Java操作Hadoop-HDFS API Maven环境搭建

1、创建一个Java项目，将一下代码粘贴到pom.xml中　

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <hadoop.version>2.6.0</hadoop.version>
</properties>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-client</artifactId>
        <version>${hadoop.version}</version>
    </dependency>
   <-- <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>${hadoop.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-hdfs</artifactId>
        <version>${hadoop.version}</version>
    </dependency>
-->
</dependencies>
2、测试代码：

Configuration configuration = null;
FileSystem fileSystem = null;
String url = "hdfs://CentOS7:8020";
String user = "hadoop";
@Before
public void before() throws URISyntaxException, IOException, InterruptedException {
    configuration = new Configuration();
    configuration.set("dfs.replication","1");//设置副本数量为1
    fileSystem = FileSystem.get(new URI(url),configuration,user);
    System.out.println("before doing");
}
@After
public  void after(){
    System.out.println("after doing");
    configuration = null;
    try {
        fileSystem.close();
    } catch (IOException e) {
        fileSystem = null;
        e.printStackTrace();
    }
}
/**
 * 创建文件
 * @throws IOException
 */
@Test
public void mkdir() throws IOException {
    Path path = new Path("/mkdirTest1/123");
    boolean re = fileSystem.mkdirs(path);
    System.out.println(re);
}
3、运行，测试成功！