StringUtils.isNumeric("")竟然返回true

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 * <pre>     * 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     * </pre>     *     * @param str  the String to check, may be null     * @return <code>true</code> 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

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