Method toUpper

common/src/main/java/pro/tools/data/text/ToolStr.java:237–243

变全大写 @param s @return

(String s)

     * @return
     */
    public static String toUpper(String s) {
        if (isBlank(s)) {
            return "";
        }

        return s.toUpperCase();
    }

    /**
     * 变全小写