Spring Boot 使用fastjson序列化對象

一、spring boot默認使用jackson對json序列化和發序列化

可在配置文件中增長默認的時間格式化方式：

spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8

import org.springframework.format.annotation.DateTimeFormat;
import com.fasterxml.jackson.annotation.JsonFormat;
public class MrType {

  @JsonFormat(timezone = "GMT+8",pattern = "yyyy-MM-dd")
  @DateTimeFormat(pattern="yyyy-MM-dd")
  private Date createdDate;
}

二、使用fastjson對json數據序列化和發序列化

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.http.converter.HttpMessageConverter;

@SpringBootApplication
public class MonitorRedbagMqApplication {

    public static void main(String[] args) {
        SpringApplication.run(MonitorRedbagMqApplication.class, args);
    }

   
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        //FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        //FastJsonConfig fastJsonConfig = new FastJsonConfig();
        //fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        //fastConverter.setFastJsonConfig(fastJsonConfig);
        //HttpMessageConverter<?> converter = fastConverter;
        //return new HttpMessageConverters(converter);

        //建立fastJson消息轉換器
        FastJsonHttpMessageConverter fastJsonConverter = new FastJsonHttpMessageConverter();
        //建立配置類
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        //過濾並修改配置返回內容
        fastJsonConfig.setSerializerFeatures(
                //List字段若是爲null,輸出爲[],而非null
                SerializerFeature.WriteNullListAsEmpty,
                //字符類型字段若是爲null,輸出爲"",而非null
                SerializerFeature.WriteNullStringAsEmpty,
                //Boolean字段若是爲null,輸出爲false,而非null
                //SerializerFeature.WriteNullBooleanAsFalse,
                //消除對同一對象循環引用的問題，默認爲false（若是不配置有可能會進入死循環）
                SerializerFeature.DisableCircularReferenceDetect,
                //是否輸出值爲null的字段,默認爲false。
                SerializerFeature.WriteMapNullValue
        );
        //處理中文亂碼問題
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonConverter.setSupportedMediaTypes(fastMediaTypes);
        fastJsonConverter.setFastJsonConfig(fastJsonConfig);

        HttpMessageConverter<?> converter = fastJsonConverter;
        return new HttpMessageConverters(converter);
    }

}

三、測試Java對象

public class MonitorRedbagDto implements Serializable {
    private static final long serialVersionUID = -1600920246142453543L;

    // 紅包ID
    private Integer redbagId;
    // 用戶ID
    private Long userId;
    // 發放時間
    @JSONField(format = "yyyy-MM-dd HH:mm:ss")
    private Date sendTime;

    // setter getter方法
}

若是不用fastjson序列化，返回：

{
  "redbagId": null,
  "userId": 16,
  "sendTime": "2018-03-06T12:04:15.483+0000"
}

使用fastjson序列化，返回：

{
  "userId": 16,
  "sendTime": "2018-03-06 12:04:15"
}