package cn.superdesk.uniorder.config.response.json;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

import java.io.IOException;

/**
 * @Description: 现在发现这个设定还是有坑的 20211027
 * @Author: linjinyu
 * @CreateDate: 8/20/20 7:38 PM
 * @UpdateUser: linjinyu
 * @UpdateDate: 8/20/20 7:38 PM
 * @UpdateRemark: 修改内容
 * @Version: 1.0
 */
@Configuration
public class JacksonConfig {

	@Bean
	@Primary
	@ConditionalOnMissingBean(ObjectMapper.class)
	public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {

		ObjectMapper objectMapper = builder.createXmlMapper(false).build();
		objectMapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer<Object>() {
			@Override
			public void serialize(Object o, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
				jsonGenerator.writeString("");
			}
		});

		return objectMapper;
	}
}
