FastJson 的一些配置

主要提到：關閉循環引用的配置

"$ref":"$.data[0].detail.wmsInboundorder.details[1]"

如下：

import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;


@Configuration
public class FastJSONConfiguration {

   //避免ASMSerializer一直新建，導致的內存溢出
   private final static SerializeConfig config = new SerializeConfig();

   @Bean
   public HttpMessageConverters httpMessageConverters() {
      HttpMessageConverter<?> fastjson = fastJsonHttpMessageConverter();
      return new HttpMessageConverters(fastjson);
   }
   
   @Bean
   public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
      FastJsonHttpMessageConverter messageConverter = new FastJsonHttpMessageConverter();
      //set MediaTypes
      List<MediaType> supportedMediaTypes = new ArrayList<MediaType>();
      supportedMediaTypes.add(MediaType.APPLICATION_JSON);
      supportedMediaTypes.add(MediaType.TEXT_HTML);
      supportedMediaTypes.add(MediaType.TEXT_PLAIN);
      messageConverter.setSupportedMediaTypes(supportedMediaTypes);

      //fastJsonConfig
      FastJsonConfig fastJsonConfig = new FastJsonConfig();
      fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
      fastJsonConfig.setCharset(Charset.forName("UTF-8"));
      fastJsonConfig.setSerializerFeatures(
            SerializerFeature.QuoteFieldNames, // 雙引號
            SerializerFeature.WriteMapNullValue, // 輸入空值字段
            SerializerFeature.WriteEnumUsingToString, // 枚舉輸出STRING
            SerializerFeature.WriteNullBooleanAsFalse, // 布爾類型如果爲null輸出false
            SerializerFeature.WriteNullListAsEmpty, // List字段如果爲null輸出爲[]
            //SerializerFeature.WriteNullNumberAsZero, // number類型如果爲null輸出0
            //SerializerFeature.WriteNullStringAsEmpty, // 字符串類型如果爲null輸出""
            SerializerFeature.SortField, // 按字段名稱排序後進行輸出
            SerializerFeature.WriteDateUseDateFormat,// 設置日期格式
            SerializerFeature.DisableCircularReferenceDetect
      );
      fastJsonConfig.setSerializeConfig(config);
      
      messageConverter.setFastJsonConfig(fastJsonConfig);
      return messageConverter;
   }
   
   
}