Hibernate Validator （JSR303）校验

想搭建基于JSR303的项目环境，你需要如下4个构件：

hibernate-validator-4.2.0.Final.jar

slf4j-api-1.6.1.jar

validation-api-1.0.0.GA.jar

一个简单的POJO，其中采用如下效验规则：

package com.test.request.bean;

import java.util.Date;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Past;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.Email;

public class InfoBean 
{
    @NotNull(message = "姓名不能为空!")
    @Min(value = 1, message = "Id只能大于等于1，小于等于10")
    @Max(value = 10, message = "Id只能大于等于1，小于等于10")
    private Integer id;
    
    @NotNull(message = "姓名不能为空!")
    @Size(min = 2, max = 4, message = "姓名长度必须在{min}和{max}之间")
    @Pattern(regexp = "[\u4e00-\u9fa5]+", message = "名称只能输入是中文字符")
    private String userName;
    
    @NotNull(message = "密码不能为空!")
    @Size(min = 6, max = 12, message = "密码长度必须在{min}和{max}之间")
    private String passWord;
    
    @NotNull(message = "日期不能为空!")
    @Past(message = "你只能输入过去的提起") 
    private Date birthday;
    
    @NotNull(message = "邮件不能为空!")
    @Email(message = "邮件格式不正确")
    private String email;

此处省略set和get方法    
}

既然POJO也定义好了，我们还需要使用到ValidatorFactory来获取效验工厂实例，并帮助我们完成基础的效验步骤工作：

package com.test.request.bean;

import java.util.Date;
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 InfoBeanTest 
{
    @Test
    public void test() throws Exception 
    {
        /* 创建效验工厂 */
        ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory(); 
        Validator validator = validatorFactory.getValidator(); 

        /* 信息封装 */
        InfoBean infoBean = new InfoBean();
        infoBean.setId(-1);
        infoBean.setUserName("张三");
        infoBean.setPassWord("123456");
        infoBean.setEmail("test@test.com");
        infoBean.setBirthday(new Date());
        
        /* 将类型装载效验 */
        Set<ConstraintViolation<InfoBean>> set = validator.validate(infoBean); 
        for (ConstraintViolation<InfoBean> constraintViolation : set) 
            System.out.println("错误：" + constraintViolation.getMessage()); 
    }
}