What are actions in struts?
Action Class in Struts framework defines the business logic. An action class handles the client request and prepares the response. It also decides where the response should be forwarded. Basically an action class receives data from the presentation layer and forwards the data to the corresponding business layer.
What is POJO based actions?
In struts 2, action class is POJO (Plain Old Java Object). POJO means you are not forced to implement any interface or extend any class.
What do you mean by POJO why we use POJO?
POJO stands for Plain Old Java Object. It is an ordinary Java object, not bound by any special restriction other than those forced by the Java Language Specification and not requiring any classpath. POJOs are used for increasing the readability and re-usability of a program.
What is POJO API?
POJO classes are extensively used for creating JSON and XML payloads for API. Although there are many online platform to generate POJO and Java libraries to generate POJO classes automatically but still knowing to create POJO helps.
What configuration files are used in Struts?
The struts application contains two main configuration files struts. xml file and struts. properties file. The struts.
What is Bean in JSP?
The Java Bean is a specially constructed Java class that provides a default, no-argument constructor, implements the Serializable interface and it has getter and setter methods for its properties. Use the useBean action to declare the JavaBean for use in the JSP page.
What is a JavaBean exactly?
JavaBeans are classes that encapsulate many objects into a single object (the bean). It is a java class that should follow following conventions: All properties in java bean must be private with public getters and setter methods.
How do you write POJO class in Eclipse?
Creating An Entity Object (POJO)
- Select File > New > Other… from the Eclipse menu.
- Browse to Java > Class and click the Next button.
- In the New Java Class dialog, enter the following:
- Open the new Operation.
- Add the following instance variables (future persistent fields) to the class:
What is JSON POJO?
Jackson-databind API provides the general purpose functionally for binding JSON data to Plain Old Java Object (POJO) and vice versa. The ObjectMapper class provides the functionality for reading and writing JSON, either to or from basic POJOs.