I want to format some numbers in our jsp pages.
first i define some resources in my porpertiesformat.number.with2Decimal={0,number,#0.00}
......
Question1:
i want to know what is the ‘#’ and '0' means?
0.00,#0.00,##.00,###0.00
who can tell me the differences between them? thanks!
Question2:
if i define a BigDecimal type in my action
BigDecimal number1;
Then my page should using a format to show this value,1.if number1=null then show -NIL-
2.if number1=0 then show -NIL-
3.if number1>0 then show 1.00,3434.98 .....
please ignore number<0
Question3:
change number1 to a String,1.if number1=null or empty or blank then show -NIL-
2.if number1=Hello then show Hello ....
could you give me help?
Here you go :
<s:property value="getText('{0,number,#,##0.00}',{profit})"/>
This is how I format numbers in my projects. You can use it with <s:if>
to attain what you require.
Question1: i want to know what is the ‘
#
’ and '0
' means?0.00
,#0.00
,##.00
,###0.00
who can tell me the differences between them? thanks!
0
means that a number must be printed, no matter if it exists#
means that a number must be printed if it exists, omitted otherwise.Example:
System.out.println("Assuming US Locale: " +
"',' as thousand separator, " +
"'.' as decimal separator ");
NumberFormat nf = new DecimalFormat("#,##0.0##");
System.out.println("\n==============================");
System.out.println("With Format (#,##0.0##) ");
System.out.println("------------------------------");
System.out.println("1234.0 = " + nf.format(1234.0));
System.out.println("123.4 = " + nf.format(123.4));
System.out.println("12.34 = " + nf.format(12.34));
System.out.println("1.234 = " + nf.format(1.234));
System.out.println("==============================");
nf = new DecimalFormat("#,000.000");
System.out.println("\n==============================");
System.out.println("With Format (#,000.000) ");
System.out.println("------------------------------");
System.out.println("1234.0 = " + nf.format(1234.0));
System.out.println("123.4 = " + nf.format(123.4));
System.out.println("12.34 = " + nf.format(12.34));
System.out.println("1.234 = " + nf.format(1.234));
System.out.println("==============================");
Running Example
Output:
Assuming US Locale: ',' as thousand separator, '.' as decimal separator) ============================== With Format (#,##0.0##) ------------------------------ 1234.0 = 1,234.0 123.4 = 123.4 12.34 = 12.34 1.234 = 1.234 ============================== ============================== With Format (#,000.000) ------------------------------ 1234.0 = 1,234.000 123.4 = 123.400 12.34 = 012.340 1.234 = 001.234 ==============================
In Struts2, you can apply this kind of format with the getText()
function from ActionSupport
.
P.S: Question 2 and 3 are trivial (and messy).
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