Hadoop基础教程-第4章 HDFS的Java API(4.3 pom.xml解析)

2022-05-06 18:35:13 浏览数 (1)

第4章 HDFS的Java API

4.3 pom.xml解析

4.3.1 Maven库

https://mvnrepository.com/

4.3.2 添加Hadoop的依赖

在pom.xml文件里添加hadoop的依赖包hadoop-common, hadoop-client, hadoop-hdfs 在搜索框中输入hadoop-common,单击“Search”按钮

单击“Apache Hadoop Common”链接,选择2.7.3版,复制对应Maven代码,粘贴到pom.xml文件中。

类似地搜索hadoop-client和hadoop-hdfs的Maven依赖包代码,最后得到的pom.xml文件如下:

代码语言:javascript复制
<project xmlns="http://maven.apache.org/POM/4.0.0" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.hadron</groupId>
    <artifactId>hdfsDemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>hdfsDemo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-common -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-common</artifactId>
            <version>2.7.3</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-hdfs -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-hdfs</artifactId>
            <version>2.7.3</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-client -->
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>2.7.3</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>
</project>

保存pom.xml文件后,Eclipse会自动下载相关依赖包,如果出现错误,请强制更新Maven即可(参加4.2节)

在项目的pom.xml文件中添加如下内容:

代码语言:javascript复制
    <!-- 设定主仓库,按设定顺序进行查找。 -->
    <repositories>

        <repository>
            <id>maven-aliyun</id>
            <name>maven-aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </repository>

    </repositories>


    <!-- 设定插件仓库 -->
    <pluginRepositories>

        <pluginRepository>
            <id>maven-aliyun</id>
            <name>maven-aliyun</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </pluginRepository>

    </pluginRepositories>

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