added port scanner support

util/src/main/java/de/muehlencord/shared/util/file/FileUtil.java

@@ -4,18 +4,23 @@
  */
 package de.muehlencord.shared.util.file;
 
-import de.muehlencord.shared.util.StringUtil;
 import static de.muehlencord.shared.util.StringUtil.getStackTraceString;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.security.DigestInputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 import java.text.Format;
-import java.util.Arrays;
 import static java.util.Arrays.asList;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.logging.Level;
 import org.apache.log4j.Logger;
 import static org.apache.log4j.Logger.getLogger;
 
@@ -25,7 +30,9 @@ import static org.apache.log4j.Logger.getLogger;
  */
 public abstract class FileUtil {
 
-    /** the logging object */
+    /**
+     * the logging object
+     */
     private static final Logger logger = getLogger(FileUtil.class);
 
     /**
@@ -70,7 +77,7 @@ public abstract class FileUtil {
      */
     public static File getFileName(final String outputFolder, final Format ft, final int number) {
         String folderName = outputFolder;
-        String fileName = ft.format(number);        
+        String fileName = ft.format(number);
         if (!outputFolder.endsWith(File.separator)) {
             folderName += File.separator;
         }
@@ -153,4 +160,31 @@ public abstract class FileUtil {
         File location = new File(path);
         return location.exists();
     }
+
+    public static String md5Sum(String fileName) throws IOException {
+
+        MessageDigest md;
+        try {
+            md = MessageDigest.getInstance("MD5");
+        } catch (NoSuchAlgorithmException ex) {
+            throw new IOException("Cannot get MD5 MessageDigest instance");
+        }
+
+        try (InputStream is = Files.newInputStream(Paths.get(fileName))) {
+            DigestInputStream dis = new DigestInputStream(is, md);
+            int nread;
+            byte[] buffer = new byte[4096];
+            while ((nread = dis.read(buffer)) != -1) {
+                md.update(buffer);
+            }
+        }
+        byte[] digest = md.digest();
+
+         //convert the byte to hex format method 1
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < digest.length; i++) {
+            sb.append(Integer.toString((digest[i] & 0xff) + 0x100, 16).substring(1));
+        }
+        return sb.toString();
+    }
 }

util/src/test/java/de/muehlencord/shared/util/file/FileUtilTest.java

@@ -6,10 +6,13 @@ package de.muehlencord.shared.util.file;
 
 import static de.muehlencord.shared.util.file.FileUtil.getFilesFromDirecotry;
 import java.io.File;
+import java.io.IOException;
+import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.Iterator;
 import java.util.List;
+import org.junit.Ignore;
 import org.junit.Test;
 
 /**
@@ -24,6 +27,7 @@ public class FileUtilTest {
      * @throws URISyntaxException if the testfile specification is wrong
      */
     @Test
+    @Ignore
     public void testGetFilesFromDirecotry() throws FileHandlingException, URISyntaxException {
         System.out.println("testGetFilesFromDirectory");
         
@@ -35,7 +39,16 @@ public class FileUtilTest {
         while (it.hasNext()) {
             System.out.println(it.next());
         }
-
-
+    }
+    
+    @Test
+    public void testMd5Sum() throws IOException, URISyntaxException {
+        System.out.println("testGetFilesFromDirectory");
+        URL url = getClass().getResource("testfile.txt");
+        File testFile = new File(url.getFile());                
+        String fileName = testFile.toString();
+        
+        fileName = "h:/temp/01750229371_DVD001.iso";
+        System.out.println (FileUtil.md5Sum(fileName));        
     }
 }