IDEA开发java版本spark程序

如何去创建项目这里就不对讲了，可以参考 ：https://www.cnblogs.com/braveym/p/12214367.html

 

先在pom.xml文件里面添加spark依赖包

 

 

<dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-core_2.11</artifactId>
      <version>2.3.0</version>
    </dependency>

 

 

 

新建一个java类

 

 

 

 

 

 

 

 

 

编写代码

package com.dtiantai;

import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaPairRDD;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.api.java.function.FlatMapFunction;
import org.apache.spark.api.java.function.Function2;
import org.apache.spark.api.java.function.PairFunction;
import scala.Tuple2;

import java.util.Arrays;
import java.util.Iterator;

public class MyJavaWordCount {
    public static void main(String[] args) {
        //参数检测
        if(args.length>2){
            System.err.println("Usage: MyJavaWordCount <input> <output>");
            System.exit(1);
        }

        //创建sparkconf
         SparkConf conf = new SparkConf().setAppName("MyJavaWordCount");
         conf.setMaster("local[2]");

         JavaSparkContext sc=new JavaSparkContext(conf);

         //读取数据
        JavaRDD<String> inputRDD = sc.textFile(args[0]);

        //进行相关计算
        JavaRDD<String> words=inputRDD.flatMap(new FlatMapFunction<String, String>() {

            @Override
            public Iterator<String> call(String s) throws Exception {
                return Arrays.asList(s.split("\\s+")).iterator();
            }
        });

        JavaPairRDD<String,Integer> result= words.mapToPair(new PairFunction<String, String, Integer>() {
            @Override
            public Tuple2<String, Integer> call(String s) throws Exception {
                return new Tuple2<>(s, 1);
            }
        }).reduceByKey(new Function2<Integer, Integer, Integer>() {
             @Override
             public Integer call(Integer x, Integer y) throws Exception {
                 return x+y;
             }
         });

        //保存结果
        result.saveAsTextFile(args[1]);

        //关闭sc
        sc.stop();
    }
}

 

 

 

 

 

 

配置输入输出目录

 

 

 

