StringUtils.isNumeric("")竟然返回true

 * 
     * StringUtils.isNumeric(null)   = false
     * StringUtils.isNumeric("")     = true
     * StringUtils.isNumeric("  ")   = false
     * StringUtils.isNumeric("123")  = true
     * StringUtils.isNumeric("12 3") = false
     * StringUtils.isNumeric("ab2c") = false
     * StringUtils.isNumeric("12-3") = false
     * StringUtils.isNumeric("12.3") = false
     * 
     *
     * @param str  the String to check, may be null
     * @return true if only contains digits, and is non-null
     */
    public static boolean isNumeric(String str) {
        if (str == null) {
            return false;
        }
        int sz = str.length();
        for (int i = 0; i < sz; i++) {
            if (Character.isDigit(str.charAt(i)) == false) {
                return false;
            }
        }
        return true;
    }

 

 

https://issues.apache.org/jira/browse/LANG-428

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3
• Fix Version/s: 3.0
• Component/s: lang.*
• Labels:

  None

3.0版本已经解决该问题

分类: JAVA