The working principle analysis of the NEXTINPUTS framework in the Java class library

NextInputs is an input verification framework for Java libraries. It provides a simple and effective way to verify and process user input data to ensure the correctness and security of the data.This article will analyze the working principle of the NextInputs framework. The NextInPuts framework is mainly based on the Chain of Responsibility to implement the input verification process.It encapsulates different verification rules in different processors (Handler), and each processor only cares about one verification rule.When the verification process begins, the data is passed to different processors in order for verification. Only when all processors pass the data, the verification is considered successful. Below is an example of the Java code, which demonstrates how to use the NextInPuts framework for input verification: public class UserRegistrationValidator { private final NextInputs inputs; public UserRegistrationValidator() { inputs = new NextInputs(); } public boolean validate(String name, String email, String password) { inputs.clear(); // Add data and verification rules inputs.add(name) .next(RequiredValidator.getInstance()) .setMessage ("Name cannot be empty"); inputs.add(email) .next(RequiredValidator.getInstance()) .setMessage ("Email cannot be empty") .next(EmailValidator.getInstance()) .setMessage ("Incorrect email format"); inputs.add(password) .next(RequiredValidator.getInstance()) .setMessage ("Password cannot be empty") .next(MinLengthValidator.getInstance(6)) .setMessage ("Password length is at least 6"); // Execute verification return inputs.test(); } } In the above examples, first create an `NextInputs" object, and then add verification rules to each input item (name, mailbox, password) in turn.For example, for the name field, add a `requiredValidator` (used to check whether the field is empty), and then set the corresponding error information; for the mailbox field, add a` Requiredvalidator` first, and then add a `emailvalidator` (used to checkWhether the mailbox format is correct) and set the corresponding error information.Finally, the verification results are performed by calling the method of calling `Inputs.test ()` and return the verification results. By using the NextinPuts framework, we can easily verify the user input data, and only need to add the corresponding verification rules according to the needs.This can improve the maintenance and reused of code, reduce the workload of developers for input verification, and improve the accuracy and reliability of verification. In summary, the NextInputs framework implements the input verification process through the liability chain mode, providing a simple and effective way to verify and process user input data.By using this framework, developers can quickly build input verification logic to ensure the correctness and security of the data.