张三 语文12 数学31 英语11

李四 语文22 数学22 英语22

王五 语文33 数学33 英语33

张三 语文12 数学31 英语11 总分54

李四 语文22 数学22 英语22 总分66

王五 语文33 数学33 英语33 总分99

package com.my.test;

import java.io.*;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class AnalysisResult {

    private static Pattern r = Pattern.compile("(\\d+)");

    private static int getTotal(String line) {

        Matcher m = r.matcher(line);

        int total = 0;

        while (m.find()) {

            total += Integer.valueOf(m.group(0));

        }

        return total;

    }

    public static void main(String args[]) {

        try {

            /* 读入TXT文件 */

            File readFile = new File("input.txt");

            InputStreamReader inputStreamReader = new InputStreamReader(

                    new FileInputStream(readFile));

            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String line;

            List<String> contents = new ArrayList<>();

            while ((line = bufferedReader.readLine()) != null) {

                contents.add(line);

            }

            bufferedReader.close();

            /* 写入TXT文件 */

            File writeFile = new File("output.txt");

            BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(writeFile, true));

            PrintWriter pw = new PrintWriter(bufferedWriter);

            for (int i = 0; i != contents.size(); ++i) {

                String temp = contents.get(i);

                pw.println(temp + " 总分" + getTotal(temp));

            }

            bufferedWriter.flush();

            bufferedWriter.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

Today, when I go home after school, I find that I lose my key.

I feel so worried and try to remember all the places I have been to.

As I walk into the shop, an old man stops me and asks if I lose the key.

I feel so excited and say yes. At last, I find my key and go home.

Though I am lucky this time, I tell myself not to do it again.

package com.my.test;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStreamReader;

import java.util.*;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class WordStatistic {

    private static int total = 0;

    private static Pattern r = Pattern.compile("(\\b[a-zA-Z]+\\b)");

    private static Map<String, Integer> wordMap = new HashMap<>();

    private static void countWords(String line) {

        Matcher m = r.matcher(line);

        while (m.find()) {

            total++;

            String word = m.group(0);

            Integer wordCount = wordMap.get(word);

            if (wordCount != null) {

                wordMap.put(word, wordCount + 1);

            } else {

                wordMap.put(word, 1);

            }

        }

    }

    private static List sortByValue(Map<String, Integer> map) {

        List<Map.Entry<String, Integer>> result = new ArrayList<>(map.entrySet());

        result.sort(Comparator.comparing(Map.Entry::getValue));

        return result;

    }

    public static void main(String[] args) {

        try {

            /* 读入TXT文件 */

            File readFile = new File("input.txt");

            InputStreamReader inputStreamReader = new InputStreamReader(

                    new FileInputStream(readFile));

            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String line;

            while ((line = bufferedReader.readLine()) != null) {

                countWords(line);

            }

            bufferedReader.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

        System.out.println("单词总数：" + total);

        System.out.println("不同单词的个数：" + wordMap.size());

        List list = sortByValue(wordMap);

        for (int i = list.size() - 1; i != 0; --i) {

            System.out.println(list.get(i));

        }

    }

}