public void readFileTest() throws IOException{
        //文件路径
        String path = "/home/hadoop/study/data/access.log.10";
        BufferedReader reader = new BufferedReader(
               new InputStreamReader(new FileInputStream(new File(path)))
        );
        String line = "";
        UserAgentParser userAgentParser  = new UserAgentParser();
        UserAgent agent ;
        Map<String,Integer> broswerMap = new HashMap<String,Integer>();
        int i = 0 ;
        while(line != null){
            line = reader.readLine(); //一次读一行数据
            i ++;
            if(StringUtils.isNotBlank(line)){//判断是否为空
                String source = line.substring(getCharacterPosition(line,"\"",5) + 1);
                agent = userAgentParser.parse(source);
                String browser = agent.getBrowser();
                String engine = agent.getEngine();
                String engineVersion = agent.getEngineVersion();
                String os = agent.getOs();
                String platform = agent.getPlatform();
                boolean isMobile = agent.isMobile();

                Integer broswerValue = broswerMap.get(browser);
                if(broswerMap.get(browser) != null){
                    broswerMap.put(browser,broswerValue + 1);
                }else{
                    broswerMap.put(browser,1);
                }
//                System.out.println(browser + "," + engine + " " + engineVersion + " " + os + " " + platform);
            }
        }
        //一共有多少条数据
        System.out.println(i-1);
        System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
        for(Map.Entry<String,Integer> entry : broswerMap.entrySet()){
            System.out.println(entry.getKey() + " : " + entry.getValue());
        }
    }

/**
	* 获取指定字符串中指定标识的字符串出现的索引
	* @return
	*/
private int getCharacterPosition(String value,String operator,int index){
	Matcher slashMatcher = Pattern.compile(operator).matcher(value);
	int mIndex = 0;
	while(slashMatcher.find()){
		mIndex ++;
		if(mIndex == index){
			break;
		}
	}
	return slashMatcher.start();
}

package com.hadoop.project;

import com.kumkee.userAgent.UserAgent;
import com.kumkee.userAgent.UserAgentParser;
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 java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 使用MapReduce 统计浏览器的访问次数
 */
public class LogApp {


    public static class MyMapper extends Mapper<LongWritable,Text,Text,LongWritable> {
        LongWritable plusone = new LongWritable(1);
        private UserAgentParser userAgentParser ;
        @Override
        protected void setup(Context context) throws IOException, InterruptedException {
            userAgentParser = new UserAgentParser();
        }

        @Override
        protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
            UserAgent agent ;

            //先读入没一行数据
            String line = value.toString();

            String source = line.substring(getCharacterPosition(line,"\"",5) + 1);
            agent = userAgentParser.parse(source);
            String browser = agent.getBrowser();

                context.write(new Text(browser),plusone);

        }

        @Override
        protected void cleanup(Context context) throws IOException, InterruptedException {
            userAgentParser = null;
        }
    }

    public static class MyReducer extends Reducer<Text,LongWritable,Text,LongWritable>{
        @Override
        protected void reduce(Text key, Iterable<LongWritable> values, Context context) throws IOException, InterruptedException {
            long sum = 0 ;
            for(LongWritable value : values){
                sum += value.get();//通过get()转化为java中的类型
            }

            //最终统计结果输出
            context.write(key,new LongWritable(sum));
        }
    }

    /**
     * 获取指定字符串中指定标识的字符串出现的索引
     * @return
     */
    private static int getCharacterPosition(String value,String operator,int index){
        Matcher slashMatcher = Pattern.compile(operator).matcher(value);
        int mIndex = 0;
        while(slashMatcher.find()){
            mIndex ++;
            if(mIndex == index){
                break;
            }
        }
        return slashMatcher.start();
    }

    public static void main(String[] args) throws IOException,ClassNotFoundException,InterruptedException {
        Configuration configuration = new Configuration();

        Path outputPath = new Path(args[1]);
        FileSystem fileSystem = FileSystem.get(configuration);
        if(fileSystem.exists(outputPath)){
            fileSystem.delete(outputPath,true);
            System.out.println("filePath exists,but it has deleted");
        }

        Job job = Job.getInstance(configuration,"LogBrowser");

        job.setJarByClass(LogApp.class);

        FileInputFormat.setInputPaths(job,new Path(args[0]));

        job.setMapperClass(LogApp.MyMapper.class);

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

        job.setCombinerClass(LogApp.MyReducer.class);

        job.setReducerClass(LogApp.MyReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(LongWritable.class);

        FileOutputFormat.setOutputPath(job,new Path(args[1]));

        System.out.println(job.waitForCompletion(true)? 0 : 1);
    }
}