Use waitfor for process java example
p = Runtime.getRuntime().exec(“your command”); StreamGobbler errorGobbler = new StreamGobbler(p.getErrorStream(), “ERROR”); StreamGobbler outputGobbler = new StreamGobbler(p.getInputStream(), “OUTPUT”); errorGobbler.start(); outputGobbler.start(); int exitCode = p.waitFor(); if(exitCode==0){ result = true; } else { String out = “”; […]
GZIPInputStream java example
If you have a gzip file and you want decompress it you can use this code : byte[] buffer = new byte[1024]; GZIPInputStream gzis = null; FileOutputStream out = null; try{ gzis = new GZIPInputStream(new FileInputStream(INPUT_GZIP_FILE)); out = new FileOutputStream(OUTPUT_FILE); int len; while ((len […]
SimpleDateFormat java example
Letter Date or Time Component Presentation Examples G Era designator Text AD y Year Year 1996; 96 Y Week year Year 2009; 09 M Month in year Month July; Jul; 07 w Week in year Number 27 W Week in month Number 2 D Day in year Number 189 d Day in month Number […]
Get file’s mime-type
To get file’s mime-type I usually use tika-app-1.3.jar library. You can download it here . In this way you can use the tika library to obtein the mime-type. public static String getMimeFromFialeTika(String nomeFile ) throws Exception { InputStream fileStream = null ; org.apache.tika.mime.MediaType mediaType = null ; try { File file = […]
Throwable to string java example
public static String getStackTrace(Throwable throwable) { Writer writer = new StringWriter(); PrintWriter printWriter = new PrintWriter(writer); throwable.printStackTrace(printWriter); return writer.toString(); }
Count wornds java example
public static int countWords(String str, String findStr){ int lastIndex = 0; int count =0; while(lastIndex != -1){ lastIndex = str.indexOf(findStr,lastIndex); if( lastIndex != -1){ count ++; } if (lastIndex==-1) break; lastIndex+=findStr.length(); } return count ; }
Move file java example
public static void moveFiles(File source, File dest) { InputStream inStream = null; OutputStream outStream = null; try{ inStream = new FileInputStream(source); outStream = new FileOutputStream(dest); byte[] buffer = new byte[1024]; int length; while ((length = inStream.read(buffer)) > 0){ outStream.write(buffer, 0, length); } inStream.close(); […]
Copy file java example
public static void copyFiles(File source, File dest) throws IOException { InputStream input = null; OutputStream output = null; try { input = new FileInputStream(source); output = new FileOutputStream(dest); byte[] buf = new byte[1024]; int bytesRead; while ((bytesRead = input.read(buf)) […]
Encode/Decode Base64 to byte[]
public static byte[] encode(byte[] b) throws Exception { ByteArrayOutputStream baos = new ByteArrayOutputStream(); OutputStream b64os = MimeUtility.encode(baos, “base64”); b64os.write(b); b64os.close(); return baos.toByteArray(); } public static byte[] decode(byte[] b) throws Exception { ByteArrayInputStream bais = […]
Get hash-256 from file into base64
String file_path = “your file from your file system “; System.out.println(“File to upload ” + file_path); FileInputStream fis = null; try { File file = new File(file_path); if (!file.exists() || file.length() == 0) { Utils.stampaLogE(“Conversion Hash SHA-256 . Bad input !!! ( File not found / File empty)…”); throw new RuntimeException(“Conversion […]
