spring boot @ResponseBody转换JSON 时 Date 类型处理方法,Jackson和FastJson两种方式,springboot 2.0.9配置fastjson不生效官方解决

spring boot @ResponseBody转换JSON 时 Date 类型处理方法 ,这里一共有两种不一样解析方式(Jackson和FastJson两种方式,springboot我用的1.x的版本)

第一种方式:默认的json处理是 jackson 也就是对configureMessageConverters 没作配置时html

  mybatis数据查询返回的时间,是一串数字,如何转化成时间。两种方法,推荐第一种java

  方法一:spring

  能够在apllication.property加入下面配置就能够json

  #时间戳统一转换
  spring.jackson.date-format=yyyy-MM-dd HH:mm:ssspring-mvc

  spring.jackson.time-zone=GMT+8springboot

 

  方法二:mybatis

  @JsonFormat(timezone = "GMT+8", pattern = "yyyyMMddHHmmss")mvc

  private Date createTime;ide

 

第二种方式:当configureMessageConverters 配置为FasJson处理时;spring-boot

  方法一:全局配置:    fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

@Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);

        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();

        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.WriteNullStringAsEmpty
        );

       //此处是全局处理方式
        fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");

        fastConverter.setFastJsonConfig(fastJsonConfig);

        List<MediaType> supportedMediaTypes = new ArrayList<MediaType>();
        supportedMediaTypes.add(MediaType.ALL); // 所有格式
        fastConverter.setSupportedMediaTypes(supportedMediaTypes);
        converters.add(fastConverter);
    }    
}

  

  方法二:在所须要的字段上配置(比较灵活的方式,根据不一样需求转换):

  @JSONField(format="yyyyMMdd")

  private Date createTime;

说明:这里若是字段和全局都配置了 ,最后是以全局转换

 

重要补充:

当springboot版本是2.0.9以上配置fastjson不生效解决以下:

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.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.StringHttpMessageConverter;

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

@Configuration
public class MyConfiguration {

    @Bean
    public HttpMessageConverters customConverters() {
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 建立配置类
        FastJsonConfig config = new FastJsonConfig();
        config.setSerializerFeatures(
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.WriteNullStringAsEmpty
        );

        //此处是全局处理方式
        config.setDateFormat("yyyy-MM-dd HH:mm:ss");
        config.setCharset(Charset.forName("UTF-8"));
        fastConverter.setFastJsonConfig(config);

        List<MediaType> supportedMediaTypes = new ArrayList<>();
        supportedMediaTypes.add(MediaType.ALL);
        fastConverter.setSupportedMediaTypes(supportedMediaTypes);
        //支持text 转string
        StringHttpMessageConverter stringHttpMessageConverter = new StringHttpMessageConverter();
        return new HttpMessageConverters(fastConverter, stringHttpMessageConverter);
    }

 

 参考spring官网文档:https://docs.spring.io/spring-boot/docs/2.0.9.BUILD-SNAPSHOT/reference/htmlsingle/#boot-features-spring-mvc-message-converters

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