Processing form and verified Java class libraries in AngularJS
AngularJS is a very popular JavaScript framework that is used to build a dynamic web application.Through AngularJS, you can easily process the form and verify the input.In AngularJS, you can use some Java class libraries to process forms and verification.This article will introduce some Java libraries commonly used in AngularJS and provide some example code.
1. Apache Commons Validator:
Apache Commons Validator is a powerful Java class library for verifying the input value.It provides many built -in validators, such as EmailValidator, CreditCardValidator, RegexValidator, etc., which can be easily used in AngularJS.
Example code:
import org.apache.commons.validator.routines.EmailValidator;
// Use Apache Commons Validator to verify Email in AngularJS
var email = "test@example.com";
if (EmailValidator.getInstance().isValid(email)) {
// email verification passed
} else {
// email verification failed
}
2. Hibernate Validator:
Hibernate Validator is a laboratory that implements the Java Bean verification API specification (JSR 380).It can verify the attributes of Java Bean at runtime to ensure the effectiveness and integrity of the input.
Example code:
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
public class User {
@Email (Message = "Please enter the valid email address"))
private String email;
@Length (min = 6, max = 20, message = "The password length must be between 6 and 20 characters"))
private String password;
// getters and setters
}
// Use Hibernate Validator to verify Java Bean in AngularJS
var user = new User();
user.setEmail("test@example.com");
user.setPassword("password");
var validatorFactory = Validation.buildDefaultValidatorFactory();
var validator = validatorFactory.getValidator();
var violations = validator.validate(user);
if (violations.isEmpty()) {
//
} else {
// Failure to check
// Treatment the error message that violates constraints
}
3. JSoup:
If you need to extract and process HTML data from the form, JSOUP is a very useful library.It provides convenient methods to resolve HTML and extract data from it.
Example code:
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
// Analyze HTML data
var html = "<div> <p> This is a section of html text </p> </div>" "";
var doc = Jsoup.parse(html);
var paragraphs = doc.select("p");
for (var p : paragraphs) {
// Treat each paragraph
}
The above are some commonly used Java class libraries and sample codes that are commonly used in the form and verifying input in AngularJS.These libraries can easily help you process form data, verify user input, and extract and process HTML data.No matter what type of application you develop, these libraries will provide you with valuable help and accelerate the development process.
