如何读取Properties的配置文件

最新推荐文章于 2024-09-01 15:10:38 发布

原创最新推荐文章于 2024-09-01 15:10:38 发布 · 299 阅读

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本文深入探讨了Dubbo框架中消费者如何通过解析配置文件来获取服务提供者信息的过程。详细介绍了当消费者请求服务时，如何从环境变量或特定配置文件中读取接口地址，以及在未指定时的默认查找路径和解析机制。

参考dubbo的消费者获取接口提供者的init方法

String resolve = System.getProperty(interfaceName);
        String resolveFile = null;
        if (resolve == null || resolve.length() == 0) {
            resolveFile = System.getProperty("dubbo.resolve.file");
            if (resolveFile == null || resolveFile.length() == 0) {
                File userResolveFile = new File(new File(System.getProperty("user.home")), "dubbo-resolve.properties");
                if (userResolveFile.exists()) {
                    resolveFile = userResolveFile.getAbsolutePath();
                }
            }
            if (resolveFile != null && resolveFile.length() > 0) {
                Properties properties = new Properties();
                FileInputStream fis = null;
                try {
                    fis = new FileInputStream(new File(resolveFile));
                    properties.load(fis);
                } catch (IOException e) {
                    throw new IllegalStateException("Unload " + resolveFile + ", cause: " + e.getMessage(), e);
                } finally {
                    try {
                        if (null != fis) fis.close();
                    } catch (IOException e) {
                        logger.warn(e.getMessage(), e);
                    }
                }
                resolve = properties.getProperty(interfaceName);
            }
        }