BAEL-5052-simulate-touch-command-in-java (#11560)

* BAEL-5052-simulate-touch-command-in-java

* refactor

Co-authored-by: tienvn4 <tienvn4@ghtk.co>

core-java-modules/core-java-io-4/src/main/java/com/baeldung/simulation/touch/command/Simulator.java

@@ -0,0 +1,49 @@
+package com.baeldung.simulation.touch.command;
+
+import org.apache.commons.io.FileUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.attribute.FileTime;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+
+public class Simulator {
+
+    public static void touch(String path, String... args) throws IOException, ParseException {
+        File file = new File(path);
+        if (!file.exists()) {
+            file.createNewFile();
+            if (args.length == 0) {
+                return;
+            }
+        }
+        long timeMillis = args.length < 2 ? System.currentTimeMillis() : new SimpleDateFormat("dd-MM-yyyy hh:mm:ss").parse(args[1]).getTime();
+        if (args.length > 0) {
+            // change access time only
+            if ("a".equals(args[0])) {
+                FileTime accessFileTime = FileTime.fromMillis(timeMillis);
+                Files.setAttribute(file.toPath(), "lastAccessTime", accessFileTime);
+                return;
+            }
+            // change modification time only
+            if ("m".equals(args[0])) {
+                file.setLastModified(timeMillis);
+                return;
+            }
+        }
+        // other cases will change both
+        FileTime accessFileTime = FileTime.fromMillis(timeMillis);
+        Files.setAttribute(file.toPath(), "lastAccessTime", accessFileTime);
+        file.setLastModified(timeMillis);
+    }
+
+    public static void touchWithApacheCommons(String path) throws IOException {
+        FileUtils.touch(new File(path));
+    }
+
+    public static void main(String[] args) throws IOException, ParseException {
+        touch("test.txt");
+    }
+}