Hibernate-Validation的使用

首先是要加入下面两个包

hibernate-validator-4.1.0.Final.jar
 validation-api-1.0.0.GA.jar

 

如果在验证不通过的时候进行了添加、更新或删除操作的时候,则会抛出javax.validation.ConstraintViolationException异常

下面是测试用的类

 

Model2:

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.TableGenerator;
import javax.validation.Valid;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.URL;

@Entity
@Table(name="t_Model2")
@TableGenerator(name="mytable",initialValue=1,allocationSize=1)
public class Model2 {

	private int id;
	private String name;
	private String address;
	private String phoneNumber;
	private String email;
	private int age;
	private Model3 model3;
	private String url;

	@Id
	@GeneratedValue(generator="mytable",strategy=GenerationType.TABLE)
	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	@NotNull(message="姓名不能为空!")
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@NotNull(message="地址不能为空!")
	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	@Size(max=11,min=11,message="长度只能为11位!")
	public String getPhoneNumber() {
		return phoneNumber;
	}

	public void setPhoneNumber(String phoneNumber) {
		this.phoneNumber = phoneNumber;
	}

	@Email(message="email地址无效!")
	@NotNull(message="email地址不能为空!")
	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	@NotNull(message = "Model3不能为空!")
	@Valid
	@ManyToOne
	public Model3 getModel3() {
		return model3;
	}

	public void setModel3(Model3 model3) {
		this.model3 = model3;
	}

	@Min(value=18,message="必须年满18岁!")
	@Max(value=30,message="年龄不能大于30岁!")
	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	@URL(message="无效的URL地址")
	@NotNull(message = "URL不能为空!")
	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}
	
}

 Model3:

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;

@Entity
@Table(name="t_Model3")
public class Model3 {

	private int id;
	
	private String name;

	@Id
	@GeneratedValue
	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	@NotNull(message="model3的名称不能为空!")
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
	
}

 

Test类:

import org.springframework.context.ApplicationContext;

import com.tiantian.test.model.Model2;
import com.tiantian.test.service.Model2Service;
import com.tiantian.test20110430.util.Util;

public class Test1 {

	public static void main(String args[]) {
		ApplicationContext context = Util.getContext();
		Model2Service service = context.getBean(Model2Service.class);
		Model2 model = new Model2();
		model.setName("hello");
		model.setEmail("[email protected]");
		model.setAddress("湖南长沙");
		model.setPhoneNumber("15012345678");

		String result = Util.validateModel(model);// 返回的验证结果,验证结果就是一个字符串,如果有错误的话则该字符串的长度大于0
		System.out.println(result);
		if (result.length() == 0)// 验证不通过的时候就不添加
			service.add(model);

	}

}

 

 上面用到的Util类:

import java.util.Iterator;
import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Util {

	private static ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
	
	public static ApplicationContext getContext() {
		return context;
	}
	
	public static String validateModel(Object obj) {//验证某一个对象
		
		StringBuffer buffer = new StringBuffer(64);//用于存储验证后的错误信息
		
		Validator validator = Validation.buildDefaultValidatorFactory()
				.getValidator();

		Set<ConstraintViolation<Object>> constraintViolations = validator
				.validate(obj);//验证某个对象,,其实也可以只验证其中的某一个属性的

		Iterator<ConstraintViolation<Object>> iter = constraintViolations
				.iterator();
		while (iter.hasNext()) {
			String message = iter.next().getMessage();
			buffer.append(message);
		}
		return buffer.toString();
	}
	
}

 

 

下面是一些主要的注解:

@AssertTrue //用于boolean字段,该字段只能为true
		@AssertFalse//该字段的值只能为false
		@CreditCardNumber//对信用卡号进行一个大致的验证
		@DecimalMax//只能小于或等于该值
		@DecimalMin//只能大于或等于该值
		@Digits(integer=2,fraction=20)//检查是否是一种数字的整数、分数,小数位数的数字。
		@Email//检查是否是一个有效的email地址
		@Future//检查该字段的日期是否是属于将来的日期
		@Length(min=,max=)//检查所属的字段的长度是否在min和max之间,只能用于字符串
		@Max//该字段的值只能小于或等于该值
		@Min//该字段的值只能大于或等于该值
		@NotNull//不能为null
		@NotBlank//不能为空,检查时会将空格忽略
		@NotEmpty//不能为空,这里的空是指空字符串
		@Null//检查该字段为空
		@Past//检查该字段的日期是在过去
		@Size(min=, max=)//检查该字段的size是否在min和max之间,可以是字符串、数组、集合、Map等
		@URL(protocol=,host,port)//检查是否是一个有效的URL,如果提供了protocol,host等,则该URL还需满足提供的条件
		@Valid//该注解只要用于字段为一个包含其他对象的集合或map或数组的字段,或该字段直接为一个其他对象的引用,
				//这样在检查当前对象的同时也会检查该字段所引用的对象

 

 

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