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  • Maven安装(Linux)

    1.从官网上寻找自己需要的合适的版本,此处我用的是maven-3.6.1

    wget http://mirrors.tuna.tsinghua.edu.cn/apache/maven/maven-3/3.6.1/binaries/apache-maven-3.6.1-bin.tar.gz

    2.将其解压在/usr/local 目录下

    tar -zxvf apache-maven-3.6.1-bin.tar.gz -C /usr/local
    rm apache-maven-3.6.1-bin.tar.gz -C /usr/local

    3.进入/usr/local目录下,修改maven文件目录的名字

    cd /usr/local
    mv apache-maven-3.6.1 maven-3.6.1

    4.接下来进行maven的环境配置

    vim /etc/profile
    export MAVEN_HOME=/usr/local/maven-3.6.1
    export PATH=$JAVA_HOME/bin:$MAVEN_HOME/bin:$PATH

    5.刷新环境变量

    source /etc/profile

    6.测试maven是否成功安装

    mvn -version

    7.Java独立应用编程

    1)进入用户主文件夹

    cd ~

    2)创建sparkApp2

    mkdir sparkapp2

    3)创建一个SimpleApp.java文件在./sparkapp2/src/main/java中

    vim ./sparkapp2/src/main/java/SimpleApp.java
    内容如下:
     1 /*** SimpleApp.java ***/
     2 import org.apache.spark.api.java.*;
     3 import org.apache.spark.api.java.function.Function;
     4  
     5 public class SimpleApp {
     6 public static void main(String[] args) {
     7 String logFile = "file:///usr/local/spark-2.4.3/README.md";
     8 JavaSparkContext sc = new JavaSparkContext("local", "Simple App",
     9 "file:///usr/local/spark-2.4.3/", new String[]{"target/simple-project-1.0.jar"});
    10 JavaRDD<String> logData = sc.textFile(logFile).cache();
    11  
    12 long numAs = logData.filter(new Function<String, Boolean>() {
    13 public Boolean call(String s) {
    14 return s.contains("a");
    15 }
    16 }).count();
    17  
    18 long numBs = logData.filter(new Function<String, Boolean>() {
    19 public Boolean call(String s) { return s.contains("b"); }
    20 }).count();
    21  
    22 System.out.println("Lines with a: " + numAs + ", lines with b: " + numBs);
    23 }
    24 }
    该程序依赖Spark java API,因此需要通过Maven进行编译打包。

    4)在./sparkapp2中新建文件pom.xml

    此处的依赖如果不知道是哪个具体的版本,可以直接在maven的官网上查看依赖,官网链接https://mvnrepository.com/
    内容如下:
    <project>
    <groupId>edu.berkeley</groupId>
    <artifactId>simple-project</artifactId>
    <modelVersion>4.0.0</modelVersion>
    <name>Simple Project</name>
    <packaging>jar</packaging>
    <version>1.0</version>
    <repositories>
    <repository>
    <id>Akka repository</id>
    <url>http://repo.akka.io/releases</url>
    </repository>
    </repositories>
    <dependencies>
    <dependency> <!-- Spark dependency -->
    <groupId>org.apache.spark</groupId>
    <artifactId>spark-core_2.11</artifactId>
    <version>2.4.3</version>
    </dependency>
    </dependencies>
    </project>

    5)使用maven程序打包java程序

    cd ~/sparkapp2
    find .

    6)接着将整个应用程序打包成jar(耗时长,十几二十分钟这样子吧,会比sbt时间要长),成功后的提示信息如下所示:

    /usr/local/maven-3.6.1/bin.mvn package

    7)通过spark-submit运行程序

    将生成的jar包通过spark-submit提交到Spark中
    /usr/local/spark-2.4.3/bin/spark-submit --class "SimpleApp" ~/sparkapp2/target/simple-project-1.0.jar 2>&1 | grep "Lines with a"
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  • 原文地址:https://www.cnblogs.com/xiaolan-Lin/p/11353872.html
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