How does the Jsp Expressions works ? What happens at the back?

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How does the Jsp Expressions works ? What happens at the
back?

Question Posted / vijay bhaskar

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How does the Jsp Expressions works ? What happens at the back?..

Answer / guest

jsp expressions are evaluated at the run time,
jsp compiler evaluates the expressions at the run time.

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How does the Jsp Expressions works ? What happens at the back?..

Answer / nowsheen tariq

jsp expressions is a normal java expression , when we write
the jsp expression in our jsp page like
<%=some expression%> then in the servlet ie generated by
jsp compiler the jsp expression will be placed without" "
in out.printmethod.

for example :

<%
int i=10,j=20,k=30;%>
k----> <%=k%>

in the servlet equivalent to above jsp page

out.print("k---->");
out.print(k);

like that at the back the jsp expression will be placed in
the out.print()without " " so that the value of the
expresssion will be evaluated and printed.

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1 No

How does the Jsp Expressions works ? What happens at the back?..

Answer / rajini

An expression tag contains a scripting language expression
that is evaluated, converted to a String, and inserted
where the expression appears in the JSP file. Because the
value of an expression is converted to a String, you can
use an expression within text in a JSP file. Like
<%= someexpression %>
<%= (new java.util.Date()).toLocaleString() %>
You cannot use a semicolon to end an expression

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How does the Jsp Expressions works ? What happens at the back?..

Answer / pratique suhane

ex : <%=a%>

in background : out.println(a);

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How does the Jsp Expressions works ? What happens at the back?..

Answer / vinoth mca

JSP expressions are a quick way to insert data into an HTML page. In Math, an expression is a way to represent a single value different ways. I could represent the number 6 with the expressions, (3+3) or (2*3). In JSP, the idea is the same. But instead of coming up with a mathimatical value, the result of an expression is converted to a string it can be displayed as part of an HTML Page.

An expression is enclosed in these tages: <%= %> For example, To add 2+2 and display the result, you would enter the following:

<%= 2+2 %>

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