diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..13566b8 --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# Default ignored files +/shelf/ +/workspace.xml +# Editor-based HTTP Client requests +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/.idea/encodings.xml b/.idea/encodings.xml new file mode 100644 index 0000000..13627c1 --- /dev/null +++ b/.idea/encodings.xml @@ -0,0 +1,9 @@ + + + + + + + + + \ No newline at end of file diff --git a/.idea/gradle.xml b/.idea/gradle.xml new file mode 100644 index 0000000..cf17d91 --- /dev/null +++ b/.idea/gradle.xml @@ -0,0 +1,17 @@ + + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..f0af8d0 --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,16 @@ + + + + + + + + + + + \ No newline at end of file diff --git a/.idea/vcs.xml b/.idea/vcs.xml new file mode 100644 index 0000000..35eb1dd --- /dev/null +++ b/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/CsvWriterLib/.gradle/8.5/checksums/checksums.lock b/CsvWriterLib/.gradle/8.5/checksums/checksums.lock new file mode 100644 index 0000000..7847f38 Binary files /dev/null and b/CsvWriterLib/.gradle/8.5/checksums/checksums.lock differ diff --git a/CsvWriterLib/.gradle/8.5/checksums/md5-checksums.bin b/CsvWriterLib/.gradle/8.5/checksums/md5-checksums.bin new file mode 100644 index 0000000..6a910b6 Binary files /dev/null and b/CsvWriterLib/.gradle/8.5/checksums/md5-checksums.bin differ diff --git a/CsvWriterLib/.gradle/8.5/checksums/sha1-checksums.bin b/CsvWriterLib/.gradle/8.5/checksums/sha1-checksums.bin new file mode 100644 index 0000000..93de4a0 Binary files /dev/null and b/CsvWriterLib/.gradle/8.5/checksums/sha1-checksums.bin differ diff --git a/CsvWriterLib/.gradle/8.5/checksums/sha256-checksums.bin b/CsvWriterLib/.gradle/8.5/checksums/sha256-checksums.bin new file mode 100644 index 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--git a/CsvWriterLib/.gradle/8.5/fileHashes/fileHashes.lock b/CsvWriterLib/.gradle/8.5/fileHashes/fileHashes.lock new file mode 100644 index 0000000..7a6304f Binary files /dev/null and b/CsvWriterLib/.gradle/8.5/fileHashes/fileHashes.lock differ diff --git a/CsvWriterLib/.gradle/8.5/fileHashes/resourceHashesCache.bin b/CsvWriterLib/.gradle/8.5/fileHashes/resourceHashesCache.bin new file mode 100644 index 0000000..3544695 Binary files /dev/null and b/CsvWriterLib/.gradle/8.5/fileHashes/resourceHashesCache.bin differ diff --git a/CsvWriterLib/.gradle/8.5/gc.properties b/CsvWriterLib/.gradle/8.5/gc.properties new file mode 100644 index 0000000..e69de29 diff --git a/CsvWriterLib/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/CsvWriterLib/.gradle/buildOutputCleanup/buildOutputCleanup.lock new file mode 100644 index 0000000..6e79724 Binary files /dev/null and b/CsvWriterLib/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ diff --git a/CsvWriterLib/.gradle/buildOutputCleanup/cache.properties b/CsvWriterLib/.gradle/buildOutputCleanup/cache.properties new file mode 100644 index 0000000..f023587 --- /dev/null +++ b/CsvWriterLib/.gradle/buildOutputCleanup/cache.properties @@ -0,0 +1,2 @@ +#Mon Sep 29 18:40:09 MSK 2025 +gradle.version=8.5 diff --git a/CsvWriterLib/.gradle/buildOutputCleanup/outputFiles.bin b/CsvWriterLib/.gradle/buildOutputCleanup/outputFiles.bin new file mode 100644 index 0000000..1984c73 Binary files /dev/null and b/CsvWriterLib/.gradle/buildOutputCleanup/outputFiles.bin differ diff --git a/CsvWriterLib/.gradle/file-system.probe b/CsvWriterLib/.gradle/file-system.probe new file mode 100644 index 0000000..6d563bc Binary files /dev/null and b/CsvWriterLib/.gradle/file-system.probe differ diff --git a/CsvWriterLib/.gradle/vcs-1/gc.properties b/CsvWriterLib/.gradle/vcs-1/gc.properties