import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import
 
 org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.text.SimpleDateFormat;
import java.util.List;
import java.util.TimeZone;


@Configuration
 
public class CorsConfig2 implements WebMvcConfigurer {

    private static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedMethods("*")
                .allowedOrigins(
 
"*")
                .allowedHeaders("*");
    }
    //  設定時區 (TimeZone是jdk自帶的時區類，這種方式可以用來設定fastjson、jackson的預設時區)
//    @PostConstruct
//    public void setTimeZone(){
//        TimeZone timeZone = TimeZone.getTimeZone("UTC");
//        TimeZone.setDefault(timeZone);
 //   }

//    設定時區 jackson 設定時區  系統統中就可以設定預設的序列化後格式   如想要返回 yyyy-MM-dd 只需要在
//    jsonformat 註解上加 yyyy-MM-dd
//    spring.jackson.time-zone=GMT+8
    @Bean
    public MappingJackson2HttpMessageConverter jackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        ObjectMapper mapper = new ObjectMapper();
        mapper.setTimeZone(TimeZone.getDefault());
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.setDateFormat(new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS));
        converter.setObjectMapper(mapper);
        return converter;
    }

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(jackson2HttpMessageConverter());
    }


    //    fastjson 設定不了時區
//    @Bean
//    public HttpMessageConverters fastJsonConverters() {
//        FastJsonHttpMessageConverter fastJsonConverter = new FastJsonHttpMessageConverter();
//        FastJsonConfig fastJsonConfig = new FastJsonConfig();
//        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
//        fastJsonConverter.setFastJsonConfig(fastJsonConfig);
//        HttpMessageConverter<?> httpMessageConverter = fastJsonConverter;
//        return new HttpMessageConverters(httpMessageConverter);
//    }
//
//    @Override
//    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
//        FastJsonHttpMessageConverter fastJsonConverter = new FastJsonHttpMessageConverter();
//        FastJsonConfig fastJsonConfig = new FastJsonConfig();
//        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
//        fastJsonConverter.setFastJsonConfig(fastJsonConfig);
//        //converters.add(fastJsonConverter);//這會讓fastJsonConverter排在訊息轉換器管道列表的最後，可能會輪不到它處理訊息轉換
//        converters.add(0, fastJsonConverter);//要顯示指明將fastJsonConverter排在訊息轉換器管道列表的首位
//    }
}

springboot可以通過配置設定jackson時區和時間格式，參考類：org.springframework.boot.autoconfigure.jackson.JacksonProperties

例子：spring.jackson.time-zone=GMT+8

這個時區配置後，feign呼叫也沒有問題了。

轉載：https://blog.csdn.net/qq_36763236/article/details/111866828