关于java:JsonUtils简单使用

package com.bbzn.device.client.utils;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;import com.alibaba.fastjson.TypeReference;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.IOException;import java.lang.reflect.Type;import java.util.HashMap;import java.util.Map;/** * @Author wulongbo * @Date 2020/7/6 15:43 * @Version 1.0 */public class JsonUtils {    private static final Logger log = LoggerFactory.getLogger(JsonUtils.class);    /**     * byte数组转换成Json     *     * @param array     * @return JSONObject     */    public static JSONObject byteToJson(byte[] array) {        String body = JSONArray.toJSONString(array); // 先转换成Json String        byte[] json = JSONObject.parseObject(body, byte[].class);//转json byte        String convent = new String(json); // byte数组转换成String        JSONObject jsonObject = JSONObject.parseObject(convent);        return jsonObject;    }    /**     * byte数组转换成Java bean     *     * @param array     * @return JSONObject     */    public static <T> T byteToJaveBean(byte[] array, Class<T> clazz) throws InstantiationException, IllegalAccessException {        JSONObject jsonObject = byteToJson(array);        T obj = clazz.newInstance();        return jsonObject.toJavaObject((Type) obj.getClass());    }    /**     * String转换成Json     *     * @param key     * @return JSONObject     */    public static JSONObject stringToJson(String key) {        return JSONObject.parseObject(key);    }    /**     * Java对象转换成String     *     * @return     */    public static String objectToString(Object object) {        return JSONArray.toJSONString(object);    }    /**     * Java bean 转换成 JSONObject     *     * @return     */    public static JSONObject beanToJSONObject(Object object) {        return JSONObject.parseObject(JSONObject.toJSON(object).toString());    }    /**     * 将map转换成byte[]     *     * @return     */    public static byte[] changeMapToByte(Map<String, Object> map) {        byte[] bytes = null;        try {            bytes = serilizableForMap(map).getBytes();        } catch (Exception e) {            log.error("map到byte[]转换异样", e);        }        return bytes;    }    /**     * 将byte[]转换成map     *     * @return     */    public static Map<String, String> changeByteToMap(byte[] bytes) {        Map<String, String> retmap = null;        try {            if (bytes != null) {                retmap = deserilizableForMapFromFile(new String(bytes), String.class);            } else {                log.error("changeByteToMap中bytes为null");            }        } catch (Exception e) {            log.error("byte到map转换异样", e);        }        return retmap;    }    /* 将HashMap序列化为字符串存入json文件中 */    public static String serilizableForMap(Object objMap)            throws IOException {        String listString = JSON.toJSONString(objMap, true);// (maps,CityEntity.class);        return listString;    }    /* 将json文件中的内容读取进去，反序列化为HashMap */    public static <T, K> HashMap<K, T> deserilizableForMapFromFile(String listString2, Class<T> clazz) throws IOException {        Map<K, T> map = JSON.parseObject(listString2, new TypeReference<Map<K, T>>() {        });        return (HashMap<K, T>) map;    }}