电商项目实战-省份浏览量统计功能升级（十一）

1、修改LogParser.java

src/main/java/project/utils/LogParser.java

package project.utils;

import org.apache.commons.lang.StringUtils;
import java.util.HashMap;
import java.util.Map;

//日志解析
public class LogParser {

    public Map<String, String> parser(String log){
        Map<String, String> info = new HashMap<>();
        IPParser ipParser = IPParser.getInstance();

        //IP是第13个字段
        if (StringUtils.isNotBlank(log)){
            String[] splits = log.split("\001");

            String ip = splits[13];
            String country = "-";
            String province = "-";
            String city = "-";
            IPParser.RegionInfo regionInfo = ipParser.analyseIp(ip);

            if (regionInfo != null){
                country = regionInfo.getCountry();
                province = regionInfo.getProvince();
                city = regionInfo.getCity();
            }

            info.put("ip",ip);
            info.put("country",country);
            info.put("province",province);
            info.put("city",city);

            String url = splits[1];
            info.put("url",url);

            String time = splits[17];
            info.put("time",time);

        }
        return info;
    }

    public Map<String, String> parserv2(String log){

        Map<String, String> info = new HashMap<>();

        if (StringUtils.isNotBlank(log)){
            String[] splits = log.split("\t");

            String ip = splits[0];
            String country = splits[1];
            String province = splits[2];
            //String city = "-";

            info.put("ip",ip);
            info.put("country",country);
            info.put("province",province);
            //info.put("city",city);

            String time = splits[3];
            info.put("time",time);

            String pageId = splits[4];
            info.put("pageId",pageId);

//            String url = splits[5];
//            info.put("url",url);
        }
        return info;
    }

}

 

2、ProvinceStartV2App.java

src/main/java/project/mrv2/ProvinceStartV2App.java

package project.mrv2;

import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
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;
import project.utils.IPParser;
import project.utils.LogParser;

import java.io.IOException;
import java.util.Map;

//省份浏览量统计
public class ProvinceStartV2App {
    public static void main(String[] args) throws Exception {

        Configuration configuration = new Configuration();

        FileSystem fileSystem = FileSystem.get(configuration);
        Path outputPath = new Path("output/v2/provincestart");
        if (fileSystem.exists(outputPath)) {
            fileSystem.delete(outputPath, true);
        }

        Job job = Job.getInstance(configuration);
        job.setJarByClass(ProvinceStartV2App.class);

        job.setMapperClass(ProvinceStartV2App.MyMapper.class);
        job.setReducerClass(ProvinceStartV2App.MyReducer.class);

        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(LongWritable.class);

        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(LongWritable.class);

        FileInputFormat.setInputPaths(job, new Path("input/etl"));
        FileOutputFormat.setOutputPath(job, new Path("output/v2/provincestart"));

        job.waitForCompletion(true);

    }

    //Text：省份
    //LongWritable：量的统计
    static class MyMapper extends Mapper<LongWritable, Text, Text, LongWritable> {
        private LongWritable ONE = new LongWritable(1);
        private LogParser logParser;

        @Override
        protected void setup(Context context) throws IOException, InterruptedException {
            logParser = new LogParser();
        }

        @Override
        protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
            //value：是日志
            //拿到日志
            String log = value.toString();
            //将日志传进来
            Map<String, String> info = logParser.parserv2(log);
            context.write(new Text(info.get("province")), ONE);
        }
    }

    static class MyReducer extends Reducer<Text, LongWritable, Text, LongWritable>{
        @Override
        protected void reduce(Text key, Iterable<LongWritable> values, Context context) throws IOException, InterruptedException {
            long count = 0;
            for(LongWritable value: values){
                count++;
            }
            context.write(key, new LongWritable(count));
        }
    }
}

 

3、问题

（1）LogParser.java中添加url，则会报溢出错误。所以这里将url注释掉。