JslOrderService/src/main/java/com/qs/cost/common/utils/JsonUtil.java

package com.qs.cost.common.utils;

import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
//import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JavaType;
//import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.List;
import java.util.Map;


/**
 * Jackson json序列化和反序列化工具类
 * @Author JcYen
 * @Date 2019/6/3
 * @Version 1.0
 */
public class JsonUtil {

    /**
     * jackson对象
     */
    static final ObjectMapper MAPPER = new ObjectMapper();

    static {
        MAPPER.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
        MAPPER.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    }

    /**
     * 将对象转换成json字符串。
     */
    public static String objectToJson(Object data) {
    	try {
			String string = MAPPER.writeValueAsString(data);
			return string;
		} catch (JsonProcessingException e) {
			e.printStackTrace();
		}
    	return null;
    }


    /**
     * 将json结果集转化为对象
     *
     * @param jsonData json数据
     * @param beanType 对象中的object类型
     */
    public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
        try {
            T t = MAPPER.readValue(jsonData, beanType);
            return t;
        } catch (Exception e) {
        	e.printStackTrace();
        }
        return null;
    }

    /**
     * 将json数据转换成pojo对象list
     */
    public static <T> List<T> jsonToList(String jsonData, Class<T> beanType) {
    	JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
    	try {
    		List<T> list = MAPPER.readValue(jsonData, javaType);
    		return list;
		} catch (Exception e) {
			e.printStackTrace();
		}
    	return null;
    }

    public static Map<String, Object> jsonToMap(String jsonStr){
        Map<String, Object> json = JSONObject.parseObject(jsonStr, Map.class);
        return json;
    }

}