2.27号今日总结

今天下午上的软件工程,一直对课上练习进行编译改正

代码如下:

package basic;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Objects;

public class Max {

    private static int letterBack(String letter){
        char[] res = letter.toCharArray();
        return (res[res.length-1]-'a');
    }
    private static int letterFront(String letter){
        char[] res = letter.toCharArray();
        return (res[0]-'a');
    }
    public static void main(String[] args) throws IOException {
//        FileInputStream file = new FileInputStream("E:\\workspace\\untitled\\src\\main\\java\\com\\atguigu\\git\\makr.txt");
//        InputStreamReader reader = new InputStreamReader(file);
//        BufferedReader bufferedReader = new BufferedReader(reader);
//        String temp = "";
//        while ((temp=bufferedReader.readLine())!=null){
//            System.out.println(temp);
//        }
//        bufferedReader.close();
        String ph = "D:\\IDEA项目\\input1.txt";
        if(!new File(ph).exists()){
            System.out.println("文件路径不存在");
            return;
        }
        Path path = Paths.get(ph);

        byte[] data = Files.readAllBytes(path);
        String result = new String(data, StandardCharsets.UTF_8);
        result = result.replaceAll("[^a-zA-Z0-9\\u4e00-\\u9fa5]"," ");

//        System.out.println(result);
        int lastLetter = -1;
        int currLength = 0;
        int MaxLength = 0;
        String[] results = result.split(",|.|，|。");
        int cur = 0;
        String[] others = result.split(" ");
        for (int i = 0; i < others.length; i++) {
            String str = others[i];
            if (str.equals("")) continue;
            if(str.length()==1){
                if(MaxLength<currLength){
                    MaxLength = currLength;
                    cur = i;
                }
                currLength = 0;
                lastLetter = -1;
                continue;
            }
            int front = letterFront(str);
            int back = letterBack(str);
            if (lastLetter == -1 || lastLetter == front) {
                currLength++;
                if(MaxLength<currLength){
                    MaxLength = currLength;
                    cur = i;
                }
                lastLetter = back;
            } else {
                if(MaxLength<currLength){
                    MaxLength = currLength;
                    cur = i;
                }
                currLength = 1;
                lastLetter = back;
            }
//            if (MaxLength == 5) {
//                System.out.println(str);
//                System.out.println(i);
//            }

        }
        System.out.println("最大链是"+MaxLength);
        String s= "";
        for(int i=cur-MaxLength+1;i<=cur;i++){
            if(Objects.equals(others[i], "")||Objects.equals(others[i]," "))continue;
            s+=others[i];
            s+=" ";
        }
        System.out.println(s);

        File writeName = new File("D:\\IDEA项目\\output1.txt");
        if (!writeName.exists()){
            writeName.createNewFile();
        }
        FileWriter writer = new FileWriter(writeName);
        BufferedWriter out = new BufferedWriter(writer);
        out.write(String.valueOf(MaxLength)+"\n");
        out.write("链是："+s);
        out.flush(); // 把缓存区内容压入文件
        out.close();
    }
}