JSP syntax (5)--scriptlet

js| Syntax Scriptlet

Contains a valid program segment.

JSP syntax

<% Code Fragment%>

Example

<%
String name = NULL;
if (Request.getparameter ("name") = = null) {
%>
<%@ include file= "error.html"%>
<%
} else {
Foo.setname (Request.getparameter ("name"));
if (Foo.getname (). Equalsignorecase ("Integra"))
Name = "Acura";
if (Name.equalsignorecase ("Acura")) {
%>

Describe

A scriptlet can contain multiple JSP statements, methods, variables, expressions

Because of scriptlet, we can do the following things:

Declare the variable or method (reference declaration) that will be used.
Write a JSP expression (a reference expression).
Use any suppressed objects and any objects declared with <jsp:useBean>
Write JSP statements (if you are using the Java language, these statements must conform to the Java Language specification).
Any text, HTML tags, JSP elements must be outside the Scriptlet
When the JSP receives the customer's request, the scriptlet is executed, and if Scriptlet has the displayed content, the displayed content is present in the Out object.