HTML comment
Display a comment on the client.
JSP syntax
<! -- Comment [<% = expression %>] -->
Example 1
<! -- This file displays the user login screen -->
Generate the same data as the above in the HTML source code of the client:
<! -- This file displays the user login screen -->
Example 2
<! -- This page was loaded on <% = (New java. util. Date (). tolocalestring () %> -->
In the HTML source code of the client, it is displayed:
<! -- This page was loaded on January 1, 2000 -->
Description
This annotation is similar to HTML, that is, it can be seen in "View Source Code.
The only difference is that you can use an expression in this comment (Example 2 ). This expression is indefinite. Different pages allow you to use various expressions as long as they are valid.
Hide comments
Written in the JSP program, but not sent to the customer.
JSP syntax
<% -- Comment -- %>
Example:
<% @ Page Language = "Java" %>
<HTML>
<Head> <title> A comment test </title> <Body>
<H2> A test of comments </H2>
<% -- This comment will not be visible in the page source -- %>
</Body>
</Html>
Description
Characters marked with hidden comments are ignored during JSP compilation. This annotation is useful when you want to hide or annotate your JSP program.
The JSP compiler does not compile the statements between <% -- and -- %>. It is not displayed in the client's browser, you can write comments between <% -- %> in the source code, but cannot use "-- %> ", if you want to use it, use "-- %/> ".
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
