Bean Validation小结

最近，前辈们在项目中使用了Bean Validation，于是在晚上找些资料学习一下，

这是通过注解的方式对数据进行一系列的验证，还是比较好理解的。

package org.ygy.demo.validator;

import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

import lombok.Data;

@Data
public class UserEntity implements java.io.Serializable {
	private static final long serialVersionUID = -5673164765453841780L;

	@NotNull(message = "ID不能为空！")
	private Integer id;

	@NotNull(message = "姓名不能为空！")
	@Size(min = 2, max = 10, message = "姓名为2-10个字符")
	private String name;

	@NotNull(message = "密码不能为空！")
	@Min(value = 2 , message = "秘密最少2个字符")
	private String password;

}

大概就是这个样子，会在以后的工作中慢慢使用并理解。

package org.ygy.demo.validator;

import java.util.Set;

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

import org.junit.Test;

public class ValidatorTest {
	
	@Test
	public void testUserEntity() {
		UserEntity user = new UserEntity();
		user.setId(100);
		user.setName("a");
		user.setPassword("s");
		
		ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
		Validator validator = factory.getValidator();
		
		Set<ConstraintViolation<UserEntity>> validations = validator.validate(user);
		for(ConstraintViolation<UserEntity> each : validations) {
			System.out.println(each.getRootBean());
			System.out.println(each.getRootBeanClass());
			System.out.println(each.getLeafBean());
			System.out.println(each.getPropertyPath());
			System.out.println(each.getMessage());
			System.out.println(each.getInvalidValue());
		}
	}
}

这是Java EE 中的接口规范，Hibernate有自己的实现，

<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>org.ygy.demo</groupId>
	<artifactId>validator</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>validator</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.10</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>0.12.0</version>
		</dependency>

		<!-- <dependency> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> 
			<version>6.0</version> </dependency> -->

		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-validator</artifactId>
			<version>4.1.0.CR1</version>
		</dependency>

		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.7.5</version>
		</dependency>

		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>1.7.5</version>
		</dependency>

	</dependencies>
</project>

这里还有一篇IBM的文章介绍Bean Validation

http://www.ibm.com/developerworks/cn/java/j-lo-beanvalid/

还有一篇也记下：

http://my.oschina.net/zhaoqian/blog/118458