29,java 数字类校验

public class NumberHelper {
    /*
     *是否数字
     */
    public final static boolean isNumeric(String s) {
        if (s != null && !"".equals(s.trim()))
            return s.matches("^[0-9]*$");
        else
            return false;
    }
    /**
     * 生成整形随机数
     * @param min
     * @param max
     */
    public static int intRandom(int min, int max){
        max += 1;
        int result = min + ((int)(new Random().nextFloat() * (max - min)));
        return result;
    }
    
    /**
     * 字符串转换成INT
     * @param str
     * @param defaultVal
     * @return
     */
    public static Integer stringToInt(String str, Integer defaultVal){
        Double d = stringToDouble(str, 0d);
        if(d.equals(0d)){
            return defaultVal;
        }       
            return d.intValue();
    }
    /**
     * 字符串转长整形
     * @param str
     * @param defaultVal
     * @return
     */
    public static Long stringToLong(String str, Long defaultVal){
        Double d = stringToDouble(str, 0d);
        if(d.equals(0d)){
            return defaultVal;
        }       
        return d.longValue();
    
    /**
     * 格式化ＤＯ
     * @param val
     * @param decimalN
     * @return
     */
    public static Double formatDouble(Double val, int decimalN){
        if(val==null){
            return 0d;
        }
        BigDecimal b = new BigDecimal(Double.toString(val));
            return b.setScale(decimalN, BigDecimal.ROUND_HALF_UP).doubleValue();
    }

public static Double stringToDouble(String odds, double d) {
        if(odds == null){
            return d;
        }
        try{
            return Double.parseDouble(odds);
        }catch(Exception ex){
            return d;
        }
    }

    public static Float stringToFloat(String odds, float f) {
        if(odds == null){
            return f;
        }
        try{
            return Float.parseFloat(odds);
        }catch(Exception ex){
            return f;
        }
    }
}