JSP syntax Overview

1,JSPExpression:<% = Expression %>Calculates the expression and outputs the result. EquivalentXMLExpression:

<JSP: expression>

Expression

</Jsp: expression>

The following predefined variables are available:Request, Response, Out, Session, Application, Config, Pagecontext. You can alsoJSP Scriptlet.

JSP Scriptlet<% Code %> code inserted to the service method. EquivalentXMLExpression:

<JSP: scriptlet>

Code

</Jsp: scriptlet>

2,JSPDeclaration: <%! Code %> the code is insertedServletClass (outside the service method ). EquivalentXMLExpression:

<JSP: Declaration>

Code

</Jsp: Declaration>

 

3. The page command <% @ pageatt = "Val" %> acts onServletGlobal commands of the engine. EquivalentXMLExpression is

<JSP:Directive. Page ATT = "Val" \>.

The valid attributes are as follows:

Import = "package. Class"

Contenttype = "mime-type"

Isthreadsafe = "True | false"

Session = "True | false"

Buffer = "size kb | none"

Autoflush = "True | false"

Extends = "package. Class"

Info = "message"

Errorpage ="URL"

Iserrorpage = "True | false"

Language = "Java"

4. include command <% @ include file ="URL"%> WhenJSPConvertServletMust contain the specified files on the local system. EquivalentXMLExpression:

<JSP:Directive. Include File ="URL"\>. WhereURLMust be relativeURL.

The JSP: include action can be used in the request (insteadJSPConvertServlet.

5,JSPAnnotation <% -- Comment -- %> annotation;JSPConvertServletIs ignored. If you want to embed comments into the resultsHtmlDocument, using commonHtmlAnnotation mark <-- Comment -->.

6. jsp: include action <JSP: Include page = "relativeURL"Flush =" true "/> whenServletWhen a request is sent, the specified file is introduced. If you want to include a file during page conversion, useJSPInclude command.

Note: On Some servers, the contained files must beHtmlFile orJSPFile, which is determined by the server (usually determined based on the file extension ).

7. jsp: usebean action <JSP: usebean ATT = Val */> or

<JSP: usebean ATT = Val *>... </jsp: usebean>

Find or instantiateJavaBean. Possible attributes include:

Id = "name"

Scope = "Page | request

| Session | application"

Class = "package. Class"

Type = "package. Class"

Beanname = "package. Class"

 

8. jsp: setproperty action <JSP: setproperty ATT = Val */> set bean attributes

Valid attributes include:

Name = "beanname"

Property = "propertyname | *"

Param = "parametername"

Value = "Val"

9. jsp: getproperty action <JSP: getproperty name = "propertyname" value = "Val"/> extracts and outputs bean attributes.

JSP: forward action <JSP: Forward page = "relativeURL"/> Transfer the request to another page.

JSP: plugin action <JSP: plugin attribute = "value" *>

10. </jsp: plugin> Generate the object or embed tag Based on the browser typeJavaPlugin runningJavaApplet.