JsonUtil.java

package vion.utils;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.json.JsonReadFeature;
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.module.SimpleModule;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
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 lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.dromara.hutool.core.array.ArrayUtil;
import org.dromara.hutool.core.text.StrUtil;

import java.io.IOException;
import java.lang.reflect.Type;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

/**
 * JSON 工具类
 *
 * @author ShuQian_Liu
 */
@Slf4j
public class JsonUtil {

    public static ObjectNode createObj() {
        return getObjectMapper().createObjectNode();
    }

    public static ArrayNode createArr() {
        return getObjectMapper().createArrayNode();
    }

    @SneakyThrows
    public static String toJsonString(Object object) {
        return getObjectMapper().writeValueAsString(object);
    }

    @SneakyThrows
    public static byte[] toJsonByte(Object object) {
        return getObjectMapper().writeValueAsBytes(object);
    }

    @SneakyThrows
    public static String toJsonPrettyString(Object object) {
        return getObjectMapper().writerWithDefaultPrettyPrinter().writeValueAsString(object);
    }

    public static <T> T parseObject(String text, Class<T> clazz) {
        if (StrUtil.isEmpty(text)) {
            return null;
        }
        try {
            return getObjectMapper().readValue(text, clazz);
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, String path, Class<T> clazz) {
        if (StrUtil.isEmpty(text)) {
            return null;
        }
        try {
            JsonNode treeNode = getObjectMapper().readTree(text);
            JsonNode pathNode = treeNode.path(path);
            return getObjectMapper().readValue(pathNode.toString(), clazz);
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, Type type) {
        if (StrUtil.isEmpty(text)) {
            return null;
        }
        try {
            return getObjectMapper().readValue(text, getObjectMapper().getTypeFactory().constructType(type));
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    /**
     * 将字符串解析成指定类型的对象
     * 使用 {@link #parseObject(String, Class)} 时，在@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS) 的场景下，
     * 如果 text 没有 class 属性，则会报错。此时，使用这个方法，可以解决。
     *
     * @param text  字符串
     * @param clazz 类型
     * @return 对象
     */
    public static <T> T parseObject2(String text, Class<T> clazz) {
        if (StrUtil.isEmpty(text)) {
            return null;
        }
        try {
            return getObjectMapper().readValue(text, clazz);
        } catch (JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(byte[] bytes, Class<T> clazz) {
        if (ArrayUtil.isEmpty(bytes)) {
            return null;
        }
        try {
            return getObjectMapper().readValue(bytes, clazz);
        } catch (IOException e) {
            log.error("json parse err,json:{}", bytes, e);
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, TypeReference<T> typeReference) {
        try {
            return getObjectMapper().readValue(text, typeReference);
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    /**
     * 解析 JSON 字符串成指定类型的对象，如果解析失败，则返回 null
     *
     * @param text          字符串
     * @param typeReference 类型引用
     * @return 指定类型的对象
     */
    public static <T> T parseObjectQuietly(String text, TypeReference<T> typeReference) {
        try {
            return getObjectMapper().readValue(text, typeReference);
        } catch (IOException e) {
            return null;
        }
    }

    public static <T> List<T> parseArray(String text, Class<T> clazz) {
        if (StrUtil.isEmpty(text)) {
            return new ArrayList<>();
        }
        try {
            return getObjectMapper().readValue(text, getObjectMapper().getTypeFactory().constructCollectionType(List.class, clazz));
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    public static <T> List<T> parseArray(String text, String path, Class<T> clazz) {
        if (StrUtil.isEmpty(text)) {
            return null;
        }
        try {
            JsonNode treeNode = getObjectMapper().readTree(text);
            JsonNode pathNode = treeNode.path(path);
            return getObjectMapper().readValue(pathNode.toString(), getObjectMapper().getTypeFactory().constructCollectionType(List.class, clazz));
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    public static JsonNode parseTree(String text) {
        try {
            return getObjectMapper().readTree(text);
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    public static JsonNode parseTree(byte[] text) {
        try {
            return getObjectMapper().readTree(text);
        } catch (IOException e) {
            log.error("json parse err,json:{}", text, e);
            throw new RuntimeException(e);
        }
    }

    public static boolean isJson(String jsonString) {
        try {
            getObjectMapper().readTree(jsonString);
            return true;
        } catch (Exception e) {
            return false;
        }
    }

    /**
     * 获取 ObjectMapper 实例
     *
     * @return ObjectMapper
     */
    public static ObjectMapper getObjectMapper() {
        return JacksonHolder.INSTANCE;
    }

    private static class JacksonHolder {
        private static final ObjectMapper INSTANCE = new JacksonObjectMapper();
    }

    private static final String dateTimeFormat = "yyyy-MM-dd HH:mm:ss";
    private static final String dateFormat = "yyyy-MM-dd";
    private static final String timeFormat = "HH:mm:ss";

    private static class JacksonObjectMapper extends ObjectMapper {
        private static final long serialVersionUID = 4288193147502386170L;

        JacksonObjectMapper() {
            super(jsonFactory());
            super.setLocale(Locale.CHINA);
            super.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            // 蛇形命名转换为驼峰命名
            // super.setPropertyNamingStrategy(new PropertyNamingStrategies.SnakeCaseStrategy());
            super.setSerializationInclusion(JsonInclude.Include.NON_NULL);
            // Long 转为 String 防止 js 丢失精度
            SimpleModule simpleModule = new SimpleModule();
            simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
            super.registerModule(simpleModule);
            var module = new JavaTimeModule();
            module.addSerializer(new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(dateTimeFormat)));
            module.addSerializer(new LocalDateSerializer(DateTimeFormatter.ofPattern(dateFormat)));
            module.addSerializer(new LocalTimeSerializer(DateTimeFormatter.ofPattern(timeFormat)));
            module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(dateTimeFormat)));
            module.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(dateFormat)));
            module.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(timeFormat)));
            super.registerModule(module);
            super.findAndRegisterModules();
        }

        JacksonObjectMapper(ObjectMapper src) {
            super(src);
        }

        private static JsonFactory jsonFactory() {
            return JsonFactory.builder()
                    // 可解析反斜杠引用的所有字符
                    .configure(JsonReadFeature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER, true)
                    // 允许JSON字符串包含非引号控制字符（值小于32的ASCII字符，包含制表符和换行符）
                    .configure(JsonReadFeature.ALLOW_UNESCAPED_CONTROL_CHARS, true)
                    .build();
        }

        @Override
        public ObjectMapper copy() {
            return new JacksonObjectMapper(this);
        }
    }

}