JSP Standard Actions

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JSP Standard Actions
Celsina Bignoli bignolic_at_smccd.net
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JSP Standard Actions

• The JSP specification defines a few standard
  action elements (built-in in JSP)
• The syntax
• ltjspaction-name attr1value1 attr2value2gt
• action_body
• lt/jspaction-namegt
• or (with no body)
• ltjsp action-name attr1value1
  attr2value2 /gt

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JSP Standard Actions - Example

• ltjspforward pagenextPage.jspgt
• ltjspparam nameaParam valueaValue /gt
• lt/jspforwardgt
• ltjspforward pagenextPage.jsp /gt

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Standard Actions - Listing
ltjspattributegt ltjspbodygt ltjspdoBodygt ltjspelementgt ltjspforwardgt ltjspfallbackgt ltjspgetPropertygt ltjspincludegt ltjspinvokegt used in tag files used in JSP documents ltjspoutputgt ltjspparamgt ltjspparamsgt ltjspplugingt ltjsprootgt ltjsptextgt ltjspsetPropertygt ltjspuseBeangt

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ltjspforwardgt

• passes control to another JSP page or servlet
• the execution of the current JSP page is
  terminated and control is fully passed to the
  target JSP
• Syntax 1
• ltjspforward pagepagePath /gt
• Syntax 2
• ltjspforward pagepagePath gt
• ltone or more ltjspparamgt actions
• lt/jspforwardgt

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ltjspincludegt

• includes the response of another JSP page,
  servlet or static file
• the execution of the current JSP page continues
  after including the response generated by the
  target resource
• the target resource has access to all the
  parameters and headers passed with the request.
• Additional parameters can be passed using
  ltjspparamgt actions in the body of ltjspincludegt
• Syntax 1
• ltjspinclude pagepagePath /gt
• Syntax 2
• ltjspinclude pagepagePath gt
• ltone or more ltjspparamgt actions
• lt/jspincludegt

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ltjspplugingt

• used to download Java Plugin software and invoke
  a Java applet
• Syntax
• ltjspplugin typeapplet codeCode.class
  codebaserelativePath jreversionjreVersion
  heightheight widthwidth
  hspacehSpace vSpacevspace
  iepluginurlpluginURL nspluginurlpluginURL
  namenametitletitle gt
• Optionally one ltjspparamsgt action and one
  ltjspfallbackgt action
• lt/jspplugingt

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ltjspparamsgt

• can only be used within the body of a
  ltjspplugingt action to enclose a set of
  ltjspparamgt actions that specify the applet
  parameters
• Syntax
• ltjspparamsgt
• One or more ltjspparamgt action
• lt/jspparamsgt

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ltjspfallbackgt

• can only be used within the body of a
  ltjspplugingt
• Specifies the template text to use for browser
  that dont support the lthtmlgt or ltobjectgt
  elements
• Syntax
• ltjspfallbackgt
• Fallback body
• lt/jspfallbackgt

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ltjspplugingt - Example

• ltjspplugin typeapplet codeClock2.class
  codebaseapplet jreversion1.2 width160
  height160 gt
• ltjspparamsgt
• ltjspparam namebgcolor valuecc00ff /gt
• lt/jspparamsgt
• ltjspfallbackgt
• Plugin tag OBJECT or EMBED not supported by
  the
• browser
• lt/jspfallbackgt
• lt/jspplugingt

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ltjspattributegt

• defines an attribute value for another jsp action
• Syntax
• ltjspattribute nameattrName gt
• Attribute value
• lt/jspattributegt

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ltjspbodygt

• defines the body for an action element
• Only required when the action attributes are
  defined using ltjspattributegt
• Syntax
• ltjspbodygt
• Body content
• lt/jspbodygt

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ltjspbodygt - Example

• ltjspplugin typeapplet codeClock2.class
• codebaseapplet jreversion1.2gt
• ltjspattribute namewidthgt160lt/jspattributegt
• ltjspattribute nameheightgt160lt/jspattributegt
  
• ltjspbodygt
• ltjspparamsgt
• ltjspparam namebgcolor valuecc00ff /gt
• lt/jspparamsgt
• ltjspfallbackgt
• Plugin tag OBJECT or EMBED not supported by
  the
• browser
• lt/jspfallbackgt
• lt/jspbodygt
• lt/jspplugingt