Package org.europa.together.utils

Class StringUtils

  • public final class StringUtils
extends Object
    Some useful Methods for String manipulation, Hash and UUID generation.

    • Method Detail

      • isEmpty

        public static boolean isEmpty​(String string)
        Test a String if is Empty or NULL. The test don't figure out when a Sting contains only non printable or whitespace characters.
        Parameters:
        string - as String
        Returns:
        true if the string is empty or null

      • hashToInt

        public static int hashToInt​(String hash)
        Convert a Hash String to an Integer. Takes each character of the hash string, convert them to his ASCII number as int and add the result to a sum.
        Parameters:
        hash - as String
        Returns:
        hash as integer

      • stringListBuilder

        public static List<String> stringListBuilder​(String... strings)
        Creates a List with Strings entries in a short way. Sample: List<String> list = new arrayList(); list.add("foo"); list.add("more");
        is reduced to stringListBuilder("foo", "more");
        Parameters:
        strings - as String
        Returns:
        a List of Strings

      • byteToString

        public static String byteToString​(byte[] bytes)
        Create a String from a given ByteArray. Each character get converted to his UTF-8 hexadecimal expression. e.g. '#' -> "23"
        Parameters:
        bytes - as byteArray
        Returns:
        bytes as String

      • concatString

        public static String concatString​(String... strings)
        Concatenate a list of Strings using StringBuilder.
        Parameters:
        strings - as String
        Returns:
        string as string

      • escapeXmlCharacters

        public static String escapeXmlCharacters​(String content)
        Escape (decode) in a String all special Characters for XML to thir equivalent representation. Characters: <, >, &, ', "
        This replacement extend the security of a web Application against XSS and SQL Injections for user modified content.
        Parameters:
        content - as String
        Returns:
        escapedHtml as String

      • generateLoremIpsum

        public static String generateLoremIpsum​(int chars)
        Produce a lorem ipsum Text with 4 paragraphs and 2100 characters. The parameter chars reduce the output to the given count of characters. To get the whole text set chars to 0.
        Parameters:
        chars - as int
        Returns:
        out as String

      • generateStringOfLength

        public static String generateStringOfLength​(int length)
        Creates a String of specified length with the content of numbers. generateStringOfLength(13) = [0123456789012]
        Parameters:
        length - as int
        Returns:
        string as String

      • generateUUID

        public static String generateUUID()
        Generates an universally unique identifier (UUID). The UUID is a type 4 (pseudo randomly generated) UUID. The UUID is generated using a cryptographically strong pseudo random number generator.
        Returns:
        UUID as String

      • shrink

        public static String shrink​(String content)
        Shrink XML, JS and CSS Files to reduce the payload for network traffic. The shrinker removes comments and unnecessary whitespace and line breaks.
        Parameters:
        content - as String
        Returns:
        shrink content as String

      • skipBom

        public static String skipBom​(String content)
        Detect and remove the (BOM) Byte Order Mark from a string.
        Parameters:
        content - as String
        Returns:
        utf-8 String