运行程序

D:\SoftWare\JDK8\bin\java.exe "-javaagent:D:\SoftWare\IDEA\IntelliJ IDEA 2019.1.3\lib\idea_rt.jar=52468:D:\SoftWare\IDEA\IntelliJ IDEA 2019.1.3\bin" -Dfile.encoding=UTF-8 -classpath 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com.dtiantai.MyJavaWordCount D:\MyCode\testJavaAndScala\data\wc.txt D:\MyCode\testJavaAndScala\data\out
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
20/01/19 18:14:04 INFO SparkContext: Running Spark version 2.3.0
20/01/19 18:14:04 INFO SparkContext: Submitted application: MyJavaWordCount
20/01/19 18:14:04 INFO SecurityManager: Changing view acls to: admin
20/01/19 18:14:04 INFO SecurityManager: Changing modify acls to: admin
20/01/19 18:14:04 INFO SecurityManager: Changing view acls groups to: 
20/01/19 18:14:04 INFO SecurityManager: Changing modify acls groups to: 
20/01/19 18:14:04 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(admin); groups with view permissions: Set(); users  with modify permissions: Set(admin); groups with modify permissions: Set()
20/01/19 18:14:05 INFO Utils: Successfully started service 'sparkDriver' on port 52491.
20/01/19 18:14:05 INFO SparkEnv: Registering MapOutputTracker
20/01/19 18:14:05 INFO SparkEnv: Registering BlockManagerMaster
20/01/19 18:14:05 INFO BlockManagerMasterEndpoint: Using org.apache.spark.storage.DefaultTopologyMapper for getting topology information
20/01/19 18:14:05 INFO BlockManagerMasterEndpoint: BlockManagerMasterEndpoint up
20/01/19 18:14:05 INFO DiskBlockManager: Created local directory at C:\Users\admin\AppData\Local\Temp\blockmgr-f405ac37-c1ff-4a8a-a490-1144a192f758
20/01/19 18:14:05 INFO MemoryStore: MemoryStore started with capacity 902.7 MB
20/01/19 18:14:05 INFO SparkEnv: Registering OutputCommitCoordinator
20/01/19 18:14:05 INFO Utils: Successfully started service 'SparkUI' on port 4040.
20/01/19 18:14:05 INFO SparkUI: Bound SparkUI to 0.0.0.0, and started at http://GX-GYM-D8178:4040
20/01/19 18:14:05 INFO Executor: Starting executor ID driver on host localhost
20/01/19 18:14:05 INFO Utils: Successfully started service 'org.apache.spark.network.netty.NettyBlockTransferService' on port 52504.
20/01/19 18:14:05 INFO NettyBlockTransferService: Server created on GX-GYM-D8178:52504
20/01/19 18:14:05 INFO BlockManager: Using org.apache.spark.storage.RandomBlockReplicationPolicy for block replication policy
20/01/19 18:14:05 INFO BlockManagerMaster: Registering BlockManager BlockManagerId(driver, GX-GYM-D8178, 52504, None)
20/01/19 18:14:05 INFO BlockManagerMasterEndpoint: Registering block manager GX-GYM-D8178:52504 with 902.7 MB RAM, BlockManagerId(driver, GX-GYM-D8178, 52504, None)
20/01/19 18:14:05 INFO BlockManagerMaster: Registered BlockManager BlockManagerId(driver, GX-GYM-D8178, 52504, None)
20/01/19 18:14:05 INFO BlockManager: Initialized BlockManager: BlockManagerId(driver, GX-GYM-D8178, 52504, None)
20/01/19 18:14:06 INFO MemoryStore: Block broadcast_0 stored as values in memory (estimated size 214.5 KB, free 902.5 MB)
20/01/19 18:14:07 INFO MemoryStore: Block broadcast_0_piece0 stored as bytes in memory (estimated size 20.4 KB, free 902.5 MB)
20/01/19 18:14:07 INFO BlockManagerInfo: Added broadcast_0_piece0 in memory on GX-GYM-D8178:52504 (size: 20.4 KB, free: 902.7 MB)
20/01/19 18:14:07 INFO SparkContext: Created broadcast 0 from textFile at MyJavaWordCount.java:30
20/01/19 18:14:07 INFO FileInputFormat: Total input paths to process : 1
20/01/19 18:14:07 INFO deprecation: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir
20/01/19 18:14:07 INFO SparkContext: Starting job: runJob at SparkHadoopWriter.scala:78
20/01/19 18:14:07 INFO DAGScheduler: Registering RDD 3 (mapToPair at MyJavaWordCount.java:41)
20/01/19 18:14:07 INFO DAGScheduler: Got job 0 (runJob at SparkHadoopWriter.scala:78) with 2 output partitions
20/01/19 18:14:07 INFO DAGScheduler: Final stage: ResultStage 1 (runJob at SparkHadoopWriter.scala:78)
20/01/19 18:14:07 INFO DAGScheduler: Parents of final stage: List(ShuffleMapStage 0)
20/01/19 18:14:07 INFO DAGScheduler: Missing parents: List(ShuffleMapStage 0)
20/01/19 18:14:07 INFO DAGScheduler: Submitting ShuffleMapStage 0 (MapPartitionsRDD[3] at mapToPair at MyJavaWordCount.java:41), which has no missing parents
20/01/19 18:14:07 INFO MemoryStore: Block broadcast_1 stored as values in memory (estimated size 5.1 KB, free 902.5 MB)
20/01/19 18:14:07 INFO MemoryStore: Block broadcast_1_piece0 stored as bytes in memory (estimated size 2.9 KB, free 902.5 MB)
20/01/19 18:14:07 INFO BlockManagerInfo: Added broadcast_1_piece0 in memory on GX-GYM-D8178:52504 (size: 2.9 KB, free: 902.7 MB)
20/01/19 18:14:07 INFO SparkContext: Created broadcast 1 from broadcast at DAGScheduler.scala:1039
20/01/19 18:14:07 INFO DAGScheduler: Submitting 2 missing tasks from ShuffleMapStage 0 (MapPartitionsRDD[3] at mapToPair at MyJavaWordCount.java:41) (first 15 tasks are for partitions Vector(0, 1))
20/01/19 18:14:07 INFO TaskSchedulerImpl: Adding task set 0.0 with 2 tasks
20/01/19 18:14:07 INFO TaskSetManager: Starting task 0.0 in stage 0.0 (TID 0, localhost, executor driver, partition 0, PROCESS_LOCAL, 7880 bytes)
20/01/19 18:14:07 INFO TaskSetManager: Starting task 1.0 in stage 0.0 (TID 1, localhost, executor driver, partition 1, PROCESS_LOCAL, 7880 bytes)
20/01/19 18:14:07 INFO Executor: Running task 1.0 in stage 0.0 (TID 1)
20/01/19 18:14:07 INFO Executor: Running task 0.0 in stage 0.0 (TID 0)
20/01/19 18:14:07 INFO HadoopRDD: Input split: file:/D:/MyCode/testJavaAndScala/data/wc.txt:0+32
20/01/19 18:14:07 INFO HadoopRDD: Input split: file:/D:/MyCode/testJavaAndScala/data/wc.txt:32+33
20/01/19 18:14:07 INFO Executor: Finished task 1.0 in stage 0.0 (TID 1). 1154 bytes result sent to driver
20/01/19 18:14:07 INFO Executor: Finished task 0.0 in stage 0.0 (TID 0). 1111 bytes result sent to driver
20/01/19 18:14:07 INFO TaskSetManager: Finished task 0.0 in stage 0.0 (TID 0) in 194 ms on localhost (executor driver) (1/2)
20/01/19 18:14:07 INFO TaskSetManager: Finished task 1.0 in stage 0.0 (TID 1) in 182 ms on localhost (executor driver) (2/2)
20/01/19 18:14:07 INFO TaskSchedulerImpl: Removed TaskSet 0.0, whose tasks have all completed, from pool 
20/01/19 18:14:07 INFO DAGScheduler: ShuffleMapStage 0 (mapToPair at MyJavaWordCount.java:41) finished in 0.310 s
20/01/19 18:14:07 INFO DAGScheduler: looking for newly runnable stages
20/01/19 18:14:07 INFO DAGScheduler: running: Set()
20/01/19 18:14:07 INFO DAGScheduler: waiting: Set(ResultStage 1)
20/01/19 18:14:07 INFO DAGScheduler: failed: Set()
20/01/19 18:14:07 INFO DAGScheduler: Submitting ResultStage 1 (MapPartitionsRDD[5] at saveAsTextFile at MyJavaWordCount.java:54), which has no missing parents
20/01/19 18:14:07 INFO MemoryStore: Block broadcast_2 stored as values in memory (estimated size 65.5 KB, free 902.4 MB)
20/01/19 18:14:07 INFO MemoryStore: Block broadcast_2_piece0 stored as bytes in memory (estimated size 23.4 KB, free 902.4 MB)
20/01/19 18:14:07 INFO BlockManagerInfo: Added broadcast_2_piece0 in memory on GX-GYM-D8178:52504 (size: 23.4 KB, free: 902.7 MB)
