lvyuou/JsonUtils.java

package com.gk.study.utils;

import com.baomidou.mybatisplus.core.toolkit.ArrayUtils;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.List;

public class JsonUtils {
    private static final ObjectMapper objectMapper = new ObjectMapper();

    public static String toJsonString(Object object) {
        try {
            return objectMapper.writeValueAsString(object);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, Class<T> clazz) {
        if (StringUtils.isEmpty(text)) {
            return null;
        }
        try {
            return objectMapper.readValue(text, clazz);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(byte[] bytes, Class<T> clazz) {
        if (bytes == null || bytes.length <= 0) {
            return null;
        }
        try {
            return objectMapper.readValue(bytes, clazz);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> T parseObject(String text, TypeReference<T> typeReference) {
        try {
            return objectMapper.readValue(text, typeReference);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static <T> List<T> parseArray(String text, Class<T> clazz) {
        if (StringUtils.isEmpty(text)) {
            return new ArrayList<>();
        }
        try {
            return objectMapper.readValue(text, objectMapper.getTypeFactory().constructCollectionType(List.class, clazz));
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}