SpringBoot 配置返回前端固定格式yyyy-MM-dd HH:mm:ss和接收ISO时间自动转为LocalDateTime

• 参考链接出处
• 修改后的代码(包括引用的出处)
• • 有解释不清问题请留言,希望能帮到你!

https://blog.csdn.net/qq_42937522/article/details/110310826

import cn.hutool.core.date.DatePattern;
import cn.hutool.core.date.LocalDateTimeUtil;
import cn.hutool.core.util.StrUtil;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.converter.Converter;

import java.io.IOException;
import java.time.LocalDateTime;



@Configuration
public class JacksonCustomizerConfig {

    
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> {
            builder.serializerByType(LocalDateTime.class, new LocalDateTimeSerializer());
            builder.deserializerByType(LocalDateTime.class, new LocalDateTimeDeserializer());
        };
    }

    
    public static class LocalDateTimeSerializer extends JsonSerializer {
        @Override
        public void serialize(LocalDateTime value, JsonGenerator gen, SerializerProvider serializers)
                throws IOException {
            if (value != null) {
                String timestamp = LocalDateTimeUtil.format(value, DatePattern.NORM_DATETIME_PATTERN);
                gen.writeNumber(timestamp);
            }
        }
    }

    
    public static class LocalDateTimeDeserializer extends JsonDeserializer {
        @Override
        public LocalDateTime deserialize(JsonParser p, DeserializationContext deserializationContext)
                throws IOException {
            String timestamp = p.getValueAsString();
            if (StrUtil.isNotEmpty(timestamp)) {
                return LocalDateTimeUtil.parse(timestamp);
            } else {
                return null;
            }
        }
    }

    
    @Bean
    public Converter localDateTimeConverter() {
        return new Converter() {
            @Override
            public LocalDateTime convert(String source) {
                //毫秒级时间戳转LocalDateTime
                return LocalDateTimeUtil.parse(source);
            }
        };
    }
}