Replaces characters that are illegal in filenames to underscores - Java java.io

Java examples for java.io:File Name

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Description

Replaces characters that are illegal in filenames to underscores

Demo Code

public class Main {

  public static void main(String[] argv) {
    String path = "$%^&*()java2s.com";
    System.out.println(safePathString(path));
  }/*from  ww  w  .j  a va2s.c  o m*/

  /**
   * Replaces characters that are illegal in filenames to underscores ("_").
   * <p>
   * 
   * @param path
   *          A string to be used in a file path or file name
   * @return The input string with illegal characters converted to an underscore.
   *         The following characters are replaced: : % / \ ; $ &gt; &lt; * . ? "
   *         | ! @
   */
  public static String safePathString(String path) {
    if (path == null)
      return "null";

    StringBuilder b = new StringBuilder();

    int cnt = path.length();
    for (int i = 0; i < cnt; i++) {
      char c = path.charAt(i);
      if (c == ':' || c == '%' || c == '/' || c == '\\' || c == ';' || c == '$' || c == '>' || c == '<' || c == '*'
          || c == '.' || c == '?' || c == '"' || c == '|' || c == '!' || c == '@') {
        b.append('_');
      } else {
        b.append((char) c);
      }
    }

    return b.toString();
  }

}

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