Learn the syntax and usage scenarios of JSP comments

How to write JSP comments

There are two types of JSP comments: single-line comments and multi-line comments.

Single-line comments

Single-line comments start with and end with <code>--%>. The content of the comment is not parsed and therefore does not appear in the output. For example:

<%-- 这是一条单行注释 --%>

Multi-line comments

Multi-line comments start with /* and end with */. The content of the comment is not parsed and therefore does not appear in the output. For example:

/*
这是
一条
多行
注释
*/

Application scenarios of JSP comments

JSP comments can be used in the following scenarios:

• Comment code: Comments can be used to comment code to improve code readability and maintainability. For example:

<%-- 这是一段注释代码 --%>

• Hidden code: Comments can be used to hide code to prevent it from being seen or executed by others. For example:

<%--
这
是
一
段
隐
藏
代
码
--%>

• Logging: Comments can be used to record logs to record the running status of the program. For example:

<%--
这
是
一
条
日
志
记
录
--%>

JSP commented code examples

The following are some JSP commented code examples:

• Commented code:

<%--
这段代码用于计算两个数字的和。
--%>

• Hidden code：

<%--
这段代码用于连接数据库。
--%>

• Record log：

<%--
这段代码用于记录程序的运行情况。
--%>

Summary

JSP comments are a very useful tool that can be used to comment code, hide code and record logs. Comments can improve the readability and maintainability of your code and prevent it from being seen or executed by others.

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