[BAEL-8567] Add support for Downloading file using Apache HttpClient (#17641)

* [BAEL-8567] Add support for Downloading file using Apache HttpClient

* [BAEL-8567] Update maven dependency

---------

Co-authored-by: rajatgarg <rajatgarg@adobe.com>

Author: rajat-garg

core-java-modules/core-java-networking-2/pom.xml

@@ -45,13 +45,19 @@
             <version>${greenmail.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.httpcomponents.client5</groupId>
+            <artifactId>httpclient5</artifactId>
+            <version>${apache.httpclient.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
         <finalName>core-java-networking-2</finalName>
     </build>
 
     <properties>
+        <apache.httpclient.version>5.3.1</apache.httpclient.version>
         <angus.mail.version>2.0.1</angus.mail.version>
         <async-http-client.version>2.4.5</async-http-client.version>
         <jakarta.bind.version>2.3.3</jakarta.bind.version>

core-java-modules/core-java-networking-2/src/main/java/com/baeldung/download/FileDownload.java

@@ -1,6 +1,11 @@
 package com.baeldung.download;
 
 import org.apache.commons.io.FileUtils;
+import org.apache.hc.client5.http.classic.methods.HttpGet;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.HttpEntity;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
 import org.asynchttpclient.*;
 
 import java.io.*;
@@ -89,4 +94,28 @@ public FileOutputStream onCompleted(Response response) throws Exception {
         client.close();
     }
 
+    public static void downloadWithApacheHttpClient(String url, String localFileName) throws IOException {
+        try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+            HttpGet httpGet = new HttpGet(url);
+            httpClient.execute(httpGet, classicHttpResponse -> {
+                int code = classicHttpResponse.getCode();
+                if (code == 200) {
+                    HttpEntity entity = classicHttpResponse.getEntity();
+                    if (entity != null) {
+                        try (InputStream inputStream = entity.getContent();
+                        FileOutputStream fileOutputStream = new FileOutputStream(localFileName)) {
+                            byte[] dataBuffer = new byte[1024];
+                            int bytesRead;
+                            while((bytesRead = inputStream.read(dataBuffer)) != -1) {
+                                fileOutputStream.write(dataBuffer, 0, bytesRead);
+                            }
+                        }
+                    }
+                    EntityUtils.consume(entity);
+                }
+                return classicHttpResponse;
+            });
+        }
+    }
+
 }

core-java-modules/core-java-networking-2/src/test/java/com/baeldung/download/FileDownloadIntegrationTest.java

@@ -56,6 +56,12 @@ public void givenApacheCommonsIO_whenDownloadingFile_thenDownloadShouldBeCorrect
         FileDownload.downloadWithApacheCommons(FILE_URL, FILE_NAME);
         assertTrue(checkMd5Hash(FILE_NAME));
     }
+
+    @Test
+    public void giveApacheHttpClient_whenDownloadingFile_thenDownloadShouldBeCorrect() throws IOException, NoSuchAlgorithmException {
+        FileDownload.downloadWithApacheHttpClient(FILE_URL, FILE_NAME);
+        assertTrue(checkMd5Hash(FILE_NAME));
+    }
 
     @Test
     public void givenJavaIO_whenDownloadingFileStops_thenDownloadShouldBeResumedCorrectly() throws NoSuchAlgorithmException, IOException, URISyntaxException {