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BAEL-5942 Code changes (#13147)
* BAEL-5942 Code changes * BAEL-5942 Code changes * BAEL-5942 Code updates from Review * BAEL-5942 Code updates from Review * BAEL-5942 Code updates from Review * BAEL-5942 Code updates from Review * BAEL-5942 Code updates from Review * BAEL-5942 Code updates from Review * BAEL-5942 Test updates from Review * BAEL-5942 Test updates from Review * BAEL-5942 Test updates from Review
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‎spring-web-modules/pom.xml‎

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<module>spring-mvc-basics-4</module>
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<module>spring-mvc-basics-5</module>
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<module>spring-mvc-crash</module>
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<module>spring-mvc-file</module>
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<module>spring-mvc-forms-jsp</module>
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<module>spring-mvc-forms-thymeleaf</module>
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<module>spring-mvc-java</module>

‎spring-web-modules/spring-mvc-file/.gitignore‎

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*.class
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#folders#
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/target
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# Packaged files #
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*.jar
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*.war
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*.ear

‎spring-web-modules/spring-mvc-file/README.md‎

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## Spring MVC File
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### The Course
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### Relevant Articles:
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‎spring-web-modules/spring-mvc-file/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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<artifactId>spring-mvc-file</artifactId>
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<version>0.1-SNAPSHOT</version>
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<name>spring-mvc-file</name>
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<packaging>jar</packaging>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-boot-2</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<relativePath>../../parent-boot-2</relativePath>
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</parent>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>commons-io</groupId>
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<artifactId>commons-io</artifactId>
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<version>${commons-io.version}</version>
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</dependency>
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</dependencies>
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<build>
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<finalName>spring-mvc-file</finalName>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<configuration>
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<mainClass>com.baeldung.Application</mainClass>
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<layout>JAR</layout>
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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>

‎spring-web-modules/spring-mvc-file/src/main/java/com/baeldung/Application.java‎

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package com.baeldung;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class Application {
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public static void main(String[] args) {
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SpringApplication.run(Application.class, args);
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}
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}

‎spring-web-modules/spring-mvc-file/src/main/java/com/baeldung/file/CustomMultipartFile.java‎

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package com.baeldung.file;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import org.springframework.web.multipart.MultipartFile;
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public class CustomMultipartFile implements MultipartFile {
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private byte[] input;
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public CustomMultipartFile(byte[] input) {
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this.input = input;
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}
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@Override
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public String getName() {
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return null;
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}
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@Override
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public String getOriginalFilename() {
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return null;
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}
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@Override
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public String getContentType() {
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return null;
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}
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@Override
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public boolean isEmpty() {
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return input == null || input.length == 0;
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}
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@Override
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public long getSize() {
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return input.length;
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}
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@Override
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public byte[] getBytes() throws IOException {
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return input;
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}
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@Override
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public InputStream getInputStream() throws IOException {
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return new ByteArrayInputStream(input);
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}
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@Override
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public void transferTo(File destination) throws IOException, IllegalStateException {
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try(FileOutputStream fos = new FileOutputStream(destination)) {
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fos.write(input);
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}
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}
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}

‎spring-web-modules/spring-mvc-file/src/test/java/com/baeldung/file/CustomMultipartFileUnitTest.java‎

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package com.baeldung.file;
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import java.io.IOException;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import org.springframework.mock.web.MockMultipartFile;
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class CustomMultipartFileUnitTest {
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@Test
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void whenProvidingByteArray_thenMultipartFileCreated() throws IOException {
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byte[] inputArray = "Test String".getBytes();
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CustomMultipartFile customMultipartFile = new CustomMultipartFile(inputArray);
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Assertions.assertFalse(customMultipartFile.isEmpty());
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Assertions.assertArrayEquals(inputArray, customMultipartFile.getBytes());
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Assertions.assertEquals(inputArray.length, customMultipartFile.getSize());
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}
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@Test
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void whenProvidingEmptyByteArray_thenMockMultipartFileIsEmpty() throws IOException {
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byte[] inputArray = "".getBytes();
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MockMultipartFile mockMultipartFile = new MockMultipartFile("tempFileName", inputArray);
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Assertions.assertTrue(mockMultipartFile.isEmpty());
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}
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@Test
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void whenProvidingNullByteArray_thenMockMultipartFileIsEmpty() throws IOException {
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byte[] inputArray = null;
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MockMultipartFile mockMultipartFile = new MockMultipartFile("tempFileName", inputArray);
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Assertions.assertTrue(mockMultipartFile.isEmpty());
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}
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@Test
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void whenProvidingByteArray_thenMultipartFileInputSizeMatches() throws IOException {
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byte[] inputArray = "Testing String".getBytes();
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CustomMultipartFile customMultipartFile = new CustomMultipartFile(inputArray);
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Assertions.assertEquals(inputArray.length, customMultipartFile.getSize());
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}
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@Test
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void whenProvidingByteArray_thenMockMultipartFileCreated() throws IOException {
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byte[] inputArray = "Test String".getBytes();
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MockMultipartFile mockMultipartFile = new MockMultipartFile("tempFileName", inputArray);
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Assertions.assertFalse(mockMultipartFile.isEmpty());
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Assertions.assertArrayEquals(inputArray, mockMultipartFile.getBytes());
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Assertions.assertEquals(inputArray.length, mockMultipartFile.getSize());
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}
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}

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