Using the Java library verification framework to improve code quality

Use the Java library to verify the framework to improve code quality In the process of software development, it is crucial to ensure the quality of code.Error data input often cause system failure, data damage, and security vulnerabilities.In order to effectively verify user input and data, Java provides many powerful verification frameworks that can greatly improve code quality.This article will introduce how to use the verification framework in the Java library to implement data verification and provide some example code to help understand. The most commonly used verification framework in the Java class library is the Bean verification framework defined in the JSR 380 specification, also known as Java Bean Validation.This framework uses the method of annotations to define verification rules by adding specific annotations to the attributes of the physical class.During the verification process, the program will automatically check these annotations and perform data verification according to the rules.Here are some commonly used Bean verification annotations: 1. @Notnull: It is used to verify that the attribute value cannot be NULL. 2. @NotBlank: It is used to verify the string attribute value cannot be empty or blank characters. 3. @size: Used to verify the size of the attribute value of the set or string. 4. @Min and @Max: The minimum and maximum values for verifying the digital attribute values. 5. @email: Used to verify whether the attribute value is an effective email address. The example code is shown below: public class User { @Notnull (Message = "Name cannot be empty") private String name; @Email (Message = "Email format is incorrect") private String email; @Size (min = 6, max = 12, message = "password length must be between 6 and 12") private String password; // omit other attributes and methods } The above code defines a User class. The name property uses @Notnull annotations, the email attribute uses @EMail Note, and the Password attribute uses @Size annotations.When data verification is performed by instances of this class, the program will automatically check these annotations and verify it according to the rules defined by the annotation. In addition to the Bean verification framework, there are other verification frameworks in the Java library that can be used for specific verification requirements.For example, the Apache Commons Lang library provides a set of verification methods, such as IsnotBlank () to verify that the string cannot be empty or blank characters, Isnumeric () is used to verify whether the string is numbers, etc.The example code is shown below: String name = "John Doe"; if (StringUtils.isNotBlank(name)) { // Execute related operations } String age = "25"; if (StringUtils.isNumeric(age)) { int ageValue = Integer.parseInt(age); // Execute related operations } The above code uses the verification method in the Apache Commons Lang library to verify the string to ensure that the string is not empty or blank characters, and the string is numbers. In summary, the verification framework in the Java class library provides us with a powerful and flexible verification function, which can help us improve the quality of code during the development process.By using these verification framework reasonably, we can effectively prevent error data input and reduce the risk of system failure and security vulnerabilities. I hope this article will help you understand how to use the verification framework in the Java class library to improve the quality of code!