java reg

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class FooBarMainEntry {

    public static void main(String[] args) {
        List<String> all = FileHelper.readFileToStringList("data.txt");
        List<Pattern> patternList = new ArrayList<Pattern>();
        patternList.add(Pattern.compile("id.{1,15}"));
        patternList.add(Pattern.compile("name.{1,13}"));
        patternList.add(Pattern.compile("att.{5,30}"));
        for(String line : all) {
            StringHelper.extractPatternFromString(patternList,line,"###");
        }
    }
}


class FileHelper {
    public static String readFileToString(String filePath){
        String content = "";

        try{
            content = new String ( Files.readAllBytes( Paths.get(filePath) ) );
        }
        catch (IOException e){
            e.printStackTrace();
        }

        return content;
    }

    public static List<String> readFileToStringList(String filePath)
    {
        List<String> result=new ArrayList<String>();
        try (Stream<String> stream = Files.lines( Paths.get(filePath),StandardCharsets.UTF_8)){
            stream.forEach(s -> result.add(s));
        }
        catch (IOException e){
            e.printStackTrace();
        }
        return result;
    }

    public static void overWriteStringToFile(String filePath,String content) {

        try{
            BufferedWriter writer = new BufferedWriter(new FileWriter(filePath));
            writer.write(content);
            writer.close();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }

    public static void appendStringToFile(String filePath,String content) {

        try{
            BufferedWriter writer = new BufferedWriter(new FileWriter(filePath,true));
            writer.append(content);
            writer.close();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }

    public static void overWriteStringListToFile(String filePath,List<String> content) {
        if(content.isEmpty()) {
            return;
        }
        try{
            BufferedWriter writer = new BufferedWriter(new FileWriter(filePath));
            writer.write(content.get(0));
            writer.append("n");
            for(int i =1; i< content.size()-1;++i) {
                writer.append(content.get(i));
                writer.append("n");
            }
            writer.append(content.get(content.size()-1));
            writer.close();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }

    public static void appendStringListToFile(String filePath,List<String> content) {
        if(content.isEmpty()) {
            return;
        }
        try{
            BufferedWriter writer = new BufferedWriter(new FileWriter(filePath,true));
            for(int i =0; i< content.size()-1;++i) {
                writer.append(content.get(i));
                writer.append("n");
            }
            writer.append(content.get(content.size()-1));
            writer.close();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }
}


class StringHelper {
    public static String extractPatternFromString(final List<Pattern> patterns,final String inputString,final String outSeperator){
        StringBuilder result = new StringBuilder();

        for(Pattern p : patterns) {
            Matcher matcher = p.matcher(inputString);
            while (matcher.find()) {
                result.append(inputString.substring(matcher.start(),matcher.end()));
                result.append(outSeperator);
            }
            matcher.reset();
        }
        System.out.println(result.toString());
        return result.toString();
    }
}