mapreduce 将数据清洗后保存到 hbase

数据格式

{"年份":"1990","国家补贴（亿元）":"5.4","地方补贴（亿元）":"3.2","企业补贴（亿元）":"0.8","其他补贴（亿元）":"0.5"}
{"年份":"1991","国家补贴（亿元）":"5.8","地方补贴（亿元）":"3.4","企业补贴（亿元）":"0.9","其他补贴（亿元）":"0.6"}
{"年份":"1992","国家补贴（亿元）":"6.2","地方补贴（亿元）":"3.7","企业补贴（亿元）":"1","其他补贴（亿元）":"0.7"}
{"年份":"1993","国家补贴（亿元）":"7","地方补贴（亿元）":"4.1","企业补贴（亿元）":"1.2","其他补贴（亿元）":"0.8"}
{"年份":"1994","国家补贴（亿元）":"7.8","地方补贴（亿元）":"4.5","企业补贴（亿元）":"1.4","其他补贴（亿元）":"0.9"}
{"年份":"1995","国家补贴（亿元）":"8.5","地方补贴（亿元）":"4.9","企业补贴（亿元）":"1.6","其他补贴（亿元）":"1"}
{"年份":"1996","国家补贴（亿元）":"9.2","地方补贴（亿元）":"5.3","企业补贴（亿元）":"1.8","其他补贴（亿元）":"1.1"}
{"年份":"1997","国家补贴（亿元）":"10","地方补贴（亿元）":"5.7","企业补贴（亿元）":"2","其他补贴（亿元）":"1.2"}
{"年份":"1998","国家补贴（亿元）":"10.8","地方补贴（亿元）":"6.1","企业补贴（亿元）":"2.2","其他补贴（亿元）":"1.3"}
{"年份":"1999","国家补贴（亿元）":"11.6","地方补贴（亿元）":"6.6","企业补贴（亿元）":"2.5","其他补贴（亿元）":"1.4"}
{"年份":"2000","国家补贴（亿元）":"12.5","地方补贴（亿元）":"7.2","企业补贴（亿元）":"2.8","其他补贴（亿元）":"1.6"}
{"年份":"2001","国家补贴（亿元）":"13.5","地方补贴（亿元）":"7.9","企业补贴（亿元）":"3.2","其他补贴（亿元）":"1.8"}
{"年份":"2002","国家补贴（亿元）":"14.5","地方补贴（亿元）":"8.7","企业补贴（亿元）":"3.7","其他补贴（亿元）":"2"}
{"年份":"2003","国家补贴（亿元）":"15.6","地方补贴（亿元）":"9.6","企业补贴（亿元）":"4.3","其他补贴（亿元）":"2.2"}
{"年份":"2004","国家补贴（亿元）":"16.8","地方补贴（亿元）":"10.6","企业补贴（亿元）":"5","其他补贴（亿元）":"2.5"}
{"年份":"2005","国家补贴（亿元）":"18.2","地方补贴（亿元）":"11.7","企业补贴（亿元）":"5.8","其他补贴（亿元）":"2.8"}
{"年份":"2006","国家补贴（亿元）":"19.8","地方补贴（亿元）":"12.9","企业补贴（亿元）":"6.7","其他补贴（亿元）":"3.2"}
{"年份":"2007","国家补贴（亿元）":"21.5","地方补贴（亿元）":"14.3","企业补贴（亿元）":"7.7","其他补贴（亿元）":"3.7"}
{"年份":"2008","国家补贴（亿元）":"23.3","地方补贴（亿元）":"15.9","企业补贴（亿元）":"8.8","其他补贴（亿元）":"4.3"}
{"年份":"2009","国家补贴（亿元）":"25.2","地方补贴（亿元）":"17.6","企业补贴（亿元）":"10.1","其他补贴（亿元）":"5"}
{"年份":"2010","国家补贴（亿元）":"27.2","地方补贴（亿元）":"19.4","企业补贴（亿元）":"11.6","其他补贴（亿元）":"5.8"}
{"年份":"2011","国家补贴（亿元）":"29.2","地方补贴（亿元）":"21.3","企业补贴（亿元）":"13.3","其他补贴（亿元）":"6.7"}
{"年份":"2012","国家补贴（亿元）":"31.3","地方补贴（亿元）":"23.4","企业补贴（亿元）":"15.2","其他补贴（亿元）":"7.7"}
{"年份":"2013","国家补贴（亿元）":"33.5","地方补贴（亿元）":"25.6","企业补贴（亿元）":"17.3","其他补贴（亿元）":"8.8"}
{"年份":"2014","国家补贴（亿元）":"35.8","地方补贴（亿元）":"27.9","企业补贴（亿元）":"19.6","其他补贴（亿元）":"10"}
{"年份":"2015","国家补贴（亿元）":"38.2","地方补贴（亿元）":"30.3","企业补贴（亿元）":"22.1","其他补贴（亿元）":"11.4"}
{"年份":"2016","国家补贴（亿元）":"40.7","地方补贴（亿元）":"32.8","企业补贴（亿元）":"24.9","其他补贴（亿元）":"13.1"}
{"年份":"2017","国家补贴（亿元）":"43.3","地方补贴（亿元）":"35.5","企业补贴（亿元）":"27.9","其他补贴（亿元）":"15.2"}
{"年份":"2018","国家补贴（亿元）":"46.2","地方补贴（亿元）":"38.3","企业补贴（亿元）":"31.2","其他补贴（亿元）":"17.6"}
{"年份":"2019","国家补贴（亿元）":"49.3","地方补贴（亿元）":"41.3","企业补贴（亿元）":"34.8","其他补贴（亿元）":"20.3"}
{"年份":"2020","国家补贴（亿元）":"52.5","地方补贴（亿元）":"44.6","企业补贴（亿元）":"38.7","其他补贴（亿元）":"23.5"}
{"年份":"2021","国家补贴（亿元）":"55.9","地方补贴（亿元）":"48.2","企业补贴（亿元）":"42.8","其他补贴（亿元）":"27.1"}
{"年份":"2022","国家补贴（亿元）":"59.4","地方补贴（亿元）":"52.1","企业补贴（亿元）":"47.3","其他补贴（亿元）":"31.4"}
{"年份":"2023","国家补贴（亿元）":"63.1","地方补贴（亿元）":"56.5","企业补贴（亿元）":"52.4","其他补贴（亿元）":"36.2"}

