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# JSP Directives JSP directives are used to set attributes related to the entire JSP page, such as the page's encoding and scripting language. The syntax format is as follows: A directive can have many attributes, which exist in the form of key-value pairs and are separated by commas. The three directive tags in JSP: | **Directive** | **Description** | | --- | --- | | | Defines page-dependent attributes, such as scripting language, error page, caching requirements, etc. | | | Includes other files | | | Introduces the definition of a tag library | * * * ## Page Directive The Page directive provides instructions for the container on how to use the current page. A JSP page can contain multiple page directives. The syntax format for the Page directive: Equivalent XML format: * * * ## Attributes The following table lists the attributes associated with the Page directive: | **Attribute** | **Description** | | --- | --- | | buffer | Specifies the size of the buffer used by the out object | | autoFlush | Controls the buffer of the out object | | contentType | Specifies the MIME type and character encoding for the current JSP page | | errorPage | Specifies the error handling page to redirect to when an exception occurs in the JSP page | | isErrorPage | Specifies whether the current page can serve as the error handling page for another JSP page | | extends | Specifies the class from which the servlet inherits | | import | Imports Java classes to be used | | info | Defines descriptive information for the JSP page | | isThreadSafe | Specifies whether access to the JSP page is thread-safe | | language | Defines the scripting language used in the JSP page, default is Java | | session | Specifies whether the JSP page uses sessions | | isELIgnored | Specifies whether to evaluate EL expressions | | isScriptingEnabled | Determines whether scripting elements can be used | * * * ## Include Directive JSP can include other files using the include directive. The included file can be a JSP file, an HTML file, or a text file. The included file is treated as part of the JSP file and is compiled and executed together. The syntax format for the include directive is as follows: The filename in the **include** directive is actually a relative URL address. If you do not associate a path with the file, the JSP compiler will look for it in the current path by default. Equivalent XML syntax: * * * ## Taglib Directive The JSP API allows users to define custom tags. A custom tag library is a collection of custom tags. The Taglib directive introduces the definition of a collection of custom tags, including the library path and custom tags. The syntax for the Taglib directive: The uri attribute determines the location of the tag library, and the prefix attribute specifies the prefix for the tag library. Equivalent XML syntax: