一、下载Hadoop jar包至非中文路径
-
下载链接:https://hadoop.apache.org/releases.html
-
解压至非中文路径
二、配置Hadoop环境变量
- 配置HADOOP_HOME环境变量
- 配置Path环境变量
三、创建一个Maven工程
-
创建一个名为
HdfsClientDemo
的Maven
工程 -
在
pom.xml
中导入相应的依赖
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>RELEASE</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-common</artifactId> <version>2.7.2</version> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-client</artifactId> <version>2.7.2</version> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-hdfs</artifactId> <version>2.7.2</version> </dependency> <dependency> <groupId>jdk.tools</groupId> <artifactId>jdk.tools</artifactId> <version>1.8</version> <scope>system</scope> <systemPath>${JAVA_HOME}/lib/tools.jar</systemPath> </dependency> </dependencies>
在项目的src/main/resources
目录下,新建一个文件,命名为log4j.properties
,在文件中填入
log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=target/spring.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d %p [%c] - %m%n
4 创建包名:com.atguigu.hdfs
5 创建HdfsClient
类
public class HdfsClient{ @Test public void testMkdirs() throws IOException, InterruptedException, URISyntaxException{ // 1 获取文件系统 Configuration configuration = new Configuration(); // 配置在集群上运行 // configuration.set("fs.defaultFS", "hdfs://hadoop102:9000"); // FileSystem fs = FileSystem.get(configuration); FileSystem fs = FileSystem.get(new URI("hdfs://hadoop102:9000"), configuration, "atguigu"); // 2 创建目录 fs.mkdirs(new Path("/1108/daxian/banzhang")); // 3 关闭资源 fs.close(); } }
6 执行程序