Hibernate-Validation的使用和常用的注解

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

 

@RequestMapping(value = "/save.action", method = RequestMethod.POST)
public String save(@Validated( { Second.class }) UserModel userModel, BindingResult result) {
    if (result.hasErrors()) {
        return "validate/error";
    }
    return "redirect:/success";
}

@RequestMapping(value = "/update.action", method = RequestMethod.POST)
public String update(@Validated( { First.class, Second.class }) UserModel user, BindingResult result) {
    if (result.hasErrors()) {
        return "validate/error";
    }
    return "redirect:/success";
}

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> 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> 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