JsonUtils 工具

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.TreeNode;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonNode;
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.deser.YearMonthDeserializer;
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 com.fasterxml.jackson.datatype.jsr310.ser.YearMonthSerializer;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.YearMonth;
import java.time.format.DateTimeFormatter;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class JsonUtils {
    private static final Logger log = LoggerFactory.getLogger(JsonUtils.class);
    public static final ObjectMapper objectMapper = new ObjectMapper();

    public static <T> T from(String json, Class<T> clazz) {
        T t = null;
        if (StringUtils.isBlank(json)) {
            return t;
        } else {
            try {
                t = objectMapper.readValue(json, clazz);
            } catch (JsonProcessingException var4) {
                log.error(var4.getMessage(), var4);
            }

            return t;
        }
    }

    public static <T> T from(String json, TypeReference<T> typeReference) {
        if (StringUtils.isBlank(json)) {
            return null;
        } else {
            Object t = null;

            try {
                t = objectMapper.readValue(json, typeReference);
            } catch (JsonProcessingException var4) {
                log.error(var4.getMessage(), var4);
            }

            return t;
        }
    }

    public static String toJson(Object obj) {
        try {
            return objectMapper.writeValueAsString(obj);
        } catch (Exception var2) {
            log.error(var2.getMessage(), var2);
            return "";
        }
    }

    public static JsonNode toJsonNode(String str) {
        if (StringUtils.isBlank(str)) {
            return null;
        } else {
            try {
                return objectMapper.readTree(str);
            } catch (Exception var2) {
                log.error(var2.getMessage(), var2);
                return null;
            }
        }
    }

    public static <T> T nodeToObject(TreeNode jsonNode, Class<T> classType) {
        try {
            return objectMapper.treeToValue(jsonNode, classType);
        } catch (Exception var3) {
            log.error(var3.getMessage(), var3);
            return null;
        }
    }

    private JsonUtils() {
    }

    static {
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
        javaTimeModule.addSerializer(YearMonth.class, new YearMonthSerializer(DateTimeFormatter.ofPattern("yyyy-MM")));
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        javaTimeModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
        javaTimeModule.addDeserializer(YearMonth.class, new YearMonthDeserializer(DateTimeFormatter.ofPattern("yyyy-MM")));
        objectMapper.registerModule(javaTimeModule);
        objectMapper.setSerializationInclusion(Include.NON_NULL);
    }
}