能用FileResourceManager写一个案例吗?
时间: 2023-02-25 22:54:44 浏览: 48
是的,可以使用FileResourceManager编写案例。以下是一个使用FileResourceManager读取文件并打印内容的简单示例:
```
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.yarn.api.records.URL;
import org.apache.hadoop.yarn.util.ConverterUtils;
public class FileResourceManagerExample {
public static void main(String[] args) throws Exception {
String filePath = "hdfs://<namenode>:<port>/path/to/file.txt";
URL url = ConverterUtils.getYarnUrlFromPath(new Path(filePath));
Configuration conf = new Configuration();
FileSystem fs = FileSystem.get(URI.create(url.toString()), conf);
BufferedReader br = new BufferedReader(new InputStreamReader(fs.open(new Path(filePath))));
String line;
while ((line = br.readLine()) != null) {
System.out.println(line);
}
}
}
```
请注意,上面的代码仅供参考,您需要根据实际情况修改`filePath`变量的值,以符合您的文件系统环境。