JSONUtil，POJO实体类和JSON互转，

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.configurationprocessor.json.JSONArray;
import org.springframework.boot.configurationprocessor.json.JSONException;
import org.springframework.boot.configurationprocessor.json.JSONObject;

import java.io.IOException;

/**
 * @author valley
 * @create 2018 - 05 - 21 13:32
 */
public class JSONUtil {
    /**
     * 将json转化为实体POJO
     * @param jsonStr
     * @param obj
     * @return
     */
    public static<T> Object JSONToObj(String jsonStr,Class<T> obj) {
        T t = null;
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            t = objectMapper.readValue(jsonStr,
                    obj);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return t;
    }

    /**
     * 将实体POJO转化为JSON
     * @param obj
     * @return
     * @throws JSONException
     * @throws IOException
     */
    public static<T> JSONObject objectToJson(T obj) throws JSONException, IOException {
        ObjectMapper mapper = new ObjectMapper();
        // Convert object to JSON string
        String jsonStr = "";
        try {
            jsonStr =  mapper.writeValueAsString(obj);
        } catch (IOException e) {
            throw e;
        }
        return new JSONObject(jsonStr);
    }

}