20/01/19 18:14:07 INFO SparkContext: Created broadcast 2 from broadcast at DAGScheduler.scala:1039
20/01/19 18:14:07 INFO DAGScheduler: Submitting 2 missing tasks from ResultStage 1 (MapPartitionsRDD[5] at saveAsTextFile at MyJavaWordCount.java:54) (first 15 tasks are for partitions Vector(0, 1))
20/01/19 18:14:07 INFO TaskSchedulerImpl: Adding task set 1.0 with 2 tasks
20/01/19 18:14:07 INFO TaskSetManager: Starting task 0.0 in stage 1.0 (TID 2, localhost, executor driver, partition 0, ANY, 7649 bytes)
20/01/19 18:14:07 INFO TaskSetManager: Starting task 1.0 in stage 1.0 (TID 3, localhost, executor driver, partition 1, ANY, 7649 bytes)
20/01/19 18:14:07 INFO Executor: Running task 0.0 in stage 1.0 (TID 2)
20/01/19 18:14:07 INFO Executor: Running task 1.0 in stage 1.0 (TID 3)
20/01/19 18:14:07 INFO ShuffleBlockFetcherIterator: Getting 1 non-empty blocks out of 2 blocks
20/01/19 18:14:07 INFO ShuffleBlockFetcherIterator: Getting 2 non-empty blocks out of 2 blocks
20/01/19 18:14:07 INFO ShuffleBlockFetcherIterator: Started 0 remote fetches in 8 ms
20/01/19 18:14:07 INFO ShuffleBlockFetcherIterator: Started 0 remote fetches in 4 ms
20/01/19 18:14:08 INFO FileOutputCommitter: Saved output of task 'attempt_20200119181407_0005_m_000000_0' to file:/D:/MyCode/testJavaAndScala/data/out/_temporary/0/task_20200119181407_0005_m_000000
20/01/19 18:14:08 INFO SparkHadoopMapRedUtil: attempt_20200119181407_0005_m_000000_0: Committed
20/01/19 18:14:08 INFO FileOutputCommitter: Saved output of task 'attempt_20200119181407_0005_m_000001_0' to file:/D:/MyCode/testJavaAndScala/data/out/_temporary/0/task_20200119181407_0005_m_000001
20/01/19 18:14:08 INFO SparkHadoopMapRedUtil: attempt_20200119181407_0005_m_000001_0: Committed
20/01/19 18:14:08 INFO Executor: Finished task 0.0 in stage 1.0 (TID 2). 1502 bytes result sent to driver
20/01/19 18:14:08 INFO Executor: Finished task 1.0 in stage 1.0 (TID 3). 1502 bytes result sent to driver
20/01/19 18:14:08 INFO TaskSetManager: Finished task 1.0 in stage 1.0 (TID 3) in 172 ms on localhost (executor driver) (1/2)
20/01/19 18:14:08 INFO TaskSetManager: Finished task 0.0 in stage 1.0 (TID 2) in 174 ms on localhost (executor driver) (2/2)
20/01/19 18:14:08 INFO TaskSchedulerImpl: Removed TaskSet 1.0, whose tasks have all completed, from pool 
20/01/19 18:14:08 INFO DAGScheduler: ResultStage 1 (runJob at SparkHadoopWriter.scala:78) finished in 0.205 s
20/01/19 18:14:08 INFO DAGScheduler: Job 0 finished: runJob at SparkHadoopWriter.scala:78, took 0.652025 s
20/01/19 18:14:08 INFO SparkHadoopWriter: Job job_20200119181407_0005 committed.
20/01/19 18:14:08 INFO SparkUI: Stopped Spark web UI at http://GX-GYM-D8178:4040
20/01/19 18:14:08 INFO MapOutputTrackerMasterEndpoint: MapOutputTrackerMasterEndpoint stopped!
20/01/19 18:14:08 INFO MemoryStore: MemoryStore cleared
20/01/19 18:14:08 INFO BlockManager: BlockManager stopped
20/01/19 18:14:08 INFO BlockManagerMaster: BlockManagerMaster stopped
20/01/19 18:14:08 INFO OutputCommitCoordinator$OutputCommitCoordinatorEndpoint: OutputCommitCoordinator stopped!
20/01/19 18:14:08 INFO SparkContext: Successfully stopped SparkContext
20/01/19 18:14:08 INFO ShutdownHookManager: Shutdown hook called
20/01/19 18:14:08 INFO ShutdownHookManager: Deleting directory C:\Users\admin\AppData\Local\Temp\spark-09da7888-77f6-41df-b053-d9cc5d3f1b2b

Process finished with exit code 0

 

 

 

查看输出结果

来源：https://www.cnblogs.com/braveym/p/12215142.html