Jackson通用工具类

    compile group: 'com.fasterxml.jackson.core', name: 'jackson-core', version: '2.11.1'

    compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.11.1'

import com.fasterxml.jackson.annotation.JsonInclude;

import com.fasterxml.jackson.core.JsonGenerator;

import com.fasterxml.jackson.core.JsonParser;

import com.fasterxml.jackson.core.JsonProcessingException;

import com.fasterxml.jackson.core.type.TypeReference;

import com.fasterxml.jackson.databind.*;

import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;

import lombok.SneakyThrows;

import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

import java.time.Instant;

import java.time.ZoneId;

import java.time.ZonedDateTime;

@Slf4j

public class Json {

    private static ObjectMapper MAPPER;

    static {

        JavaTimeModule javaTimeModule = new JavaTimeModule();

        javaTimeModule.addSerializer(ZonedDateTime.class, new JsonSerializer<ZonedDateTime>() {

            @Override

            public void serialize(ZonedDateTime value, JsonGenerator gen, SerializerProvider serializers)

                    throws IOException {

                gen.writeNumber(value.toInstant().toEpochMilli());

            }

        });

        javaTimeModule.addDeserializer(ZonedDateTime.class, new JsonDeserializer<ZonedDateTime>() {

            @Override

            public ZonedDateTime deserialize(JsonParser p, DeserializationContext ctxt)

                    throws IOException, JsonProcessingException {

                return ZonedDateTime.ofInstant(Instant.ofEpochMilli(p.readValueAs(Long.class)), ZoneId.systemDefault());

            }

        });

        ObjectMapper objectMapper = new ObjectMapper();

        objectMapper.setDefaultPropertyInclusion(JsonInclude.Include.NON_NULL);

        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES,false);

        objectMapper.registerModule(javaTimeModule);

        MAPPER = objectMapper;

    }

    public static ObjectMapper getMapper() {

        return MAPPER;

    }

    @SneakyThrows

    public static String toJson(Object object) {

        return MAPPER.writeValueAsString(object);

    }

    @SneakyThrows

    public static <T> T toObject(String json, Class<T> clazz) {

        return MAPPER.readValue(json, clazz);

    }

    public static <T> T toObject(Object object, Class<T> clazz) {

        return MAPPER.convertValue(object, clazz);

    }

    @SneakyThrows

    public static <T> T toObject(String json, TypeReference<T> type) {

        return MAPPER.readValue(json, type);

    }

    public static <T> T toObject(Object object, TypeReference<T> type) {

        return MAPPER.convertValue(object, type);

    }

}

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Jackson通用工具类

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