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Hadoop十九

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HDFS  API操作

  在Windows上操作hadoop,需要添加hadoop依赖,我的hadoop是3.3.1版本的,我用的依赖是3.2.0的,需要配置环境变量

 

 

 PATH添加如下路径:

 

然后双击依赖中的

 

 

 一闪而过就是成功的。

在maven项目中添加如下依赖

<dependencies>
    <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-client -->
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-client</artifactId>
        <version>3.2.0</version>
        <scope>provided</scope>
    </dependency>


    <!-- https://mvnrepository.com/artifact/junit/junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.30</version>
        <scope>test</scope>
    </dependency>

</dependencies>

一开始忘记了<dependencies>标签,导致一直报错。

然后在src/main/resources目录下,新建log4j.properties文件夹,在文件夹中填入.

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

 

标签:appender,hadoop,Hadoop,apache,org,logfile,十九,log4j
来源: https://www.cnblogs.com/zhaolei0419/p/16606990.html