refactoring and fixing deprecatations

Author: fvarrui

src/main/java/io/github/fvarrui/javapackager/maven/ResolveLicenseFromPOM.java

@@ -3,6 +3,8 @@
 import java.io.File;
 import java.io.IOException;
 import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.List;
 
@@ -36,10 +38,10 @@ protected File doApply(Packager packager) {
 			String urlStr = null; 
 			try {
 				urlStr = licenses.get(0).getUrl(); 
-				URL licenseUrl = new URL(urlStr);
+				URL licenseUrl = new URI(urlStr).toURL();
 				licenseFile = new File(assetsFolder, "LICENSE");
 				FileUtils.downloadFromUrl(licenseUrl, licenseFile);
-			} catch (MalformedURLException e) {
+			} catch (URISyntaxException | MalformedURLException e) {
 				Logger.error("Invalid license URL specified: " + urlStr);
 				licenseFile = null;
 			} catch (IOException e) {

src/main/java/io/github/fvarrui/javapackager/utils/CharsetUtil.java

@@ -22,7 +22,7 @@ public static Charset getCommandLineCharset(){
 
     private static Charset chcp() {
         try{
-            String result = CommandUtils.run("cmd /k chcp");	        	
+            String result = CommandUtils.run("cmd", "/k", "chcp");	        	
             String code = StringUtils.find("\\d+", result);
             Logger.debug("'chcp' code found: " + code);
             switch (code){

src/main/java/io/github/fvarrui/javapackager/utils/CommandUtils.java

@@ -77,7 +77,7 @@ public static ExecutionResult executeWithResult(File workingDirectory, String ex
 		return result;
 	}
 
-	public static String run(String command) throws IOException {
+	public static String run(String ... command) throws IOException {
     	Process p = Runtime.getRuntime().exec(command);
         BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
         String result = br.readLine();	        	

src/main/java/io/github/fvarrui/javapackager/utils/FileUtils.java

@@ -14,6 +14,8 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -324,9 +326,10 @@ public static void downloadFromUrl(URL url, File file) throws IOException {
 	 * @param url  URL to download
 	 * @param file File to copy the downloaded resource
 	 * @throws IOException Resource cannot be copied/downloaded
+	 * @throws URISyntaxException 
 	 */
-	public static void downloadFromUrl(String url, File file) throws IOException {
-		downloadFromUrl(new URL(url), file);
+	public static void downloadFromUrl(String url, File file) throws IOException, URISyntaxException {
+		downloadFromUrl(new URI(url).toURL(), file);
 	}
 
 	/**