將HDFS中指定文件的內容輸出到終端。

import java.io.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.*;

public class C_ReadFile {
    public static void main(String[] args) {
        try {
            Var_init var = new Var_init();
            var.in = var.fs.open(var.p_remoteFilePath);
            BufferedReader d = new BufferedReader(new InputStreamReader(var.in));
            String line;
            while ((line = d.readLine()) != null) {
                System.out.println(line);
            }
            System.out.println("read successfully");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Var_init類參考 https://www.cnblogs.com/MiraculousB/p/13848744.html