JSP Syntax (4)--expression

js| syntax expressions

Contains an expression that conforms to the JSP syntax

JSP syntax

<%= expression%>

Example

<font color= "Blue" ><%= map.size ()%></font>
<b><%= numguess.gethint ()%></b>.

Describe

An expression element represents an expression that is defined in a scripting language, automatically converted to a string after it is run, and then inserted into the location of the JSP file to display the expression. Because the value of this expression has been converted to a string, you can insert the expression in one line of text (in the same way as an ASP).

When you use an expression in your JSP, keep the following points in mind:

You cannot use a semicolon (";") as the terminator of an expression. But the same expression used in scriptlet needs to end with a semicolon! View Scriptlet This expression element can include any expression that is valid in the Java Language specification.

Sometimes an expression can also be a property value of another JSP element. An expression can become complex, and it may consist of one or more expressions, the order of which is left to right.