java获取propertis文件

public class PasmpProperties {
    private static Properties properties = null;

    protected static synchronized Properties getGridProperties() {
        if (properties == null) {
            properties = new Properties();
            URL url = ClassLoader.getSystemResource("context-pasmp.properties");
            try {
                properties.load(url.openStream());
            } catch (IOException e) {
                PasmpLogger.error("", PasmpProperties.class, "getGridProperties", "读取context-pasmp.properties失败!", e);
            }
        }
        return properties;
    }

}