JSP programming (II)-JSP basic syntax (7)-JSP: Forward

Redirects an HTML file, JSP file, orProgramSegment.

 JSP syntax

<JSP: Forward page = {"Relativeurl"|" <% =Expression%> "}/>

Or

<JSP: Forward page = {"Relativeurl"|" <% =Expression%> "}>

<JSP: Param name ="Parametername"

Value = "{Parametervalue| <% =Expression% >}"/> +

</Jsp: Forward>

 Example

<JSP: Forward page = "/servlet/login"/>

<JSP: Forward page = "/servlet/login">

<JSP: Param name = "username" value = "jsmith"/>

</Jsp: Forward>

Description

<JSP: Forward> the tag transfers a request object containing user requests from one JSP file to another. <JSP: Forward>Code, Cannot be executed.

You can send parameters and values to the target file. In this example, the parameter name is username and the value is Scott. If you use the <JSP: param> label, the target file must be a dynamic file that can process parameters.

If you use non-buffered output, be careful when using <JSP: Forward>. If the JSP file already has data before you use <JSP: Forward>, the file execution will fail.

Attribute

• page = "{ relativeurl | <% = Expression %>}"

  here is an expression or string used to indicate the file or URL to be targeted. this file can be JSP, program segment, or other files (such as ASP, CGI, PHP) that can process request objects ).

• +

  send one or more parameters to a dynamic file, this file must be a dynamic file.

  if you want to pass multiple parameters, you can use multiple In a JSP file. Name: Specifies the parameter name and value.