org.apache.commons.beanutils.converters.BigDecimalConverter Java Examples

/**
 * Returns a BigInteger representation of the field or a default value in case if the field cannot
 * be converted to a BigInteger.
 * @param def the default value to be returned if an error occurs converting the field
 * @return a BigInteger representation of the field
 */
public BigInteger getBigInteger(BigInteger def) {
    BigDecimal result = new BigDecimalConverter(null).convert(BigDecimal.class, prepareValue());
    return result != null
            ? result.multiply(BigDecimal.valueOf(getMultiplier()))
                    .add(BigDecimal.valueOf(getOffset())).setScale(0, RoundingMode.HALF_UP).toBigInteger()
            : def;
}
 

/**
 * Returns a BigDecimal representation of the field or a default value in case if the field cannot
 * be converted to a BigDecimal.
 * @param def the default value to be returned if an error occurs converting the field
 * @return a BigDecimal representation of the field
 */
public BigDecimal getBigDecimal(BigDecimal def) {
    BigDecimal result = new BigDecimalConverter(null).convert(BigDecimal.class, prepareValue());
    return result != null
            ? result.multiply(BigDecimal.valueOf(getMultiplier()))
            : def;
}
 

public void initialize(ConfigurableApplicationContext applicationContext) {
    logger.debug("Context is initialized");
    BeanUtilsBean.getInstance().
            getConvertUtils().register(new LongConverter(null),
            Long.class);
    BeanUtilsBean.getInstance()
            .getConvertUtils().register(new BigDecimalConverter(null),
            BigDecimal.class);
}
 

/**
 * Register standard default null.
 * 
 * @see ConvertUtilsBean#registerPrimitives(boolean) registerPrimitives(boolean throwException)
 * @see ConvertUtilsBean#registerStandard(boolean,boolean) registerStandard(boolean throwException, boolean defaultNull)
 * @see ConvertUtilsBean#registerOther(boolean) registerOther(boolean throwException)
 * @see ConvertUtilsBean#registerArrays(boolean,int) registerArrays(boolean throwException, int defaultArraySize)
 * @see ConvertUtilsBean#deregister(Class) ConvertUtilsBean.deregister(Class)
 * @since 1.11.2
 */
public static void registerStandardDefaultNull(){
    ConvertUtils.register(new BigDecimalConverter(null), BigDecimal.class);
    ConvertUtils.register(new BigIntegerConverter(null), BigInteger.class);
    ConvertUtils.register(new BooleanConverter(null), Boolean.class);
    ConvertUtils.register(new ByteConverter(null), Byte.class);
    ConvertUtils.register(new CharacterConverter(null), Character.class);
    ConvertUtils.register(new DoubleConverter(null), Double.class);
    ConvertUtils.register(new FloatConverter(null), Float.class);
    ConvertUtils.register(new IntegerConverter(null), Integer.class);
    ConvertUtils.register(new LongConverter(null), Long.class);
    ConvertUtils.register(new ShortConverter(null), Short.class);
    ConvertUtils.register(new StringConverter(null), String.class);
}
 

/**
    * <p>Initialize other global characteristics of the controller servlet.</p>
    * Overridden to remove the ConvertUtils.deregister() command that caused problems
    * with the concurrent data dictionary load.  (KULRNE-4405)
    *
    * @exception ServletException if we cannot initialize these resources
    */
   @Override
protected void initOther() throws ServletException {

       String value = null;
       value = getServletConfig().getInitParameter("config");
       if (value != null) {
           config = value;
       }

       // Backwards compatibility for form beans of Java wrapper classes
       // Set to true for strict Struts 1.0 compatibility
       value = getServletConfig().getInitParameter("convertNull");
       if ("true".equalsIgnoreCase(value)
           || "yes".equalsIgnoreCase(value)
           || "on".equalsIgnoreCase(value)
           || "y".equalsIgnoreCase(value)
           || "1".equalsIgnoreCase(value)) {

           convertNull = true;
       }

       if (convertNull) {
           ConvertUtils.register(new BigDecimalConverter(null), BigDecimal.class);
           ConvertUtils.register(new BigIntegerConverter(null), BigInteger.class);
           ConvertUtils.register(new BooleanConverter(null), Boolean.class);
           ConvertUtils.register(new ByteConverter(null), Byte.class);
           ConvertUtils.register(new CharacterConverter(null), Character.class);
           ConvertUtils.register(new DoubleConverter(null), Double.class);
           ConvertUtils.register(new FloatConverter(null), Float.class);
           ConvertUtils.register(new IntegerConverter(null), Integer.class);
           ConvertUtils.register(new LongConverter(null), Long.class);
           ConvertUtils.register(new ShortConverter(null), Short.class);
       }

