連線hdfs

根據hdfs的版本引用相關的hdfs依賴

        <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-client -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>2.6.5</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-common -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-common</artifactId>
            <version>2.6.5</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-hdfs -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-hdfs</artifactId>
            <version>2.6.5</version>
        </dependency>
 

將hdfs中的core-site.xml和hdfs-site.xml放進專案的resources目錄裡

簡單編碼測試下

public class Connection {
    public static void main(String[] args) throws IOException, URISyntaxException, InterruptedException {
        Configuration configuration=new Configuration();
        System.setProperty("HADOOP_USER_NAME", "root");
        FileSystem fs = FileSystem.get(configuration);
        System.out.println(fs.getHomeDirectory());
        //拿到FileSystem後可以簡單操作下hdfs，若是執行成功則代表連線成功！
    }


}