JS JSP Another important syntax is tags (tags). JSP tags are not used <%, but only the use of < characters. JSP tag is a bit like HTML tag. JSP tags can have a "start tag", a "tag body" and an "end tag." Both the start and end signs can use the name of the flag, all of which are circled within the < and > characters. The end sign is to add a backslash (/) character after the character <. The name of the sign has an embedded colon (:) character in it, where the section before the colon describes the type of the flag. Let's take an example:
<some:tag>
Body
</some:tag>
If the flag does not require a body, the start and end flags can be combined, such as:
<some:tag/>
Here we use a/> to replace the > character so that we can quickly end the flag without needing an entity. This syntax is the same as the XML one.
Flags can be divided into two types: one is reproduced from an external tag library, and the other is a predefined logo. The predefined flags start with the JSP: character. For example, Jsp:include is a predefined logo used to include other web pages.
In the previous tutorial we have learned "include directive". In fact, it is very similar to jsp:include. Instead of loading the text of the contained files in the original file, they invoke the included flags at run time. Here is an example of a jsp:include use:
<HTML>
<BODY>
Going to include hello.jsp...<br>
<jsp:include page= "hello.jsp"/>
</BODY>
</HTML>
Now change the "Jsp:include" in the above code to "Jsp:forward" to see what the difference is. In fact, these two predefined flags are very useful.
Give the practice in this section and write a JSP that will be based on a Boolean (Boolean) variable to a contained file. Here is a hint, to use HTML and scriptlets mixed programming to handle JSP flags.
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