在Java SpringBoot中将枚举多值转换为Json

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>

public enum Color {
    RED,
    GREEN,
    BLUE
}

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;

public class ColorSerializer extends JsonSerializer<Color> {

    @Override
    public void serialize(Color color, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
        jsonGenerator.writeString(color.name().toLowerCase());
    }
}

import com.fasterxml.jackson.databind.annotation.JsonSerialize;

@JsonSerialize(using = ColorSerializer.class)
public enum Color {
    RED,
    GREEN,
    BLUE
}

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {

    public static void main(String[] args) throws IOException {
        ObjectMapper objectMapper = new ObjectMapper();
        Color color = Color.RED;
        String json = objectMapper.writeValueAsString(color);
        System.out.println(json);
    }
}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AppConfig {

    @Bean
    public ColorSerializer colorSerializer() {
        return new ColorSerializer();
    }
}