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

@Override
public int[][][] convert(String str) {
    if (str == null || str.isEmpty()) {
        return new int[0][][];
    }
    // 格式 1,2;3,4|5,6  =>  [[[1, 2], [3, 4]], [[5,6]]]
    IntegerConverter integerConverter = new IntegerConverter(); // 基本类型
    ArrayConverter arrayConverter1 = new ArrayConverter(int[].class, integerConverter); // 一维数组 默认使用逗号分割

    ArrayConverter arrayConverter2 = new ArrayConverter(int[][].class, arrayConverter1); // 二维数组
    arrayConverter2.setDelimiter(';'); // 使用分号分割
    arrayConverter2.setAllowedChars(new char[]{','});


    ArrayConverter arrayConverter3 = new ArrayConverter(int[][].class, arrayConverter2); // 二维数组
    arrayConverter3.setDelimiter('|'); // 使用竖线分割
    arrayConverter3.setAllowedChars(new char[]{';', ','});

    return arrayConverter3.convert(int[][][].class, str);
}
 

@Override
public int[][][] convert(String str) {
    if (str == null || str.isEmpty()) {
        return new int[0][][];
    }
    // 格式 1,2;3,4|5,6  =>  [[[1, 2], [3, 4]], [[5,6]]]
    // 基本类型
    IntegerConverter integerConverter = new IntegerConverter();
    // 一维数组 默认使用逗号分割
    ArrayConverter arrayConverter1 = new ArrayConverter(int[].class, integerConverter);

    // 二维数组
    ArrayConverter arrayConverter2 = new ArrayConverter(int[][].class, arrayConverter1);
    // 使用分号分割
    arrayConverter2.setDelimiter(';');
    arrayConverter2.setAllowedChars(new char[]{','});

    // 二维数组
    ArrayConverter arrayConverter3 = new ArrayConverter(int[][].class, arrayConverter2);
    // 使用竖线分割
    arrayConverter3.setDelimiter('|');
    arrayConverter3.setAllowedChars(new char[]{';', ','});

    return arrayConverter3.convert(int[][][].class, str);
}
 

public @Test void testBadData()
{
    Data datum = new Data();
    // a fresh datum should be invalid
    assertInvalid(datum);
    // setting a key is not enough to be valid
    datum.setKey("test");
    assertInvalid(datum);

    // set type to number value to a non-number
    datum.setValue("true");
    datum.setType("number");
    assertInvalid(datum);

    // should fail to convert a decimal string to an integer
    datum.setValue("0.1");
    datum.convertWith(new IntegerConverter());
    assertInvalid(datum);
}
 

/**
 * Returns an Integer representation of the field or a default value in case if the field cannot
 * be converted to an Integer.
 * @param def the default value to be returned if an error occurs converting the field
 * @return an Integer representation of the field
 */
public Integer getInteger(Integer def) {
    Integer result = new IntegerConverter(null).convert(Integer.class, prepareValue());
    if (result != null) {
        double multiplier = getMultiplier();
        double offset = getOffset();
        if (multiplier != 1.0 || offset != 0.0) {
            return (int) Math.round(result * multiplier + offset);
        } else {
            return result;
        }
    } else {
        return def;
    }
}
 

private AbstractConverter getConverter() {
    FieldFormat fieldFormat = field.getFormat();
    int size = fieldFormat.getSize();
    switch (fieldFormat.getType()) {
        case BOOLEAN: return new BooleanConverter();
        case UINT:
            if (size < 32) {
                return new IntegerConverter();
            } else if (size < 64) {
                return new LongConverter();
            } else {
                return new BigIntegerConverter();
            }
        case SINT:
            if (size <= 32) {
                return new IntegerConverter();
            } else if (size <= 64) {
                return new LongConverter();
            } else {
                return new BigIntegerConverter();
            }
        case FLOAT_IEE754:
        case FLOAT_IEE11073: return size <= 32 ? new FloatConverter() : new DoubleConverter();
        case UTF8S:
        case UTF16S: return new StringConverter();
        default:
            throw new IllegalStateException("Unsupported field format: " + fieldFormat.getType());
    }
}
 

/**
 * 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 Integer}类型,如果转换不了返回默认值 <code>defaultValue</code>.
 * 
 * <h3>示例:</h3>
 * 
 * <blockquote>
 * 
 * <pre class="code">
 * ConvertUtil.toInteger(null,null)               = null
 * ConvertUtil.toInteger(null,1)                  = 1
 * ConvertUtil.toInteger("aaaa",1)                = 1
 * ConvertUtil.toInteger(8L,1)                    = 8
 * ConvertUtil.toInteger("8",1)                   = 8
 * ConvertUtil.toInteger(new BigDecimal("8"),1)   = 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.toInteger(new String[] { "1", "2", "3" }, 8) = 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.toInteger(toList("1", "2"), 8) = 1
 * </pre>
 * 
 * </blockquote>
 * 
 * <p>
 * 该方法非常适用 获取request请求的分页参数
 * </p>
 * 
 * <h3>示例:</h3>
 * 
 * <blockquote>
 * 
 * 原来的写法:
 * 
 * <pre class="code">
 * 
 * public static Integer getCurrentPageNo(HttpServletRequest request,String pageParamName){
 *     String pageNoString = RequestUtil.getParameter(request, pageParamName);
 *     try{
 *         int pageNo = Integer.parseInt(pageNoString);
 *         return pageNo;
 *     }catch (Exception e){
 *         LOGGER.error(e.getClass().getName(), e);
 *     }
 *     return 1; <span style="color:green">// 不带这个参数或者转换异常返回1</span>
 * }
 * 
 * </pre>
 * 
 * 现在可以更改成:
 * 
 * <pre class="code">
 * 
 * public static Integer getCurrentPageNo(HttpServletRequest request,String pageParamName){
 *     String pageNoString = RequestUtil.getParameter(request, pageParamName);
 *     return ConvertUtil.toInteger(pageNoString, 1);
 * }
 * </pre>
 * 
 * </blockquote>
 *
 * @param toBeConvertedValue
 *            值
 * @param defaultValue
 *            默认值
 * @return 如果 <code>toBeConvertedValue</code> 是null,返回 <code>defaultValue</code> <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 <code>defaultValue</code>
 * @see org.apache.commons.beanutils.converters.IntegerConverter
 * @see org.apache.commons.lang3.ObjectUtils#defaultIfNull(Object, Object)
 * @since 1.6.1
 */
public static Integer toInteger(Object toBeConvertedValue,Integer defaultValue){
    return new IntegerConverter(defaultValue).convert(Integer.class, toBeConvertedValue);
}