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("testHibernateValidate@sohu.com");
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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