1. 新建Maven项目
初始Maven项目完成后，初始的配置（pom.xml）如下：
2. 配置Maven
向项目里新建Spark Core库
<?xml version="1.0" encoding="UTF-8"?>
<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>net.libaoquan</groupId>
<artifactId>TestSpark</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency> <!-- Spark dependency -->
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.2.1</version>
</dependency>
</dependencies>
</project>
3.新建Java类
新建Java类，写入Spark(Java API)代码：
import org.apache.spark.api.java.*;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.Function;
public class TestSparkJava {
public static void main(String[] args) {
String logFile = "D:\\\\ab.txt";
SparkConf conf = new SparkConf().setMaster("local").setAppName("TestSpark");
JavaSparkContext sc = new JavaSparkContext(conf);
JavaRDD<String> logData = sc.textFile(logFile).cache();
long numAs = logData.filter(new Function<String, Boolean>() {
public Boolean call(String s) { return s.contains("0"); }
}).count();
long numBs = logData.filter(new Function<String, Boolean>() {
public Boolean call(String s) { return s.contains("1"); }
}).count();
System.out.println("Lines with 0: " + numAs + ", lines with 1: " + numBs);
sc.stop();
}
}
运行项目，结果如下：
