How do you use annotations in Struts 2?
2) Create the action class
- package mypack;
- import org.apache.struts2.convention.annotation.*;
- @Action(value=”myAction”,results={@Result(name=”ok”,location=”/myResults/result.jsp”)})
- public class MyAction {
- private String name;
- public String getName() {
- return name;
- }
How does Struts 2 validation work?
Struts Action 2 relies on a validation framework provided by XWork to enable the application of input validation rules to your Actions before they are executed. Struts2 Validation Framework allows us to separate the validation logic from actual Java/JSP code, where it can be reviewed and easily modified later.
When validate method is called in Struts 2?
validate method If any of the if statements are true, Struts 2 will call its addFieldError method (which our Action class inherited by extending ActionSupport). If any errors have been added then Struts 2 will not proceed to call the execute method.
What is return type of validate method in Struts 2?
In Struts 2, “input” is returned when a check fails in the validate() method. I then map in struts. xml for the appropriate page.
What is struts2 convention plugin?
The Convention Plugin is bundled with Struts since 2.1 and replaces the Codebehind Plugin and Zero Config plugins. It provides the following features: Action location by package naming conventions. Result (JSP, FreeMarker, etc) location by naming conventions. Class name to URL naming convention.
Which of the following is true about Struts config XML?
Q 14 – Which of the following is true about struts-config. xml? xml configuration file is a link between the View and Model components in the Web Client. B – In form-beans section, you can map your ActionForm subclass to a name.
What is XML based validation in Struts 2?
To validate a user’s form field entries you can use a separate XML file that contains your validation rules. The XML file that contains the validation rules must be named as ActionClassName-validation. This validator checks that the user has entered a string value in the form field. …
Which of the following is correct about Struts 2 validation framework?
Rather the Struts 2 framework will return input as the result of calling the action. Hence, when validation fails and Struts 2 returns input, the Struts 2 framework will redisplay the index. jsp file. Since, we used Struts 2 form tags, Struts 2 will automatically add the error messages just above the form filed.
What is XML based validation in Struts2?
Which of the following type of validation are supported by Struts2?
Struts2 XML based validation provides more options of validation like email validation, integer range validation, form validation field, expression validation, regex validation, required validation, requiredstring validation, stringlength validation and etc.
What is the purpose of struts config xml in Struts 2?
The struts. xml file contains the configuration information that you will be modifying as actions are developed. This file can be used to override default settings for an application, for example struts.
How to validate a field in Struts 2?
In this page we will learn how to validate a field using struts 2 annotation. In action class use annotation to validate property and enable validation in form tag in jsp. This is all that we have to do for validation in struts2 using annotation. For example I have taken a user form which consist name, email and age.
Can you use Java 5 annotations in Struts 2?
Struts 2 applications can use Java 5 annotations as an alternative to XML and Java properties configuration. You can check the list of most important annotations related to different categories − Struts 2 Annotations Types.
When to use loginaction class in Struts 2?
LoginAction class is used to open user form page. In JSP page, form tag must have validate=”true” attribute. Success JSP page will be as below. To run the struts 2 application, web.xml should be configured as below. Find the struts 2 maven dependency to run the example.
Which is the best way to configure struts in Java 5?
The other way of configuring Struts is by using the Java 5 Annotations feature. Using the struts annotations, we can achieve Zero Configuration. To start using annotations in your project, make sure you have included the following jar files in your WebContent/WEB-INF/lib folder −