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不生效官方解决办法

spring boot @ResponseBody转换JSON 时 Date 类型处理方法 ,这里一共有两种不同解析方式(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 没做配置时

  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

  方法一:

  可以在apllication.property加入下面配置就可以

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

  spring.jackson.time-zone=GMT+8

  方法二:

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

  private Date createTime;

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

  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); // 全部格式
fastConverter.setSupportedMediaTypes(supportedMediaTypes);
converters.add(fastConverter);
}
}

  

  方法二:在所需要的字段上配置(比较灵活的方式,根据不同需求转换):

  @JSONField(format="yyyyMMdd")

  private Date createTime;

说明:这里如果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不生效解决如下:

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();
// 创建配置类
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

上一篇:维护满足max(+ or -)min<=k的区间


下一篇:JSON对象的两个方法