...
}

我希望有一种更简单的方法来做到这一点。