Springboot2之jackson Java8日期格式化处理

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import org.apache.commons.lang3.StringUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.convert.converter.Converter;
import org.springframework.lang.NonNull;

import java.io.IOException;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.TimeZone;

/**
 * jackson2 日期序列化和反序列化处理
 *
 */
@Configuration
public class DateConverterConfig {

    private static final DateTimeFormatter DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm:ss");

    /**
     * jackson2 json序列化 null字段输出为空串
     *
     * @return
     * @author zhaoyang10
     */
    @Bean
    @Primary
    //@ConditionalOnMissingBean(ObjectMapper.class)
    public ObjectMapper serializingObjectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();

        JavaTimeModule javaTimeModule = new JavaTimeModule();
        //不再做统一处理 Springcloud2 fegin 会报日期格式化错误 格式化的日期字段直接加@JsonFormat 注解处理
        //序列化日期格式
        //javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer());
        //javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer());
        //javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer());

        //反序列化日期格式
        //javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer());
        //javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer());
        //javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer());

        objectMapper.registerModule(javaTimeModule);

		objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
		objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        objectMapper.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));

        return objectMapper;
    }


    /**
     * 日期序列化
     */
    public class LocalDateTimeSerializer extends JsonSerializer<LocalDateTime> {

        @Override
        public void serialize(LocalDateTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            gen.writeString(value.format(DATETIME_FORMATTER));
        }
    }

    /**
     * 日期反序列化
     */
    public class LocalDateTimeDeserializer extends JsonDeserializer<LocalDateTime> {

        @Override
        public LocalDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
            return LocalDateTime.parse(p.getValueAsString(), DATETIME_FORMATTER);
        }
    }

    /**
     * 日期序列化
     */
    public class LocalDateSerializer extends JsonSerializer<LocalDate> {

        @Override
        public void serialize(LocalDate value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            gen.writeString(value.format(DATE_FORMATTER));
        }
    }

    /**
     * 日期反序列化
     */
    public class LocalDateDeserializer extends JsonDeserializer<LocalDate> {

        @Override
        public LocalDate deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
            return LocalDate.parse(p.getValueAsString(), DATE_FORMATTER);
        }
    }

    /**
     * 日期序列化
     */
    public class LocalTimeSerializer extends JsonSerializer<LocalTime> {

        @Override
        public void serialize(LocalTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
            gen.writeString(value.format(TIME_FORMATTER));
        }
    }

    /**
     * 日期反序列化
     */
    public class LocalTimeDeserializer extends JsonDeserializer<LocalTime> {

        @Override
        public LocalTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
            return LocalTime.parse(p.getValueAsString(), TIME_FORMATTER);
        }
    }

    /**
     * 接收前端入参日期的转换处理
     *
     * @return
     */
    @Bean
    public Converter<String, LocalDateTime> LocalDateTimeConvert() {
        return new Converter<String, LocalDateTime>() {
            @Override
            public LocalDateTime convert(@NonNull String source) {
                LocalDateTime date = null;
                if (StringUtils.isNotBlank(source)) {
                    date = LocalDateTime.parse(source, DATETIME_FORMATTER);
                }
                return date;
            }
        };
    }

    @Bean
    public Converter<String, LocalDate> LocalDateConvert() {
        return new Converter<String, LocalDate>() {
            @Override
            public LocalDate convert(@NonNull String source) {
                LocalDate date = null;
                if (StringUtils.isNotBlank(source)) {
                    date = LocalDate.parse(source, DATE_FORMATTER);
                }
                return date;
            }
        };
    }

    @Bean
    public Converter<String, LocalTime> LocalTimeConvert() {
        return new Converter<String, LocalTime>() {
            @Override
            public LocalTime convert(@NonNull String source) {
                LocalTime time = null;
                if (StringUtils.isNotBlank(source)) {
                    time = LocalTime.parse(source, TIME_FORMATTER);
                }
                return time;
            }
        };
    }

}