CrUD_Full_Version

CRUD_2_CRUD_Runner.java

package CRUD_2;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.*;

/**
 * Created by 33558 on 09.05.2016.
 */
public class CRUD_Runner {

    public static final List<User> users = new ArrayList<>();
    public static final String WAY_TO_USER_FILE = "C:/Users/33558/IdeaProjects/OOP/src/CRUD_2/fileUsers";

    public static void main(String[] args) {
        System.out.println("Program is begin :");
        menuVoids();
        readUsersFromUserFile();
        while (true) {
            args = consoleLineReader(args);
            if (commandExit(args[0])) break;
            usersVoids(args);
        }
        writeUsersToUserFile();
    }

    private static void menuVoids() {
        System.out.println("For using write commands & information ");
        System.out.println("For creating use; -c Name(Andrei) sex(true/false) age(29)");
        System.out.println("For deleting use; -d id(1)");
        System.out.println("For updating use; -d id(1) Name(Andrei) sex(true/false) age(29)");
        System.out.println("For information use; -i id(1)");
        System.out.println("For END use: exit");
    }

    private static boolean commandExit(String arg) {
        if (arg.equalsIgnoreCase("exit")) {
            System.out.println("END program.");
            return true;
        }
        return false;
    }

    private static String[] consoleLineReader(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        try {
            String line = br.readLine();
            args = line.split(" ");
            return args;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return args;
    }


    private static void usersVoids(String[] args) {
        switch (args[0]) {
            case "-c": {
                System.out.println("Start creating new User");
                System.out.println(args[1] + " " + args[2] + " " + args[3]);
                createUserToUserList(args);
                System.out.println("New User is create.");
                break;
            }
            case "-d": {
                System.out.println("Start deleting User - " + args[1]);
                dellUserFromUserList(args[1]);
                System.out.println("Deleting complete.");
                break;
            }
            case "-u": {
                System.out.println("Start update user:" + args[1]);
                updateUser(args);
                System.out.println("Updating complete.");
                break;
            }
            case "-i": {
                System.out.println("Here information about User: " + args[1]);
                getUserInformation(args);
                System.out.println("Information complete.");
                break;
            }
            default: {
                System.out.println("Unknown operation:");
                break;
            }
        }
    }

    private static void getUserInformation(String[] userIdArgs) {
        for (User user : users) {
            if (user.getId() == Integer.parseInt(userIdArgs[1])) {
                System.out.println(user.toString());
                break;
            }
        }
    }

    private static void updateUser(String[] args) {
        for (User user : users) {
            if (user.id == Integer.parseInt(args[1])) {
                user.setName(args[2]);
                user.setSex(Boolean.parseBoolean(args[3]));
                user.setAge(Integer.parseInt(args[4]));
                System.out.println("User update to :" + user.toString());
                break;
            }
        }
    }

    private static void writeUsersToUserFile() {
        try {
            File file = new File(WAY_TO_USER_FILE);
            FileOutputStream outFile = new FileOutputStream(file, false);
            String tempFile = "";
            tempFile = getUsersToString(tempFile);
            byte[] temp = tempFile.getBytes();
            outFile.write(temp);
            outFile.flush();
            outFile.close();
        } catch (IOException e) {
            System.out.println("new User is not writing, try again User consist from command (-c name sex age)");
        }
    }

    private static String getUsersToString(String tempFile) {
        for (User user : users) {
            tempFile += user.id + " " + user.getName() + " " + user.sex + " " + user.age + "\n";
        }
        return tempFile;
    }

    private static void readUsersFromUserFile() {
        File file = new File(WAY_TO_USER_FILE);
        try (BufferedReader reader = new BufferedReader(
                new InputStreamReader(
                        new FileInputStream(file), StandardCharsets.UTF_8))) {
            String line;
            while ((line = reader.readLine()) != null) {
                String[] userArgs = line.split(" ");
                createUserToUserList(userArgs);
            }
        } catch (IOException e) {
            // log error
        }
    }

    private static void dellUserFromUserList(String dellUserArgs) {
        User user = users.remove(Integer.parseInt(dellUserArgs));
        System.out.println(user.toString());
    }

    private static void createUserToUserList(String[] newUserArgs) {
        User tempUser = new User();
        tempUser.setId(User.nextID++);
        tempUser.setName(newUserArgs[1]);
        tempUser.setSex(Boolean.parseBoolean(newUserArgs[2]));
        tempUser.setAge(Integer.parseInt(newUserArgs[3]));
        users.add(tempUser);
        }
}

CRUD_2_fileUsers

0 Tom false 22
1 Tom false 55
2 Tom false 55
3 Tom false 55
4 Sam true 20
5 Den true 35
6 Julia_Zainka false 22
7 Tom false 22
8 Tom false 55
9 Tom false 55
10 Tom false 55
11 Sam true 20
12 Den true 35
13 Julia_Zainka false 22

CRUD_2_User.java

package CRUD_2;

/**
 * Created by 33558 on 09.05.2016.
 */
public class User {
    static int nextID = 0;
    String name;
    boolean sex;
    int age;
    int id;

    public User() {
    }

    public static void setNextID(int nextID) {
        User.nextID = nextID;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public boolean isSex() {
        return sex;
    }

    @Override
    public String toString() {
        return id + " " + name + " " +
                " " + sex +
                " " + age;
    }

    public void setSex(boolean sex) {
        this.sex = sex;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}