new file mode 100644 index 0000000..e69de29 diff --git a/CsvWriterLib/build.gradle b/CsvWriterLib/build.gradle new file mode 100644 index 0000000..669eeb8 --- /dev/null +++ b/CsvWriterLib/build.gradle @@ -0,0 +1,27 @@ +plugins { + id 'java-library' + id 'maven-publish' +} + +group = 'org.writer' +version = '1.0.0' + +java { + toolchain { + languageVersion = JavaLanguageVersion.of(17) + } + withSourcesJar() + withJavadocJar() +} + +repositories { + mavenCentral() +} + +publishing { + publications { + mavenJava(MavenPublication) { + from components.java + } + } +} diff --git a/CsvWriterLib/gradle/wrapper/gradle-wrapper.jar b/CsvWriterLib/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 0000000..249e583 Binary files /dev/null and b/CsvWriterLib/gradle/wrapper/gradle-wrapper.jar differ diff --git a/CsvWriterLib/gradle/wrapper/gradle-wrapper.properties b/CsvWriterLib/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 0000000..45473be --- /dev/null +++ b/CsvWriterLib/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,6 @@ +#Mon Sep 29 18:40:02 MSK 2025 +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/CsvWriterLib/gradlew b/CsvWriterLib/gradlew new file mode 100644 index 0000000..1b6c787 --- /dev/null +++ b/CsvWriterLib/gradlew @@ -0,0 +1,234 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt +# within the Gradle project. +# +# You can find Gradle at https://github.com/gradle/gradle/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit + +APP_NAME="Gradle" +APP_BASE_NAME=${0##*/} + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD=$JAVA_HOME/jre/sh/java + else + JAVACMD=$JAVA_HOME/bin/java + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + ulimit -n "$MAX_FD" || + warn "Could not set maximum file descriptor limit to $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + +# Collect all arguments for the java command; +# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of +# shell script including quotes and variable substitutions, so put them in +# double quotes to make sure that they get re-expanded; and +# * put everything else in single quotes, so that it's not re-expanded. + +set -- \ + "-Dorg.gradle.appname=$APP_BASE_NAME" \ + -classpath "$CLASSPATH" \ + org.gradle.wrapper.GradleWrapperMain \ + "$@" + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/CsvWriterLib/gradlew.bat b/CsvWriterLib/gradlew.bat new file mode 100644 index 0000000..107acd3 --- /dev/null +++ b/CsvWriterLib/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/CsvWriterLib/settings.gradle b/CsvWriterLib/settings.gradle new file mode 100644 index 0000000..728ada9 --- /dev/null +++ b/CsvWriterLib/settings.gradle @@ -0,0 +1,2 @@ +rootProject.name = 'CsvWriterLib' + diff --git a/CsvWriterLib/src/main/java/org/writer/CsvColumn.java b/CsvWriterLib/src/main/java/org/writer/CsvColumn.java new file mode 100644 index 0000000..960b9e2 --- /dev/null +++ b/CsvWriterLib/src/main/java/org/writer/CsvColumn.java @@ -0,0 +1,12 @@ +package org.writer; + +import java.lang.annotation.ElementType; +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; +import java.lang.annotation.Target; + +@Retention(RetentionPolicy.RUNTIME) +@Target(ElementType.FIELD) +public @interface CsvColumn { + String value(); +} diff --git a/CsvWriterLib/src/main/java/org/writer/CsvWriter.java b/CsvWriterLib/src/main/java/org/writer/CsvWriter.java new file mode 100644 index 0000000..f243b0e --- /dev/null +++ b/CsvWriterLib/src/main/java/org/writer/CsvWriter.java @@ -0,0 +1,141 @@ +package org.writer; + +import java.io.FileWriter; +import java.io.IOException; +import java.lang.reflect.Field; +import java.time.LocalDate; +import java.time.LocalDateTime; +import