Package org.h2.samples

Class FileFunctions

  • public class FileFunctions
extends java.lang.Object
    This sample application shows how to create a user defined function to read a file from the file system.

    • Constructor Summary

      Constructors 
      Constructor Description
      FileFunctions()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void main​(java.lang.String... args)
      This method is called when executing this sample application from the command line.
      static byte[] readFile​(java.lang.String fileName)
      Read a file into a byte array.
      static java.lang.String readTextFile​(java.lang.String fileName)
      Read a String from a file.
      static java.lang.String readTextFileWithEncoding​(java.lang.String fileName, java.lang.String encoding)
      Read a String from a file using the specified encoding.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • FileFunctions

        public FileFunctions()

    • Method Detail

      • main

        public static void main​(java.lang.String... args)
                 throws java.lang.Exception
        This method is called when executing this sample application from the command line.
        Parameters:
        args - the command line parameters
        Throws:
        java.lang.Exception - on failure

      • readTextFile

        public static java.lang.String readTextFile​(java.lang.String fileName)
                                     throws java.io.IOException
        Read a String from a file. The default encoding for this platform is used.
        Parameters:
        fileName - the file name
        Returns:
        the text
        Throws:
        java.io.IOException - on failure

      • readTextFileWithEncoding

        public static java.lang.String readTextFileWithEncoding​(java.lang.String fileName,
                                                        java.lang.String encoding)
                                                 throws java.io.IOException
        Read a String from a file using the specified encoding.
        Parameters:
        fileName - the file name
        encoding - the encoding
        Returns:
        the text
        Throws:
        java.io.IOException - on failure

      • readFile

        public static byte[] readFile​(java.lang.String fileName)
                       throws java.io.IOException
        Read a file into a byte array.
        Parameters:
        fileName - the file name
        Returns:
        the byte array
        Throws:
        java.io.IOException - on failure