| Interface | Description | 
|---|---|
| HttpJspPage | The HttpJspPage interface describes the interaction that a JSP Page
 Implementation Class must satisfy when using the HTTP protocol. | 
| JspApplicationContext | 
 Stores application-scoped information for the JSP container. | 
| JspPage | The JspPage interface describes the generic interaction that a JSP Page
 Implementation class must satisfy; pages that use the HTTP protocol
 are described by the HttpJspPage interface. | 
| Class | Description | 
|---|---|
| ErrorData | Contains information about an error, for error pages. | 
| JspContext | JspContextserves as the base class for the
 PageContext class and abstracts all information that is not specific
 to servlets. | 
| JspEngineInfo | The JspEngineInfo is an abstract class that provides information on the
 current JSP engine. | 
| JspFactory | 
 The JspFactory is an abstract class that defines a number of factory
 methods available to a JSP page at runtime for the purposes of creating
 instances of various interfaces and classes used to support the JSP
 implementation. | 
| JspWriter | 
 The actions and template data in a JSP page is written using the JspWriter
 object that is referenced by the implicit variable out which is initialized
 automatically using methods in the PageContext object. | 
| PageContext | 
 PageContext extends JspContext to provide useful context information for
 when JSP technology is used in a Servlet environment. | 
| Exception | Description | 
|---|---|
| JspException | A generic exception known to the JSP engine; uncaught
 JspExceptions will result in an invocation of the errorpage
 machinery. | 
| JspTagException | Exception to be used by a Tag Handler to indicate some unrecoverable error. | 
| SkipPageException | Exception to indicate the calling page must cease evaluation. | 
The javax.servlet.jsp package contains a number of classes and interfaces that describe and define the contracts between a JSP page implementation class and the runtime environment provided for an instance of such a class by a conforming JSP container.
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