Deep understanding of NextInputs: an important concept solution in Java class libraries

Deep understanding of NextInputs: an important concept solution in Java class libraries NextInputs is a class library that provides input validation and filtering in Java development. It simplifies the process of processing user input and provides many useful functions to ensure the effectiveness and security of input. In this article, we will delve deeper into some important concepts and usage in the NextInputs class library, and provide some Java code examples to help you better understand. 1. InputValidator In NextInputs, InputValidator is a key class used to perform input validation. It allows you to create and configure validation rules, and validate the validity of input data when needed. The following is a simple example that demonstrates how to use InputValidator for mailbox format validation: InputValidator validator = new InputValidator(); validator.mandatory().email(); String email = "example@example.com"; boolean isValid = validator.check(email); In the above example, we first created an InputValidator instance and specified that the field is mandatory by calling the 'mandatory()' method. Then, by calling the 'email()' method, we specified that the data to be verified must be in a valid email format. By calling the 'check()' method, we can verify whether the input data meets the validation rules and return a Boolean value to represent the validation result. 2. Rule In NextInputs, rules are objects used to describe validation conditions. It can be a predefined rule or a custom rule. NextInputs provides many predefined rules, including email verification, phone number verification, minimum length verification, and so on. You can also create custom rules by implementing the Rule interface. The following is an example that demonstrates how to use predefined rules for minimum length validation: InputValidator validator = new InputValidator(); validator.mandatory().minLength(6); String password = "secre"; boolean isValid = validator.check(password); In the above example, we specified a minimum length of 6 characters for the password field by calling the 'minLength (6)' method. By calling the 'check()' method, we can verify whether the entered password meets the minimum length requirement. 3. Filter The filters in NextInputs are used to preprocess or filter input data. It can be used to remove spaces in strings, convert data types, and other operations. The following is an example that demonstrates how to use filters to convert strings to integers: InputValidator validator = new InputValidator(); validator.mandatory().filter(NumberFilter.integer()); String ageString = "25"; int age = validator.convert(ageString); In the above example, we first used the 'mandatory()' method to specify that the age field is mandatory. Then, by calling the 'filter (NumberFilter. integer())' method, we convert the input data into integers. Finally, by calling the 'convert()' method, we can convert the input string to an integer and return it. Summary: NextInputs is a powerful Java input validation and filtering library. By using InputValidator for input validation, using rules to describe validation conditions, and using filters to preprocess input data, we can more easily process user input and ensure its validity and security. It is important to carefully study and understand the important concepts of NextInputs in order to better utilize this class library in development.