com.hangum.tadpole.commons.util.NumberFormatUtils.java Source code

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Here is the source code for com.hangum.tadpole.commons.util.NumberFormatUtils.java

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/*******************************************************************************
 * Copyright (c) 2013 hangum.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     hangum - initial API and implementation
 ******************************************************************************/
package com.hangum.tadpole.commons.util;

import java.text.DecimalFormat;

import org.apache.commons.lang.StringUtils;

/**
 * number format util
 * 
 * @author hangum
 *
 */
public class NumberFormatUtils {

    /**
     * ?? .
     * @param value
     * @return
     */
    public static String commaFormat(String value) {
        if (null == value)
            return "";

        try {
            return commaFormat(new Double(value));
        } catch (NumberFormatException nfe) {
            return value;
        }
    }

    /**
     * , ??.
     * @param value
     * @return
     */
    public static String commaFormat(double value) {
        //      String tmpVal = String.format("%.2f", value);
        DecimalFormat df = new DecimalFormat("#,###.##");
        String tmpVal = df.format(value).toString();

        if (-1 == StringUtils.indexOf(tmpVal, ".00")) {
            return tmpVal;
        } else {
            return StringUtils.replaceOnce(tmpVal, ".00", "");
        }
    }

    /**
     * kb, mb 
     * 
     * @param value
     * @return
     */
    public static String kbMbFormat(double value) {
        // bytes
        if (value < 1024) {
            double val = value;

            return commaFormat(val) + " bytes";
            // kb
        } else if (value < 1024 * 1024) {
            double val = value / (1024);
            return commaFormat(val) + " KB";
            // mb
        } else {
            double val = value / (1024 * 1024);
            return commaFormat(val) + " MB";
        }
    }
}