maven、eclipse配置hadoop开发环境

1、安装maven

1.1 下载maven

1.2 解压到本地的目录下

1.3 将meven的安装目录加入到/etc/profile文件中

export M2_HOME=/soft/maven/apache-maven-3.6.0
export CLASSPATH=$M2_HOME/lib:$CLASSPATH
export PATH=$PATH:$M2_HOME/bin:$PATH

1.4 运行命令maven -verson 验证是否安装成功

2、设置maven的settings.xml文件

2.1 修改本地仓库的位置

<localRepository>/soft/maven/apache-maven-3.6.0/localrepository</localRepository>

2.2 修改镜像源

    <mirror>
      <id>alimaven</id>
      <name>aliyun maven</name>
  　　<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
      <mirrorOf>central</mirrorOf>        
    </mirror>
  </mirrors>

3、配置eclipse的环境

注意一下只配置global setting

user seeting 默认就行，否则出现许多问题

4、新建一个maven项目，一切都默认

然后再pom.xml文件加入以下代码

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!-- 定義一個變量 -->
    <hadoop.version>3.1.1</hadoop.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
    <!-- JDK依賴 -->
    <dependency>
    	<groupId>jdk.tools</groupId>
    	<artifactId>jdk.tools</artifactId>
    	<version>1.8</version>
    	<scope>system</scope>
    	<systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
    </dependency>
    
    <!-- hadoop start -->
    
	  <dependency>
	      <groupId>org.apache.hadoop</groupId>
	      <artifactId>hadoop-hdfs</artifactId>
	      <version>${hadoop.version}</version>
	  </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>
	  
	 <!-- hadoop end -->