Class StringFns


  • public class StringFns
    extends java.lang.Object
    Functions to manipulate strings in EL.
    Author:
    tomyeh
    • Constructor Summary

      Constructors 
      Constructor Description
      StringFns()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String cat​(java.lang.Object o1, java.lang.Object o2)
      Concatenates two objects.
      static java.lang.String cat3​(java.lang.Object o1, java.lang.Object o2, java.lang.Object o3)
      Concatenates three objects.
      static java.lang.String cat4​(java.lang.Object o1, java.lang.Object o2, java.lang.Object o3, java.lang.Object o4)
      Concatenates four objects.
      static java.lang.String cat5​(java.lang.Object o1, java.lang.Object o2, java.lang.Object o3, java.lang.Object o4, java.lang.Object o5)
      Concatenates five objects.
      static java.lang.String eatQuot​(java.lang.String s)
      Eliminates single and double quotations to avoid JavaScript injection.
      static boolean endsWith​(java.lang.String s1, java.lang.String s2)
      Tests if this string ends with the specified suffix.
      static java.lang.String join​(java.lang.Object[] ss, java.lang.String separator)
      Joins an array of string.
      static java.lang.String replace​(java.lang.String src, java.lang.String from, java.lang.String to)
      Replaces all occurrences of 'from' in 'src' with 'to'
      static java.lang.String[] split​(java.lang.String s, java.lang.String separator)
      Splits a string.
      static boolean startsWith​(java.lang.String s1, java.lang.String s2)
      Tests if this string starts with the specified prefix.
      static java.lang.String substring​(java.lang.String s, int from, int to)
      Returns a new string that is a substring of this string.
      static java.lang.String toLowerCase​(java.lang.String s)
      Converts all of the characters in this String to upper case using the rules of the current Locale.
      static java.lang.String toUpperCase​(java.lang.String s)
      Converts all of the characters in this String to upper case using the rules of the current Locale.
      static java.lang.String trim​(java.lang.String s)
      Returns a copy of the string, with leading and trailing whitespace omitted.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • StringFns

        public StringFns()
    • Method Detail

      • cat

        public static java.lang.String cat​(java.lang.Object o1,
                                           java.lang.Object o2)
        Concatenates two objects. Note: null is considered as empty.
      • cat3

        public static java.lang.String cat3​(java.lang.Object o1,
                                            java.lang.Object o2,
                                            java.lang.Object o3)
        Concatenates three objects. Note: null is considered as empty.
      • cat4

        public static java.lang.String cat4​(java.lang.Object o1,
                                            java.lang.Object o2,
                                            java.lang.Object o3,
                                            java.lang.Object o4)
        Concatenates four objects. Note: null is considered as empty.
      • cat5

        public static java.lang.String cat5​(java.lang.Object o1,
                                            java.lang.Object o2,
                                            java.lang.Object o3,
                                            java.lang.Object o4,
                                            java.lang.Object o5)
        Concatenates five objects. Note: null is considered as empty.
      • toLowerCase

        public static java.lang.String toLowerCase​(java.lang.String s)
        Converts all of the characters in this String to upper case using the rules of the current Locale.
        Since:
        5.0.7
        See Also:
        Locales.getCurrent()
      • toUpperCase

        public static java.lang.String toUpperCase​(java.lang.String s)
        Converts all of the characters in this String to upper case using the rules of the current Locale.
        Since:
        5.0.7
        See Also:
        Locales.getCurrent()
      • trim

        public static java.lang.String trim​(java.lang.String s)
        Returns a copy of the string, with leading and trailing whitespace omitted.
        Since:
        5.0.7
      • split

        public static java.lang.String[] split​(java.lang.String s,
                                               java.lang.String separator)
        Splits a string.
        Since:
        5.0.7
      • join

        public static java.lang.String join​(java.lang.Object[] ss,
                                            java.lang.String separator)
        Joins an array of string. since 5.0.7
      • startsWith

        public static boolean startsWith​(java.lang.String s1,
                                         java.lang.String s2)
        Tests if this string starts with the specified prefix.
        Since:
        5.0.7
      • endsWith

        public static boolean endsWith​(java.lang.String s1,
                                       java.lang.String s2)
        Tests if this string ends with the specified suffix.
        Since:
        5.0.7
      • substring

        public static java.lang.String substring​(java.lang.String s,
                                                 int from,
                                                 int to)
        Returns a new string that is a substring of this string.
        Since:
        5.0.7
      • replace

        public static java.lang.String replace​(java.lang.String src,
                                               java.lang.String from,
                                               java.lang.String to)
        Replaces all occurrences of 'from' in 'src' with 'to'
      • eatQuot

        public static java.lang.String eatQuot​(java.lang.String s)
        Eliminates single and double quotations to avoid JavaScript injection. It eliminates all quotations. In other words, the specified string shall NOT contain any quotations.

        It is used to avoid JavaScript injection. For example, in DSP or JSP pages, the following codes is better to escape with this method.

        Since:
        3.5.2