Maven：

    org.apache.hadoop
    hadoop-client
    3.1.4

    Gradle：
    providedCompile group: ‘org.apache.hadoop’, name: ‘hadoop-hdfs-client’, version: ‘3.1.4’

    java 连接hdfs

    import java.io.IOException;
    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.fs.;
    public class Application {
    public static void main(String[] args) {
    try {
    // 配置连接地址
    Configuration conf = new Configuration();
    conf.set(“fs.defaultFS”, “hdfs://172.17.0.2:9000”);
    FileSystem fs = FileSystem.get(conf);
    // 打开文件并读取输出
    Path hello = new Path(“/hello/hello.txt”);
    FSDataInputStream ins = fs.open(hello);
    int ch = ins.read();
    while (ch != -1) {
    System.out.print((char)ch);
    ch = ins.read();
    }
    System.out.println();
    } *catch     (IOException ioe) {
    ioe.printStackTrace();
    }
    }
    }