json处理由fastjson换jackjson

fastjson没有jackjson稳定，所以换成jackjson来处理对象转json和json转对象问题。

首先下载jackjson包，三个都要引用
在这里插入图片描述

然后修改实现类

package JRT.Core.Util;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.lang.reflect.Field;

import static org.apache.logging.log4j.message.MapMessage.MapFormat.JSON;

/**
 * json工具类，处理对象和json
 */
public class JsonUtil {
    /**
     * Object对象转Json串
     *
     * @param object
     * @return
     */
    public static String Object2Json(Object object) throws Exception {
        ObjectMapper objectMapper = new ObjectMapper();
        return objectMapper.writeValueAsString(object);
    }

    /**
     * Object转Json串
     *
     * @param object     对象
     * @param null2empty null值是否转空""
     * @return
     */
    public static String Object2Json(Object object, boolean null2empty) throws Exception {
        if (!null2empty) {
            ObjectMapper objectMapper = new ObjectMapper();
            return objectMapper.writeValueAsString(object);
        } else {
            ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer<Object>() {
                @Override
                public void serialize(Object o, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException {
                    jsonGenerator.writeString("");
                }
            });
            return objectMapper.writeValueAsString(object);
        }
    }

    /**
     * Json串转Object
     *
     * @param json json串
     * @param c    类型
     * @return
     */
    public static Object Json2Object(String json, Class c) throws Exception {
        if (json.isEmpty()) {
            return null;
        } else {
            ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            return objectMapper.readValue(json, c);
        }
    }

    /**
     * 克隆一个对象
     *
     * @param obj 要克隆的对象
     * @return
     */
    public static Object CloneObject(Object obj) throws Exception {
        if (obj==null) {
            return null;
        }
        else {
            ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            String json=Object2Json(obj);
            return objectMapper.readValue(json, obj.getClass());
        }
    }
}

老的fastjson的包装

package JRT.Core.Util;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;

import java.lang.reflect.Field;

/**
 * json工具类，处理对象和json
 */
public class JsonUtil
{
    /**
     * Object对象转Json串
     * @param object
     * @return
     */
    public static String Object2Json(Object object)
    {
        return JSONObject.toJSONString(object, SerializerFeature.PrettyFormat);
    }

    /**
     * Object转Json串
     * @param object 对象
     * @param null2empty null值是否转空""
     * @return
     */
    public static String Object2Json(Object object, boolean null2empty)
    {
        if (!null2empty)
        {
            return JSON.toJSONString(object);
        }
        else
        {
            return JSON.toJSONString(object, SerializerFeature.WriteNullStringAsEmpty, SerializerFeature.PrettyFormat);
        }
    }

    /**
     * Json串转Object
     * @param json json串
     * @param c 类型
     * @return
     */
    public static Object Json2Object(String json,Class c)
    {
        if (json.isEmpty())
        {
            return null;
        }
        else
        {
            return JSON.parseObject(json,c);
        }
    }
}