What are the different result types in struts?
What are the different result types in struts?
Predefined Result Types
| Chain Result | Used for Action Chaining |
|---|---|
| Dispatcher Result | Used for web resource integration, including JSP integration |
| FreeMarker Result | Used for FreeMarker integration |
| HttpHeader Result | Used to control special HTTP behaviors |
| Redirect Result | Used to redirect to another URL (web resource) |
Which is default result type in struts2?
dispatcher result type
The dispatcher result type is the default type, and is used if no other result type is specified. It’s used to forward to a servlet, JSP, HTML page, and so on, on the server. It uses the RequestDispatcher. forward() method.
How to use select tag in struts2?
In Struts 2 , you can use the tag to create a HTML drop down box. The syntaxs are self explanatory, but the “headerKey” and “headerValue“. The “headerKey” is a key for the first item in the drop down list, and the “headerValue” is the value expression for the first item in the drop down list.
How do you create a drop down list in struts?
In order to create a dropdown list in struts2 select /> is used on a jsp page. Just define a action name for displaying a dropdown list having value from database. In action class we define a list, and its getter and setter. and in execute method we add the elements in the list from the database.
What is return type of execute () method in struts2?
Action. Struts 2 actions don’t force you to implement any interface or extends class, it’s only required you to implement an execute() method that returns a string to indicate which result page should return.
What is OGNL in struts2?
The Object-Graph Navigation Language (OGNL) is a powerful expression language that is used to reference and manipulate data on the ValueStack. OGNL also helps in data transfer and type conversion. OGNL is based on the idea of having a root or default object within the context.
Which of the following is correct about dispatcher result type?
Explanation. The dispatcher result type is the default type and is used if no other result type is specified. Q 20 – Which of the following is correct about dispatcher result type? A – It is used to forward to a servlet, JSP, HTML page, and so on, on the server.
What are the attributes of select tag in HTML?
Attributes
| Attribute | Value | Description |
|---|---|---|
| multiple | multiple | Specifies that multiple options can be selected at once |
| name | name | Defines a name for the drop-down list |
| required | required | Specifies that the user is required to select a value before submitting the form |
| size | number | Defines the number of visible options in a drop-down list |
How fetch data from dropdown in database in JSP?
How to create dynamic drop down list in JSP from database
- Create Database. Suppose that you want to display items in a drop down list from the following table in a MySQL database:
- Create Java Model Class. Code for the model class that represents an item in the drop down list is as simple as below:
What is the use of styleId in JSP?
Form
| Attribute | Description |
|---|---|
| styleId | Specifies an identifier to be assigned to this HTML element. This creates an id attribute. |
| target | Specifies a Window target to which this form is submitted, such as for use in framed presentations. |
What is return type of execute () method?
Since this is a SELECT statement, the execute( ) method returns a boolean true to indicate that a result set is available. You can then call the Statement object’s getResultSet( ) method to retrieve the ResultSet object that contains the data from the database.
What are action classes in struts?
Action Class in Struts framework is used to define the business logic it handles the client request prepare the response or tell where the response should be forward, basically its receive the data from the view layer and forward that data to specific business layer or process the data and again forward the processed …
What is a result type in struts?
Struts allow you to use other markup languages for the view technology to present the results and popular choices include Velocity, Freemaker, XSLT and Tiles. The dispatcher result type is the default type, and is used if no other result type is specified.
Does Struts2 use JSP as the view technology?
But, Struts2 does not tie you up with using JSP as the view technology. Afterall the whole purpose of the MVC paradigm is to keep the layers separate and highly configurable. For example, for a Web2.0 client, you may want to return XML or JSON as the output.
Why doesn’t my list auto-select all values in my list?
This is important since if the value returned by your “value” attribute is NOT the same type as the key in the “list” attribute, they WILL NOT MATCH, even though their String values may be equivalent. If they don’t match, nothing in your list will be auto-selected.
How to deploy Hello World struts in Tomcat?
Now Right click on the project name and click Export > WAR File to create a War file. Then deploy this WAR in the Tomcat’s webapps directory. Finally, start Tomcat server and try to access URL http://localhost:8080/HelloWorldStruts2/index.jsp. This will produce the following screen . Enter a value “Struts2” and submit the page.