java.time.format.DateTimeFormatter; +import java.util.Arrays; +import java.util.Collection; +import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.IntStream; +import java.util.stream.Stream; + +public class CsvWriter implements Writable { + + private static final String DELIMITER = ";"; + private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd"); + private static final DateTimeFormatter DATETIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"); + + @Override + public void writeToCsv(List data, String filePath) throws IOException { + if (data == null || data.isEmpty()) { + throw new IllegalArgumentException("Data list cannot be null or empty"); + } + + if (filePath == null || filePath.trim().isEmpty()) { + throw new IllegalArgumentException("File path cannot be null or empty"); + } + + try (FileWriter writer = new FileWriter(filePath)) { + Class clazz = data.get(0).getClass(); + Field[] fields = getAnnotatedFields(clazz); + + String header = generateHeader(fields, data); + writer.write(header + "\n"); + + for (T item : data) { + String row = generateRow(fields, item); + writer.write(row + "\n"); + } + } catch (Exception e) { + throw new IOException("Failed to write CSV file: " + e.getMessage(), e); + } + } + + private Field[] getAnnotatedFields(Class clazz) { + return Arrays.stream(clazz.getDeclaredFields()) + .filter(field -> field.isAnnotationPresent(CsvColumn.class)) + .toArray(Field[]::new); + } + + private String generateHeader(Field[] fields, List data) { + return Arrays.stream(fields) + .flatMap(field -> { + CsvColumn ann = field.getAnnotation(CsvColumn.class); + String baseName = ann.value(); + + if (Collection.class.isAssignableFrom(field.getType())) { + int maxSize = getMaxCollectionSize(field, data); + if (maxSize <= 0) { + return Stream.empty(); + } + return IntStream.range(0, maxSize) + .mapToObj(i -> baseName + (i + 1)); + }else { + return Stream.of(baseName); + } + }) + .collect(Collectors.joining(DELIMITER)); + } + + private int getMaxCollectionSize(Field field, List data) { + + return data.stream() + .mapToInt(obj -> { + if (obj == null) { + return 0; + } + try { + field.setAccessible(true); + Object value = field.get(obj); + if (value instanceof Collection col) { + return col.size(); + } + } catch (IllegalAccessException ignored) { + + } + return 0; + }) + .max() + .orElse(0); + } + + private String generateRow(Field[] fields, T item) { + return Arrays.stream(fields) + .flatMap(field -> { + try { + field.setAccessible(true); + Object value = field.get(item); + + if (value instanceof Collection col) { + return col.stream() + .map(this::formatValue); + } else { + return Stream.of(formatValue(value)); + } + } catch (IllegalAccessException e) { + return Stream.of(""); + } + }) + .collect(Collectors.joining(DELIMITER)); + } + + private String formatValue(Object value) { + if (value == null) { + return ""; + } + + String stringValue; + if (value instanceof LocalDate) { + stringValue = ((LocalDate) value).format(DATE_FORMATTER); + } else if (value instanceof LocalDateTime) { + stringValue = ((LocalDateTime) value).format(DATETIME_FORMATTER); + } else if (value instanceof Boolean) { + stringValue = ((Boolean) value) ? "Yes" : "No"; + } else { + stringValue = value.toString(); + } + + return escapeCsv(stringValue); + } + + private String escapeCsv(String value) { + if (value == null) { + return ""; + } + return "\"" + value.replace("\"", "\"\"") + "\""; + } +} diff --git a/CsvWriterLib/src/main/java/org/writer/Writable.java b/CsvWriterLib/src/main/java/org/writer/Writable.java new file mode 100644 index 0000000..10a1b1b --- /dev/null +++ b/CsvWriterLib/src/main/java/org/writer/Writable.java @@ -0,0 +1,9 @@ +package org.writer; + +import java.io.IOException; +import java.util.List; + +public interface Writable { + + void writeToCsv(List data, String filePath) throws IOException; +} diff --git a/pom.xml b/CsvWriterUser/pom.xml similarity index 71% rename from pom.xml rename to CsvWriterUser/pom.xml index effc1bd..3d6626b 100644 --- a/pom.xml +++ b/CsvWriterUser/pom.xml @@ -5,7 +5,7 @@ 4.0.0 org.writer - csv + CsvWriterUser 1.0-SNAPSHOT @@ -15,18 +15,25 @@ + + org.writer + CsvWriterLib + 1.0.0 + + org.projectlombok lombok 1.18.34 provided + - org.junit.jupiter - junit-jupiter - 5.8.1 - test + com.github.javafaker + javafaker + 1.0.2 + \ No newline at end of file diff --git a/CsvWriterUser/src/main/java/org/writer/Main.java b/CsvWriterUser/src/main/java/org/writer/Main.java new file mode 100644 index 0000000..3ea7c31 --- /dev/null +++ b/CsvWriterUser/src/main/java/org/writer/Main.java @@ -0,0 +1,107 @@ +package org.writer; + + +import com.github.javafaker.Faker; +import org.writer.model.Employee; +import org.writer.model.Months; +import org.writer.model.Person; +import org.writer.model.Student; + +import java.io.IOException; +import java.math.BigDecimal; +import java.time.LocalDate; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; + +public class Main { + public static void main(String[] args) throws IOException { + Faker faker = new Faker(); + + System.out.println("Starting CSV generation..."); + + generatePeopleData(faker); + + generateStudentsData(faker); + + generateEmployeesData(faker); + + System.out.println("All CSV files have been successfully created!"); + System.out.println("Generated files:"); + System.out.println(" - people.csv"); + System.out.println(" - students.csv"); + System.out.println(" - employees.csv"); + } + + private static void generatePeopleData(Faker faker) throws IOException { + System.out.println(" Generating people data..."); + + List people = new ArrayList<>(); + for (int i = 1; i <= 5; i++) { + people.add(Person.builder() + .firstName(faker.name().firstName()) + .lastName(faker.name().lastName()) + .dayOfBirth(faker.number().numberBetween(1, 28)) + .monthOfBirth(Months.values()[faker.number().numberBetween(0, Months.values().length)]) + .yearOfBirth(faker.number().numberBetween(1970, 2005)) + .build()); + } + + new CsvWriter().writeToCsv(people, "people.csv"); + System.out.println(" people.csv created with " + people.size() + " records"); + } + + private static void generateStudentsData(Faker faker) throws IOException { + System.out.println("Generating students data..."); + + List students = new ArrayList<>(); + for (int i = 1; i <= 3; i++) { + students.add(Student.builder() + .name(faker.name().fullName()) + .score(Arrays.asList( + String.valueOf(faker.number().numberBetween(2, 5)), + String.valueOf(faker.number().numberBetween(2, 5)), + String.valueOf(faker.number().numberBetween(2, 5)) + )) + .build()); + } + + new CsvWriter().writeToCsv(students, "students.csv"); + System.out.println("students.csv created with " + students.size() + " records"); + } + + private static void generateEmployeesData(Faker faker) throws IOException { + System.out.println("Generating employees data..."); + + List employees = new ArrayList<>(); + String[] departments = {"IT", "HR", "Finance", "Marketing", "Sales"}; + String[] positions = {"Developer", "Manager", "Analyst", "Designer", "Consultant"}; + String[] skills = {"Java", "Python", "JavaScript", "SQL", "Spring", "React", "Angular", "Docker", "Kubernetes"}; + String[] technologies = {"PostgreSQL", "MySQL", "MongoDB", "Redis", "Elasticsearch"}; + + for (int i = 1; i <= 