javabean

package cn.lhz.bean;

import cn.lhz.util.annotation.RowKeyAnnotation;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

/**
 * 教育历年补贴
 *
 * @author 李昊哲
 * @version 1.0.0
 */
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
public class SubsidyYear {
  /**
   * 年份
   */
  @RowKeyAnnotation
  private Integer year;

  /**
   * 国家
   */
  private double country;

  /**
   * 地方
   */
  private double local;

  /**
   * 企业
   */
  private double enterprise;

  /**
   * 其它
   */
  private double other;

  @Override
  public String toString() {
    return this.year + "\t" + this.country + "," + this.local + "," + this.enterprise + "," + this.other;
  }
}

mapreduce

package cn.lhz.etl;

import cn.lhz.bean.SubsidyYear;
import cn.lhz.util.hbase.HbaseUtil;
import cn.lhz.util.string.StringUtil;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.Table;
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;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;

/**
 * 教育历年补贴
 *
 * @author 李昊哲
 * @version 1.0.0
 */
public class SubsidyYear2Hbase {
  public static class SubsidyYearMapper extends Mapper<LongWritable, Text, Text, Text> {
    @Override
    protected void map(LongWritable key, Text value, Mapper<LongWritable, Text, Text, Text>.Context context) throws IOException, InterruptedException {
      // 将读取到的每行内容转为 java 字符串
      String json = value.toString();
      // 将读取到的 json 格式字符串 转为 csv 格式字符串
      String csv = StringUtil.extractValuesToString(json);
      // 截取 csv 格式字符串中第一个单元格的字符串作为输出的 key
      Text outKey = new Text(csv.substring(0, csv.indexOf(",")));
      // 截取 csv 格式字符串中除了第一个单元所有的字符串作为输出的 value
      Text outValue = new Text(csv.substring(csv.indexOf(",") + 1));
      // map输出
      context.write(outKey, outValue);
    }
  }

  public static class SubsidyYearReducer extends Reducer<Text, Text, Text, Text> {
    private Connection connection;
    public Table table;

