字符串处理：去除不支持的字符 + 字符编码转换 + 去除不支持的字符 + 字符编码转换 + 数组转换成字符串 + 格式转换

 - 去除不支持的字符

StringBuffer buffer = new StringBuffer(value);
        boolean contains = false;      
        for (int i = 0; i < unsupportedCharacterList.size(); i++) {
            String unsupportStr = (String) unsupportedCharacterList.get(i);
            int beginIdx = buffer.toString().indexOf(unsupportStr);
            while (beginIdx >= 0) {
                contains = true;
                buffer.delete(beginIdx, beginIdx + unsupportStr.length());
                beginIdx = buffer.toString().indexOf(unsupportStr);
            }
        }         
        Character.isLetter(str.charAt(i))

 

字符编码转换

value = (param == null)?"":new String(param.getBytes("ISO8859_1") ,getChineseEncoding());//MS950

 数组转换成字符串

 private String arrayToString(String[] strings) {
        if (strings == null) {
            return null;
        }
        StringBuffer buffer = new StringBuffer();
        buffer.append('[');
        for (int i = 0; i < strings.length; i++) {
            buffer.append(i);
            buffer.append('=');
            buffer.append(strings[i]);   
            if ((i + 1) < strings.length) {buffer.append(','); }
        }   
        buffer.append(']');        
        return buffer.toString();
    }

 格式转换

   // ----------------------------------------------------------------------
    public static SimpleDateFormat myDateFormatter = new SimpleDateFormat("MMM-yyyy");
    // DecimalFormat
    public static DecimalFormat integerFormat = new DecimalFormat("###,##0");
    f.format((d.doubleValue())    
     public static String formatCurrency(double amount){
      if (amount != 0) {
	      NumberFormat nf = NumberFormat.getCurrencyInstance();
	      DecimalFormat df = (DecimalFormat)nf;
	      df.setMinimumFractionDigits(2);
	      df.setMaximumFractionDigits(2);
	      df.setDecimalSeparatorAlwaysShown(true);
	      String pattern = "###,##0.00";
	      df.applyPattern(pattern);
        if (amount > 0) {
	        return df.format(amount);
        } else {
	        return "["+df.format(Math.abs(amount))+"]";
        }
      } else {
        return "--";
      }
    }    
    public static String formatCurrency(double amount, int digit){
      if (amount != 0) {
	      NumberFormat nf = NumberFormat.getCurrencyInstance();
	      DecimalFormat df = (DecimalFormat)nf;
	      df.setMinimumFractionDigits(digit);
	      df.setMaximumFractionDigits(digit);
	      df.setDecimalSeparatorAlwaysShown(true);
        String pattern = "###,##0.00";
        if (digit==3) {
          pattern = "###,##0.000";
        } else if (digit==4) {
          pattern = "###,##0.0000";
        }
	      df.applyPattern(pattern);
        if (amount > 0) {
	        return df.format(amount);
        } else {
	        return "["+df.format(Math.abs(amount))+"]";
        }
      } else {
        return "--";
      }
    }