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
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