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Add Module 9
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‎m09-working-with-files-and-the-network/BankStatement/README.md

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#### 9.9. Домашняя работа 9.3
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**Цель задания**
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Научиться читать файл CSV и анализировать его.
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**Что нужно сделать**
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1. Создать новый проект, который будет читать файл csv банковской выписки movementsList.csv и парсить полученные строки. Путь к файлу выписки храните в константе.
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2. Код должен выводить сводную информацию по этой выписке: общий приход, общий расход и разбивку расходов.
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3. Примеры работы программы
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Сумма расходов: 398 563.39 руб.
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Сумма доходов: 289 890.06 руб.
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Суммы расходов по организациям:
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RUSMOSKVA56 SHLOVE REPUBLIC 1 081.53 руб.
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RUSMOSCOW42 SHCL ETOILE 126.34 руб.
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RUSPUSHKINO105ZOOMAGAZIN 4 217.65 руб.
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**Критерии оценки**
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«Зачёт» — после запуска программы в консоль выводятся суммы и расходы по организациям.
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«Незачёт» — задание не выполнено.

‎m09-working-with-files-and-the-network/BankStatement/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>ru.radmitr</groupId>
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<artifactId>bank-statement</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<!-- compiler -->
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<maven.compiler.source>17</maven.compiler.source>
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<maven.compiler.target>17</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<!-- dependencies -->
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<junit.version>5.9.3</junit.version>
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<log4j.version>2.20.0</log4j.version>
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<lombok.version>1.18.28</lombok.version>
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<commons.csv.version>1.10.0</commons.csv.version>
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<!-- plugins -->
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<compiler.plugin.version>3.11.0</compiler.plugin.version>
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<surefire.plugin.version>3.1.2</surefire.plugin.version>
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<assembly.plugin.version>3.6.0</assembly.plugin.version>
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</properties>
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<dependencies>
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<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-engine -->
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-engine</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api -->
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter-api</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
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<dependency>
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<groupId>org.apache.logging.log4j</groupId>
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<artifactId>log4j-core</artifactId>
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<version>${log4j.version}</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>${lombok.version}</version>
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<scope>provided</scope>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-csv -->
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-csv</artifactId>
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<version>${commons.csv.version}</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>${compiler.plugin.version}</version>
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</plugin>
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<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-surefire-plugin -->
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>${surefire.plugin.version}</version>
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</plugin>
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<!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-assembly-plugin -->
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<plugin>
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<artifactId>maven-assembly-plugin</artifactId>
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<version>${assembly.plugin.version}</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>single</goal>
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</goals>
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</execution>
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</executions>
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<configuration>
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<archive>
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<manifest>
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<addClasspath>true</addClasspath>
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<mainClass>Main</mainClass>
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</manifest>
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</archive>
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<descriptorRefs>
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<descriptorRef>jar-with-dependencies</descriptorRef>
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</descriptorRefs>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎m09-working-with-files-and-the-network/BankStatement/src/main/java/ru/radmitr/MainUsingCommonsCsv.java

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package ru.radmitr;
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import org.apache.commons.csv.CSVFormat;
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import org.apache.commons.csv.CSVRecord;
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import ru.radmitr.pojo.BankAccount;
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import ru.radmitr.pojo.Transaction;
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.IOException;
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import java.time.LocalDate;
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import java.time.format.DateTimeFormatter;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.TreeMap;
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import java.util.stream.Collectors;
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import static ru.radmitr.Utility.*;
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public class MainUsingCommonsCsv {
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private static final String CSV_FILE_PATH = "src/main/resources/movementList.csv";
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private static final DateTimeFormatter CSV_DATE_FORMATTER = DateTimeFormatter.ofPattern("dd.MM.yy");
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public static void main(String[] args) throws IOException {
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List<Transaction> transactions = loadTransactionsFromFile(CSV_FILE_PATH);
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System.out.println("Сумма доходов: " + transactions.stream()
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.mapToDouble(Transaction::getIncome).sum());
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System.out.println("Сумма расходов: " + transactions.stream()
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.mapToDouble(Transaction::getExpense).sum());
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System.out.println("--------------------------------------------------------");
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System.out.println("Сумма доходов по организациям: ");
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transactions.stream()
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.collect(Collectors.groupingBy(Transaction::getRecipient,
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TreeMap::new, Collectors.toSet()))
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.entrySet().stream()
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.forEach(group -> {
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double sum = group.getValue().stream().mapToDouble(Transaction::getIncome).sum();
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if (sum == 0) {
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return;
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}
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System.out.format("\t %-30s %.2f руб.\n", group.getKey(), sum);
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});
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System.out.println("\nСумма расходов по организациям: ");
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transactions.stream()
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.collect(Collectors.groupingBy(Transaction::getRecipient,
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TreeMap::new, Collectors.toSet()))
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.entrySet().stream()
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.forEach(group -> {
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double sum = group.getValue().stream().mapToDouble(Transaction::getExpense).sum();
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if (sum == 0) {
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return;
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}
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System.out.format("\t %-30s %.2f руб.\n", group.getKey(), sum);
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});
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}
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/**
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* Load transactions from CSV file using commons CSV
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*/
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private static List<Transaction> loadTransactionsFromFile(String path) throws IOException {
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List<Transaction> tranList = new ArrayList<>();
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BufferedReader br = null;
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try {
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br = new BufferedReader(new FileReader(path), 1000);
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Iterable<CSVRecord> csvRecords = CSVFormat.DEFAULT.builder()
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.setHeader().setSkipHeaderRecord(true).build().parse(br);
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for (CSVRecord record : csvRecords) {
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tranList.add(new Transaction(
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new BankAccount(record.get("Номер счета"), record.get("Тип счёта"), record.get("Валюта")),
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LocalDate.parse(record.get("Дата операции"), CSV_DATE_FORMATTER),
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record.get("Референс проводки"),
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record.get("Описание операции"),
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extractRecipientName(record.get("Описание операции")),
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getDouble(record.get("Приход")),
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getDouble(record.get("Расход"))
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)
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);
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}
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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br.close();
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}
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return tranList;
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}
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}

