023_数量类型练习——Hadoop MapReduce手机流量统计

1）分析业务需求：用户使用手机上网，存在流量的消耗。流量包括两部分：其一是上行流量（发送消息流量），其二是下行流量（接收消息的流量）。每种流量在网络传输过程中，有两种形式说明：包的大小，流量的大小。使用手机上网，以手机号为唯一标识符，进行记录。有记录，包括很多信息，需要的信息字段。

　　实际需要的字段：

　　手机号码、上行数据包数、下行数据包数、上行总流量、下行总流量。

2）自定义数据类型（五个字段）

DataWritable implement WritableComparable接口。

  1 package org.dragon.hadoop.mapreduce.app;
  2 
  3 import java.io.DataInput;
  4 import java.io.DataOutput;
  5 import java.io.IOException;
  6 
  7 import org.apache.hadoop.io.Writable;
  8 
  9 /**
 10  * 
 11  * @author ZhuXY
 12  * @time 2016-3-10 下午3:49:55
 13  * 
 14  */
 15 public class DataWritable implements Writable {
 16 
 17     // telsphone
 18 
 19     // upload
 20     private int upPackNum;
 21     private int upPayLoad;
 22 
 23     // download
 24     private int downPackNum;
 25     private int downPayLoad;
 26 
 27     public DataWritable() {
 28 
 29     }
 30 
 31     public void set(int upPackNum, int upPayLoad, int downPackNum,
 32             int downPayload) {
 33         this.upPackNum = upPackNum;
 34         this.upPayLoad = upPayLoad;
 35         this.downPackNum = downPackNum;
 36         this.downPayLoad = downPayload;
 37 
 38     }
 39 
 40     public int getUpPackNum() {
 41         return upPackNum;
 42     }
 43 
 44     public int getUpPayLoas() {
 45         return upPayLoad;
 46     }
 47 
 48     public int getDownPackNum() {
 49         return downPackNum;
 50     }
 51 
 52     public int getDownPayload() {
 53         return downPayLoad;
 54     }
 55 
 56     @Override
 57     public void write(DataOutput out) throws IOException {
 58         out.writeInt(upPackNum);
 59         out.writeInt(upPayLoad);
 60         out.writeInt(downPackNum);
 61         out.writeInt(downPayLoad);
 62     }
 63 
 64     /**
 65      * 讀出的順序要和寫入的順序相同
 66      */
 67     @Override
 68     public void readFields(DataInput in) throws IOException {
 69         // TODO Auto-generated method stub
 70         this.upPackNum = in.readInt();
 71         this.upPayLoad = in.readInt();
 72         this.downPackNum = in.readInt();
 73         this.downPayLoad = in.readInt();
 74     }
 75 
 76     @Override
 77     public String toString() {
 78         return upPackNum + "\t" + upPayLoad + "\t" + downPackNum + "\t"
 79                 + downPayLoad;
 80     }
 81 
 82     @Override
 83     public int hashCode() {
 84         final int prime = 31;
 85         int result = 1;
 86         result = prime * result + downPackNum;
 87         result = prime * result + downPayLoad;
 88         result = prime * result + upPackNum;
 89         result = prime * result + upPayLoad;
 90         return result;
 91     }
 92 
 93     @Override
 94     public boolean equals(Object obj) {
 95         if (this == obj)
 96             return true;
 97         if (obj == null)
 98             return false;
 99         if (getClass() != obj.getClass())
100             return false;
101         DataWritable other = (DataWritable) obj;
102         if (downPackNum != other.downPackNum)
103             return false;
104         if (downPayLoad != other.downPayLoad)
105             return false;
106         if (upPackNum != other.upPackNum)
107             return false;
108         if (upPayLoad != other.upPayLoad)
109             return false;
110         return true;
111     }
112 
113 }

DataWritable Code