使用java代码读取存储在hdfs中的.properties文件

我需要读取hdfs中可用的.properties文件。我正在使用下面的代码，但它抛出了一个运行时错误

FileSystem fs = FileSystem.get(config);

    Properties conf = wc.createConfiguration();
    Properties prop = new Properties();
    String appPath = "hdfs://clusterdb05.com:8020/user/cmahajan/" + version + "/apps/apps/";
    conf.setProperty(OozieClient.APP_PATH,appPath);
    FileInputStream f = new FileInputStream("hdfs://clusterdb05.com:8020/user/cmahajan/app.properties");
    ObjectInputStream f = new ObjectInputStream(fs.open(new Path("/user/cmahajan/app.properties")));

运行时错误为：

LaunchJob.java:28: cannot find symbol

symbol  : class ObjectInputStream
location: class LaunchJob
    ObjectInputStream f = new ObjectInputStream(fs.open(new Path("/user/cmahajan/app.properties")));
    ^
LaunchJob.java:28: cannot find symbol
symbol  : class ObjectInputStream
location: class LaunchJob
    ObjectInputStream f = new ObjectInputStream(fs.open(new Path("/user/cmahajan/app.properties")));

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使用类的完全限定名称：

java.io.ObjectInputStream 

或

使用以下行导入类：

import java.io.ObjectInputStream;

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要从hdfs加载属性文件，请执行以下操作：

确保ur核心站点.xml，hdfs站点xml文件路径

hdfs端口号（将在核心站点.xml中提供）

替换getProperty中的键

       String CURRENCIES_DIM1 = null;
       String DATES_DIM2 = null; 
       Configuration conf = new Configuration();
        conf.addResource(new Path("/usr/local/hadoop/etc/hadoop/core-site.xml"));
        conf.addResource(new Path("/usr/local/hadoop/etc/hadoop/hdfs-site.xml"));
        String filePath = "hdfs://localhost:54310/user/CurrencyCache.properties";
        Path path = new Path(filePath);
        FileSystem fs = path.getFileSystem(conf);
        try (FSDataInputStream currencyInputStream = fs.open(path)) {
            Properties currencyProp = new Properties();
            currencyProp.load(currencyInputStream);
            CURRENCIES_DIM1= currencyProp.getProperty("key");//getting the 'CURRENCIES_DIM' file path from properties file
            DATES_DIM2= currencyProp.getProperty("key");            //getting the 'DATES_DIM' file path from properties file

        } catch (IOException e) {

            e.printStackTrace();
        }
        fs.close();

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包括导入在内的完整代码是什么？您似乎缺少一个导入java.io.ObjectInputStream的

。但现在它在第行给出了StreamCorruptedException：“ObjectInputStream f=newObjectInputStream（fs.open（new Path（“/user/cmahajan/app.properties”））；”。有什么已知的原因吗？我可能不知道确切的原因，但这意味着您正在读取的数据没有按照预期的格式格式化。请参阅：