springboot读取配置文件

import com.alibaba.fastjson.JSON;
import com.netposa.zhsq.base.log.PbdLogger;
import com.netposa.zhsq.modules.vehicle.entity.AcrossVehicle;
import com.sun.org.apache.xpath.internal.SourceTree;
import org.apache.commons.io.FileUtils;

import java.io.*;
import java.sql.SQLOutput;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import com.alibaba.fastjson.JSONObject;
import org.springframework.util.ResourceUtils;

public class ToolFileUtils {

    private static PbdLogger LOG = PbdLogger.getLogger(ToolFileUtils.class);

    public static JSONObject getJSONObjectFromFile(String fileName) {
        File file;
        JSONObject jsonObject = null;
        try {
            file = ResourceUtils.getFile("classpath:templates/" + fileName);
            if (!file.exists()) {
                LOG.info(fileName + "文件不存在");
                return null;
            }
            String content = FileUtils.readFileToString(file, "UTF-8");
            jsonObject = JSON.parseObject(content);
        } catch (IOException e) {
            LOG.error("读取"+fileName+"文件失败-----" + e.getMessage());
        }
        return jsonObject;
    }

    public static void main(String[] args) {
//        JSONObject jsonObject = getJSONObjectFromFile("warnedfaces.json");
//        System.out.println(jsonObject);

        JSONObject jsonObject = ToolFileUtils.getJSONObjectFromFile("vehicle.json");
        String listStr = jsonObject != null ? jsonObject.getString("list") : null;
        List<AcrossVehicle> list = JSON.parseArray(listStr,AcrossVehicle.class);
        System.out.println(list.size());
        System.out.println( new Random().nextInt(list.size()));
    }

}