设置Springboot返回jackson数据序列化

LocalDateTime格式化
使用下面的配置相当于全局配置就不需要给字段添加@JsonFormat(pattern = DateUt.YYYY_MM_DD_HH_MM_SS)
如果个别字段需要不同的配置可使用@JsonFormat(pattern = DateUt.YYYY_MM_DD)，@JsonFormat会优先使用，反序列化亦可使用@JsonFormat注解
 

package com.example.mpdemo.config;

import com.example.mpdemo.common.IBaseEnum;
import com.example.mpdemo.util.DateUt;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import org.springframework.boot.jackson.JsonComponentModule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

/**
 * @from: fhadmin.cn
 * @Date: 2021/8/19
 * @Description: 时间统一格式化
 */
@Configuration
public class JSONFormatConfig {

    private static final DateTimeFormatter ymdhms = DateTimeFormatter.ofPattern(DateUt.YYYY_MM_DD_HH_MM_SS);

    private static final DateTimeFormatter ymd = DateTimeFormatter.ofPattern(DateUt.YYYY_MM_DD);

    private static final DateTimeFormatter hms = DateTimeFormatter.ofPattern(DateUt.HH_MM_SS);

    @Bean
    @Primary
    public ObjectMapper objectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        //序列化设置时间格式
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(ymdhms));
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(ymd));
        javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(hms));
        //反序列化设置时间格式
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(ymdhms));
        javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(ymd));
        javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(hms));

        objectMapper.registerModule(javaTimeModule);
        //序列化枚举值为数据库存储值 缺少后打印枚举不能转成对应值，需自定义toString方法/或者使用@JsonValue注解
        //objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
        //设置序列化枚举格式
        JsonComponentModule jsonComponentModule = new JsonComponentModule();
        jsonComponentModule.addSerializer(IBaseEnum.class,new BaseEnumSerializer());
        objectMapper.registerModule(jsonComponentModule);
        return objectMapper;
    }
}