mapreduce 将数据清洗后保存到 hbase
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);
}
}
原文地址：https://blog.csdn.net/qq_24330181/article/details/143647153
免责声明：本站文章内容转载自网络资源，如本站内容侵犯了原著者的合法权益，可联系本站删除。更多内容请关注自学内容网（zxcms.com）！