hibernate_validator_01，hibernatevalidator
1.環境准備(Maven工程)
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.wy</groupId>
<artifactId>validator_1</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.2.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
</project>
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2.准備po類
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package po;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
/**
* Created by Administrator on 2016/7/12.
*/
public class Car {
@NotNull
private String manufacturer;
@NotNull
@Size(min = 2, max = 14)
private String licensePlate;
@Min(2)
private int seatCount;
public Car(String manufacturer, String licencePlate, int seatCount) {
this.manufacturer = manufacturer;
this.licensePlate = licencePlate;
this.seatCount = seatCount;
}
}
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3.驗證測試
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package test;
import org.junit.BeforeClass;
import org.junit.Test;
import po.Car;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import java.util.Set;
/**
* Created by Administrator on 2016/7/12.
*/
public class CarTest {
private static Validator validator;
/*獲取驗證器*/
@BeforeClass
public static void setUp() {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
validator = factory.getValidator();
}
@Test
public void test1() {
Car car = new Car(null, "DD-AB-123", 4);
//validate() 方法會返回一個set的 ConstraintViolation 的實例的集合, 我們可以通過遍歷它來查看哪些驗證錯誤
Set<ConstraintViolation<Car>> constraintViolations = validator.validate(car);
System.out.println(constraintViolations.size());
System.out.println(constraintViolations);
//[ConstraintViolationImpl{interpolatedMessage='不能為null', propertyPath=manufacturer, rootBeanClass=class po.Car, messageTemplate='{javax.validation.constraints.NotNull.message}'}]
}
@Test
public void licensePlateTooShort() {
Car car = new Car("Morris", "D", 4);
Set<ConstraintViolation<Car>> constraintViolations =
validator.validate(car);
System.out.println(constraintViolations.size());
System.out.println(constraintViolations);
//[ConstraintViolationImpl{interpolatedMessage='個數必須在2和14之間', propertyPath=licensePlate, rootBeanClass=class po.Car, messageTemplate='{javax.validation.constraints.Size.message}'}]
}
@Test
public void seatCountTooLow() {
Car car = new Car("Morris", "DD-AB-123", 1);
Set<ConstraintViolation<Car>> constraintViolations =
validator.validate(car);
System.out.println(constraintViolations.size());
System.out.println(constraintViolations);
//[ConstraintViolationImpl{interpolatedMessage='最小不能小於2', propertyPath=seatCount, rootBeanClass=class po.Car, messageTemplate='{javax.validation.constraints.Min.message}'}]
}
@Test
public void carIsValid() {
Car car = new Car("Morris", "DD-AB-123", 2);
Set<ConstraintViolation<Car>> constraintViolations =
validator.validate(car);
System.out.println(constraintViolations.size());
System.out.println(constraintViolations);
//此時為一切正常
}
}
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