       // KULRICE-8176: KFS Notes/Attachments Tab Functionality for Note Text Error - Visible/Special characters, spaces, or tabs
       parameterEncoding = getServletConfig().getInitParameter("PARAMETER_ENCODING");
   }
 

/**
 * 将 <code>toBeConvertedValue</code> 转换成 {@link java.math.BigDecimal}.
 * 
 * <h3>示例:</h3>
 * 
 * <blockquote>
 * 
 * <pre class="code">
 * ConvertUtil.toBigDecimal(null)                     = null
 * ConvertUtil.toBigDecimal("aaaa")                   = null
 * ConvertUtil.toBigDecimal(8)                        = BigDecimal.valueOf(8)
 * ConvertUtil.toBigDecimal("8")                      = BigDecimal.valueOf(8)
 * ConvertUtil.toBigDecimal(new BigDecimal("8"))      = BigDecimal.valueOf(8)
 * </pre>
 * 
 * <p>
 * 如果传入的参数 <code>toBeConvertedValue</code> 是 <b>数组</b>,那么<b>取第一个元素</b>进行转换,参见 {@link AbstractConverter#convertArray(Object)} L227:
 * </p>
 * 
 * <pre class="code">
 * ConvertUtil.toBigDecimal(new String[] { "1", "2", "3" }) = BigDecimal.valueOf(1)
 * </pre>
 * 
 * <p>
 * 如果传入的参数 <code>toBeConvertedValue</code> 是 <b>集合</b>,那么<b>取第一个元素</b>进行转换,参见 {@link AbstractConverter#convertArray(Object)} Line234:
 * </p>
 * 
 * <pre class="code">
 * ConvertUtil.toBigDecimal(toList("1", "2")) = BigDecimal.valueOf(1)
 * </pre>
 * 
 * </blockquote>
 * 
 * <h3>{@link java.lang.Double} 转成 {@link java.math.BigDecimal}注意点:</h3>
 * 
 * <blockquote>
 * 
 * <p>
 * <span style="color:red">推荐使用 {@link BigDecimal#valueOf(double)}</span>,不建议使用 <code>new BigDecimal(double)</code>,参见 JDK API<br>
 * </p>
 * 
 * <ul>
 * <li>{@code new BigDecimal(0.1) ====> 0.1000000000000000055511151231257827021181583404541015625}</li>
 * <li>{@code BigDecimal.valueOf(0.1) ====> 0.1}</li>
 * </ul>
 * 
 * <p>
 * 本方法底层调用的是 {@link NumberConverter#toNumber(Class, Class, Number)
 * NumberConverter#toNumber(Class, Class, Number)},正确的处理了 {@link java.lang.Double} 转成 {@link java.math.BigDecimal}
 * </p>
 * </blockquote>
 * 
 * @param toBeConvertedValue
 *            值
 * @return 如果 <code>toBeConvertedValue</code> 是null,返回 null<br>
 *         如果传入的参数 <code>toBeConvertedValue</code> 是 <b>数组</b>,那么<b>取第一个元素</b>进行转换<br>
 *         如果传入的参数 <code>toBeConvertedValue</code> 是 <b>集合</b>,那么<b>取第一个元素</b>进行转换<br>
 *         如果找不到转换器或者转换的时候出现了异常,返回 null
 * @see #convert(Object, Class)
 * @see org.apache.commons.beanutils.converters.NumberConverter#toNumber(Class, Class, Number)
 * @see org.apache.commons.beanutils.converters.BigDecimalConverter
 */
public static BigDecimal toBigDecimal(Object toBeConvertedValue){
    return new BigDecimalConverter(null).convert(BigDecimal.class, toBeConvertedValue);
}