mapreduce数据清洗-第一阶段

Result文件数据说明:

Ip106.39.41.166,(城市)

Date10/Nov/2016:00:01:02 +0800,(日期)

Day10,(天数)

Traffic: 54 ,(流量)

Type: video,(类型:视频video或文章article

Id: 8701(视频或者文章的id

测试要求:

1、 数据清洗:按照进行数据清洗,并将清洗后的数据导入hive数据库中

两阶段数据清洗:

1)第一阶段:把需要的信息从原始日志中提取出来

ip:    199.30.25.88

time:  10/Nov/2016:00:01:03 +0800

traffic:  62

文章: article/11325

视频: video/3235

2)第二阶段:根据提取出来的信息做精细化操作

ip--->城市 cityIP

date--> time:2016-11-10 00:01:03

day: 10

traffic:62

type:article/video

id:11325

3hive数据库表结构:

create table data(  ip string,  time string , day string, traffic bigint,

type string, id   string ) 

package test;
import java.lang.String;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
public class sjqx {
	static Dao dao=new Dao();
	 public static final SimpleDateFormat FORMAT = new SimpleDateFormat("d/MMM/yyyy:HH:mm:ss", Locale.ENGLISH); //原时间格式
     public static final SimpleDateFormat dateformat1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//现时间格式
   private static Date parseDateFormat(String string) {         //转换时间格式
        Date parse = null;
        try {
            parse = FORMAT.parse(string);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return parse;
    }
	public static class MyMapper extends Mapper<LongWritable, Text, Text/*map对应键类型*/, Text/*map对应值类型*/>
    {
         protected void map(LongWritable key, Text value,Context context)throws IOException, InterruptedException
         {
              String[] strNlist = value.toString().split(",");//如何分隔
              //LongWritable,IntWritable,Text等
              Date date = parseDateFormat(strNlist[1]);
              context.write(new Text(strNlist[0])/*map对应键类型*/,new Text(dateformat1.format(date)+","+strNlist[2]+","+strNlist[3]+","+strNlist[4]+","+strNlist[5])/*map对应值类型*/);
         }
    }
    public static class MyReducer extends Reducer<Text/*map对应键类型*/, Text/*map对应值类型*/, Text/*reduce对应键类型*/, Text/*reduce对应值类型*/>
    {
//    	static No1Info info=new No1Info();
         protected void reduce(Text key, Iterable<Text/*map对应值类型*/> values,Context context)throws IOException, InterruptedException
         {
        	 for (/*map对应值类型*/Text init : values)
             {
//        		 String[] strNlist = init.toString().split(",");
//                 dao.add("data", strNlist);
            	 context.write( key/*reduce对应键类型*/, new Text(init)/*reduce对应值类型*/);
             }
         }
    }
	
	public static void main(String[] args) throws Exception {
		Configuration conf = new Configuration();
		
		//将命令行中的参数自动设置到变量conf中
//		String[] otherArgs = new GenericOptionsParser(conf,args).getRemainingArgs();
//		if (otherArgs.length != 2) {
//			System.err.println("Usage: wordcount <in> <out>");
//			System.exit(2);
//		}
		
		Job job = Job.getInstance();
		//job.setJar("MapReduceDriver.jar");
		job.setJarByClass(sjqx.class);
		// TODO: specify a mapper
		job.setMapperClass(MyMapper.class);
		job.setMapOutputKeyClass(/*map对应键类型*/Text.class);
        job.setMapOutputValueClass( /*map对应值类型*/Text.class);
		
		// TODO: specify a reducer
		job.setReducerClass(MyReducer.class);
		job.setOutputKeyClass(/*reduce对应键类型*/Text.class);
		job.setOutputValueClass(/*reduce对应值类型*/Text.class);

		// TODO: specify input and output DIRECTORIES (not files)
		FileInputFormat.setInputPaths(job, new Path("hdfs://localhost:9000/test/in/result"));
		FileOutputFormat.setOutputPath(job, new Path("hdfs://localhost:9000/test/out"));

		boolean flag = job.waitForCompletion(true);
		System.out.println("SUCCEED!"+flag);	//任务完成提示
		System.exit(flag ? 0 : 1);
		System.out.println();
	}
}

  (清洗之前)(清洗之后)

在hive中创建表data

运行

 load data inpath 'hdfs://localhost:9000/test/out/part-r-00000' overwrite into table data; 
运行结果:
原文地址:https://www.cnblogs.com/jccjcc/p/11852033.html