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<String, Object> 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<Map.Entry<Object, Object>> it = props.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry<Object, Object> entry = it.next();
            String key = entry.getKey() == null ? "" : entry.getKey().toString();
            String value = entry.getValue() == null ? "" : entry.getValue().toString();
            if (StringUtils.isNotBlank(key)) {
                //获取上传参数
                if (key.startsWith("upload") && key.indexOf(".") != -1) {
                    String[] keys = key.split("\\.");
                    if (keys.length >= 2) {
                        uploadParamsMap.put(keys[1], value);

                    }
                }
                
            }
        }

    }
}