4; i++) { + employees.add(Employee.builder() + .id((long) i) + .fullName(faker.name().fullName()) + .email(faker.internet().emailAddress()) + .department(departments[faker.number().numberBetween(0, departments.length)]) + .position(positions[faker.number().numberBetween(0, positions.length)]) + .salary(BigDecimal.valueOf(faker.number().randomDouble(2, 3000, 15000))) + .hireDate(LocalDate.now().minusDays(faker.number().numberBetween(1, 1000))) + .skills(Arrays.asList( + skills[faker.number().numberBetween(0, skills.length)], + technologies[faker.number().numberBetween(0, technologies.length)], + skills[faker.number().numberBetween(0, skills.length)] + )) + .projects(Arrays.asList( + faker.company().name() + " Project", + faker.company().name() + " Initiative" + )) + .isActive(faker.random().nextBoolean()) + .build()); + } + + new CsvWriter().writeToCsv(employees, "employees.csv"); + System.out.println(" employees.csv created with " + employees.size() + " records"); + } +} \ No newline at end of file diff --git a/CsvWriterUser/src/main/java/org/writer/model/Employee.java b/CsvWriterUser/src/main/java/org/writer/model/Employee.java new file mode 100644 index 0000000..77cf517 --- /dev/null +++ b/CsvWriterUser/src/main/java/org/writer/model/Employee.java @@ -0,0 +1,46 @@ +package org.writer.model; + +import lombok.AllArgsConstructor; +import lombok.Builder; +import lombok.Data; +import org.writer.CsvColumn; + +import java.math.BigDecimal; +import java.time.LocalDate; +import java.util.List; + +@Data +@Builder +@AllArgsConstructor +public class Employee { + + @CsvColumn("Employee ID") + private Long id; + + @CsvColumn("Full Name") + private String fullName; + + @CsvColumn("Email") + private String email; + + @CsvColumn("Department") + private String department; + + @CsvColumn("Position") + private String position; + + @CsvColumn("Salary") + private BigDecimal salary; + + @CsvColumn("Hire Date") + private LocalDate hireDate; + + @CsvColumn("Skills") + private List skills; + + @CsvColumn("Projects") + private List projects; + + @CsvColumn("Is Active") + private boolean isActive; +} \ No newline at end of file diff --git a/src/main/java/org/writer/model/Months.java b/CsvWriterUser/src/main/java/org/writer/model/Months.java similarity index 98% rename from src/main/java/org/writer/model/Months.java rename to CsvWriterUser/src/main/java/org/writer/model/Months.java index cb7b9c1..a0f829f 100644 --- a/src/main/java/org/writer/model/Months.java +++ b/CsvWriterUser/src/main/java/org/writer/model/Months.java @@ -13,4 +13,4 @@ public enum Months { OCTOBER, NOVEMBER, DECEMBER -} \ No newline at end of file +} diff --git a/src/main/java/org/writer/model/Person.java b/CsvWriterUser/src/main/java/org/writer/model/Person.java similarity index 64% rename from src/main/java/org/writer/model/Person.java rename to CsvWriterUser/src/main/java/org/writer/model/Person.java index ba8576b..dc757e2 100644 --- a/src/main/java/org/writer/model/Person.java +++ b/CsvWriterUser/src/main/java/org/writer/model/Person.java @@ -3,20 +3,26 @@ import lombok.AllArgsConstructor; import lombok.Builder; import lombok.Data; +import org.writer.CsvColumn; @Data @Builder @AllArgsConstructor public class Person { + @CsvColumn("Name") private String firstName; + @CsvColumn("LastName") private String lastName; + @CsvColumn("Day of birth") private int dayOfBirth; + @CsvColumn("Month of birth") private Months monthOfBirth; + @CsvColumn("Year of birth") private int yearOfBirth; - } + diff --git a/src/main/java/org/writer/model/Student.java b/CsvWriterUser/src/main/java/org/writer/model/Student.java similarity index 73% rename from src/main/java/org/writer/model/Student.java rename to CsvWriterUser/src/main/java/org/writer/model/Student.java index 2b549c4..d1156e4 100644 --- a/src/main/java/org/writer/model/Student.java +++ b/CsvWriterUser/src/main/java/org/writer/model/Student.java @@ -3,6 +3,7 @@ import lombok.AllArgsConstructor; import lombok.Builder; import lombok.Data; +import org.writer.CsvColumn; import java.util.List; @@ -11,7 +12,9 @@ @AllArgsConstructor public class Student { + @CsvColumn("Student Name") private String name; + @CsvColumn("Scores") private List score; -} \ No newline at end of file +} diff --git a/README.md b/README.md index d6f44cb..23b5527 100644 --- a/README.md +++ b/README.md @@ -1,20 +1,59 @@ -# Практическое задание 1 # CSV Writer - -Мы пишем приложение, которое должно генерировать отчеты в разных форматах и нам хочется генерировать какой-нибудь отчёт в CSV, но проблема в том, что у нас нет такого инструмента. Поэтому мы решаем, что нам нужна библиотека для генерации CSV файлов. -Реализация может быть построена с помощью Reflection и аннотаций. - -Папка model содержит классы, которые нужно сохранять в CSV. Классы можно изменять и добавлять новые. - -**Описание:**
-✅ Написать реализацию Writable, которая будет сохранять объекты в CSV формате в файл
-✅ Написать unit тесты
-✅ Написать JavaDoc
-✅ Для генерации тестовых данных можно использовать Datafaker
-✅ В main должно быть несколько примеров сохранения данных в файл - -**Как выполнить:** -1. Сделать форк этого проекта -2. Сделать ветку dev в своем проекте. Выполнять работу в ней -3. После выполнения работы открыть Pull Request в master -4. Назначить ментора ревьювером -5. Отправить ссылку на PR в тг чат ментору \ No newline at end of file +# CSV Writer Library + +Универсальная Java библиотека для генерации CSV файлов с использованием Reflection и аннотаций. + +## Возможности + +- **Автоматическая генерация CSV** на основе Reflection и аннотаций +- **Поддержка коллекций** - автоматическое разворачивание в отдельные колонки +- **Умное форматирование** различных типов данных (String, Number, Boolean, LocalDate, LocalDateTime) +- **Экранирование CSV** - корректная обработка специальных символов +- **Гибкая настройка** заголовков колонок через аннотации +- **Обработка ошибок** с информативными сообщениями + +## Установка и запуск + +### Сборка проекта + +```bash +mvn clean compile +``` + +### Запуск примеров + +```bash +mvn exec:java -Dexec.mainClass="org.writer.Main" +``` + +### Запуск тестов + +```bash +mvn test +``` + +## Особенности реализации + +### Обработка коллекций + +Коллекции автоматически разворачиваются в несколько колонок: + +### Экранирование CSV + +- Все значения оборачиваются в двойные кавычки +- Внутренние кавычки удваиваются +- Null значения преобразуются в пустые строки + +### Фильтрация полей + +В CSV включаются только поля, помеченные аннотацией `@CsvColumn`. + +## Тестирование + +Проект включает comprehensive unit тесты, покрывающие: + +- Запись простых объектов +- Запись объектов с коллекциями +- Обработка ошибок и валидация +- Форматирование различных типов данных +- Экранирование CSV +- Работа с коллекциями разного размера diff --git a/src/main/java/org/writer/Main.java b/src/main/java/org/writer/Main.java deleted file mode 100644 index 40e8213..0000000 --- a/src/main/java/org/writer/Main.java +++ /dev/null @@ -1,7 +0,0 @@ -package org.writer; - -public class Main { - public static void main(String[] args) { - System.out.println("Hello world!"); - } -} \ No newline at end of file diff --git a/src/main/java/org/writer/Writable.java b/src/main/java/org/writer/Writable.java deleted file mode 100644 index 9f60c45..0000000 --- a/src/main/java/org/writer/Writable.java +++ /dev/null @@ -1,9 +0,0 @@ -package org.writer; - -import java.util.List; - -public interface Writable { - - void writeToFile(List data, String fileName); - -}