javaE中获取项目properties文件中的常量数据

upload.userId = -1
upload.srcSystem = 131452021
upload.token = vfZQIDAQAB
upload.businessId = 111

public class UploadUtil {

    private static Map uploadParamsMap = new HashMap();static {
        Properties props = new Properties();
        StringBuffer whiteList = new StringBuffer();
        try {
            //读取上传配置文件
            ClassPathResource classPathResource = new ClassPathResource("/fileUpload.properties");
            InputStream in = classPathResource.getInputStream();
            InputStreamReader ins = new InputStreamReader(in, "UTF-8");
            props.load(ins);
            in.close();
            ins.close();
        } catch (IOException e) {
            e.printStackTrace();
            //logger.info("读取配置文件 fileUpload.properties 失败，格式不正确！");
        }
        Iterator> it = props.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry