Struts tag file

Notice that if you have multiple file form elements with different names you would be required to have another corresponding set of these methods for each file uploaded. As mentioned in the previous section one technique for uploading multiple files would be to simply have multiple form input elements of type file all with different names.

This would require a number of setter methods that was equal to 3 times the number of files being uploaded. Another option is to use Arrays or java. For the Action mapping details see struts-fileupload. The Struts 2 default. You may find in necessary to change these values. The names and default values are:. Please remember that the struts.

In order to change theses settings you define a constant in your applications struts. Additionally the fileUpload interceptor has settings that can be put in place for individual action mappings by customizing your interceptor stack. There are two separate file size limits. First is struts.

This setting exists for security reasons to prohibit a malicious user from uploading extremely large files to file up your servers disk space.

This setting defaults to approximately 2 megabytes and should be adjusted to the maximum size file 2 gigs max that your will need the framework to receive. If you are uploading more than one file on a form the struts. The other setting, maximumSize , is an interceptor setting that is used to ensure a particular Action does not receive a file that is too large. Notice the locations of both settings in the following example:. There are two ways to limit the uploaded file type, decoratively and programmatically.

To decoratively limit the file type a comma separated list of allowedTypes can be specified as a fileUpload interceptor param as shown in the following example:. It is useful when you wish to assign a variable to a complex expression and then simply reference that variable each time rather than the complex expression.

The scopes available are application, session, request, page and action. Struts 2 - Data Tags Advertisements. Previous Page. Next Page. Previous Page Print Page. Please refer to the url documentation for more information about the url tag. Examine the struts. The action node above maps the hello. If the execute method returns success , the view page HelloWorld. A common use case is that the URL also needs to include a value for a query string parameter such as userName.

To add a query string parameter and its value use the Struts 2 param tag, nested inside the url tag. For the Using Tags tutorial add the following to index. Nested inside the url tag is the Struts 2 param tag. This tag lets you specify a parameter name e. Bruce Phillips. Notice the use of the var attribute. The value of the var attribute is a reference we can use later in our code to refer to the url created. Examine the anchor tag above.

Most applications will use several data entry forms. The Struts 2 tags make creating input forms easy. Consult the Form Tags Reference for all the details about the Struts 2 form tags. To create the outer shell of the form, use the Struts 2 form tag.