    @Override
    protected void setup(Reducer<Text, Text, Text, Text>.Context context) throws IOException, InterruptedException {
      // 与 hbase 建立连接
      connection = HbaseUtil.getConnection();
      // 数据表名称
      String tableName = "SUBSIDY_YEAR";
      // 获取数据表
      table = HbaseUtil.getTable(connection, tableName);
      if (table == null) {
        // 如果数据表不存在 创建数据表
        HbaseUtil.createTable(connection.getAdmin(), tableName);
        // 重写获取数据表
        table = HbaseUtil.getTable(connection, tableName);
      }
    }

    @Override
    protected void reduce(Text key, Iterable<Text> values, Reducer<Text, Text, Text, Text>.Context context) throws IOException, InterruptedException {
      String csv = "";
      for (Text value : values) {
        csv = value.toString();
      }
      try {
        SubsidyYear subsidyYear = StringUtil.csv2Bean(csv, false, SubsidyYear.class);
        subsidyYear.setYear(Integer.parseInt(key.toString()));
        HbaseUtil.upsert(table, "OVER_THE_YEARS", subsidyYear);
      } catch (IllegalAccessException | NoSuchMethodException | InvocationTargetException | InstantiationException e) {
        throw new RuntimeException(e);
      }
    }

    @Override
    protected void cleanup(Reducer<Text, Text, Text, Text>.Context context) throws IOException, InterruptedException {
      if (table != null) {
        // 释放与 table 资源
        table.close();
      }
      if (connection != null) {
        // 释放与 hbase 之间的连接
        connection.close();
      }
    }
  }

  public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
    // 设置环境变量 hadoop 用户名 为 root
    System.setProperty("HADOOP_USER_NAME", "root");

    // 参数配置对象
    Configuration conf = new Configuration();

    // 跨平台提交
    conf.set("mapreduce.app-submission.cross-platform", "true");

    // 本地运行
    // conf.set("mapreduce.framework.name", "local");
    // 设置集群本地文件系统路径
    // conf.set("mapreduce.cluster.local.dir", "file:///home/lhz/hadoop");
    // 设置默认文件系统为 本地文件系统
    // conf.set("fs.defaultFS", "file:///");

    // 声明Job对象 就是一个应用
    // 为当前 job 设置名称 默认名称为打包后在的jar文件名称
    Job job = Job.getInstance(conf, "教育历年补贴");
    // 指定当前Job的驱动类
    job.setJarByClass(SubsidyYear2Hbase.class);
    // 指定当前Job的 Mapper
    job.setMapperClass(SubsidyYearMapper.class);
    // 设置 reduce 输出 value 的数据类型
    job.setReducerClass(SubsidyYearReducer.class);
    // 指定当前Job的 Reducer
    job.setOutputKeyClass(Text.class);
    // 设置 reduce 输出 key 的数据类型
    job.setOutputValueClass(Text.class);
    // 定义 map 输入的路径 注意：该路径默认为hdfs路径
    FileInputFormat.addInputPath(job, new Path("/edu-ods/教育补贴.log"));
    // 定义 reduce 输出数据持久化的路径 注意：该路径默认为hdfs路径
    Path path = new Path("/edu-dwd");
    // 根据配置项获取 HDFS 文件系统
    FileSystem fs = path.getFileSystem(conf);
    if (fs.exists(path)) {
      // 如果 数据输出目录存在 则将数据输出目录删除
      fs.delete(path, true);
    }
    FileOutputFormat.setOutputPath(job, path);
    // 提交 job
    System.exit(job.waitForCompletion(true) ? 0 : 1);
  }
}