QpsMain

QpsMain.java

package com.example;

import java.io.*;
import java.util.*;

/**
 * User:  fuxueliang
 * Date:  2019/4/27
 * Email: [email protected]
 */
public class QpsMain {


    public static void main(String[] args) throws Exception {
        long start = System.currentTimeMillis();
        File file = new File("/tmp/ss");
        if (file.isFile()) {
            Map<String, Long> map = normalRead(file);
            map.entrySet().stream().sorted(Comparator.comparing(Map.Entry<String,Long>::getValue).reversed().thenComparing(Map.Entry::getKey)).forEach(item ->
                    System.out.println(item.getValue() + " " + item.getKey() + ""));
        }
        System.out.println(" time is : " + (System.currentTimeMillis() - start) + " ms");
    }


    public static Map<String, Long> normalRead(File file) throws Exception {
        Map<String, Long> map = new HashMap<>();
        try (
                FileReader fileReader = new FileReader(file);
                BufferedReader bufferedReader = new BufferedReader(fileReader)) {

            String line;
            while ((line = bufferedReader.readLine()) != null) {
                line = line.replace("\n", "").split("\\|")[0];
                Long count = map.get(line);
                if (count != null) {
                    count += 1;
                } else {
                    count = 1L;
                }
                map.put(line, count);
            }
        }
        return map;
    }

}