‎m09-working-with-files-and-the-network/BankStatement/src/main/java/ru/radmitr/MainUsingCycles.java

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package ru.radmitr;
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import ru.radmitr.pojo.BankAccount;
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import ru.radmitr.pojo.Transaction;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.time.LocalDate;
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import java.time.format.DateTimeFormatter;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.TreeSet;
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import java.util.stream.Collectors;
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import static ru.radmitr.Utility.*;
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public class MainUsingCycles {
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private static final String CSV_FILE_PATH = "src/main/resources/movementList.csv";
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private static final DateTimeFormatter CSV_DATE_FORMATTER = DateTimeFormatter.ofPattern("dd.MM.yy");
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public static void main(String[] args) {
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ArrayList<Transaction> transactions = loadTransactionsFromFile(CSV_FILE_PATH);
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System.out.println("Сумма доходов: " + transactions.stream()
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.mapToDouble(Transaction::getIncome).sum());
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System.out.println("Сумма расходов: " + transactions.stream()
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.mapToDouble(Transaction::getExpense).sum());
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System.out.println("--------------------------------------------------------");
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TreeSet<String> recipients = transactions.stream()
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.map(Transaction::getRecipient)
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.collect(Collectors.toCollection(TreeSet::new));
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System.out.println("Сумма доходов по организациям: ");
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for (String rec : recipients) {
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double sum = 0;
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for (Transaction tran : transactions) {
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if (tran.getRecipient().equals(rec) && (tran.getIncome() > 0)) {
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sum += tran.getIncome();
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}
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}
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if (sum > 0) {
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System.out.format("\t %-30s %.2f руб.\n", rec, sum);
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}
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}
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System.out.println("\nСумма расходов по организациям: ");
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for (String rec : recipients) {
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double sum = 0;
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for (Transaction tran : transactions) {
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if (tran.getRecipient().equals(rec) && (tran.getExpense() > 0)) {
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sum += tran.getExpense();
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}
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}
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if (sum > 0) {
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System.out.format("\t %-30s %.2f руб.\n", rec, sum);
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}
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}
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}
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/**
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* Load transactions from CSV file
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*/
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private static ArrayList<Transaction> loadTransactionsFromFile(String path) {
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ArrayList<Transaction> tranList = new ArrayList<>();
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try {
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List<String> lines = Files.readAllLines(Paths.get(path));
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lines.remove(0);
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for (String line : lines) {
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// in numbers, replace the comma with a dot and divide the string into columns by comma
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String[] columnArr = line.replaceAll("\"([\\d&&[^\"]]*),([\\d&&[^\"]]+)\"", "$1.$2")
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.split(",");
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if (columnArr.length != 8) {
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System.out.println("Wrong line: " + line);
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continue;
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}
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tranList.add(new Transaction(
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new BankAccount(columnArr[1], columnArr[0], columnArr[2]),
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LocalDate.parse(columnArr[3], CSV_DATE_FORMATTER),
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columnArr[4],
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columnArr[5],
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extractRecipientName(columnArr[5]),
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Double.parseDouble(columnArr[6]),
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Double.parseDouble(columnArr[7])
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)
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);
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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return tranList;
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}
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}

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