hibernate-validator校验框架学习

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.4.1.Final</version>
</dependency>
<dependency>
    <groupId>javax.el</groupId>
    <artifactId>javax.el-api</artifactId>
    <version>2.2.4</version>
</dependency>
<dependency>
    <groupId>org.glassfish.web</groupId>
     <artifactId>javax.el</artifactId>
    <version>2.2.4</version>
</dependency>

<mvc:annotation-driven conversion-service="conversionService" validator="validator"/>
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
　　<property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property>
　　<property name="validationMessageSource" ref="messageSource"></property>
</bean>
<!-- 检验错误信息资源配置文件 -->
<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
　　<property name="basenames">
　　　　<list>
　　　　　　<value>classpath:validator/validationMessages</value>
　　　　</list>
　　</property>
　　<!-- 资源文件编码格式 -->
　　<property name="fileEncodings" value="utf-8"/>
　　<!-- 对资源文件内容的缓存时间，单位秒 -->
　　<property name="cacheSeconds" value="120"/>
</bean>

private Integer stuId;
@NotBlank(message = "{notnull}")
@Size(max = 20, min = 2, message = "姓名长度在2-20之间")
private String name;
@Max(value = 200, message = "最大年龄200岁")
@Min(value = 6, message = "最小年龄6岁")
private Integer age;

@RequestMapping(value = "/add", method = { RequestMethod.GET, RequestMethod.POST })
public String addStudent(Model model, HttpServletRequest request, @Validated Student stu,
        BindingResult bindingResult) {
    if (HttpRequestContext.GET.equalsIgnoreCase(request.getMethod())) {
        return "prictice/student/addStudent";
    } else {
        if (bindingResult.hasErrors()) {
            List<ObjectError> errors = bindingResult.getAllErrors();
            model.addAttribute("errors", errors);
            return "prictice/student/addStudent";
        }
        stu.setRegTime(new Date());
        stu.setStatus(true);
        studentService.addStudent(stu);
        return "redirect:/student/list";
    }
}

public class ValidateUtil {

    public static <T> void validate(T obj) {
        LocalValidatorFactoryBean validator = (LocalValidatorFactoryBean) SpringContextHolder.getBean("validator");
        Set<ConstraintViolation<T>> constraintViolations = validator.validate(obj);
        Iterator<ConstraintViolation<T>> iter = constraintViolations.iterator();
        while (iter.hasNext()) {
            ConstraintViolation<T> error = iter.next();
            StringBuffer buffer = new StringBuffer().append("[")
                    .append(error.getPropertyPath().toString()).append("]")
                    .append(error.getMessage());
            throw new IllegalArgumentException(buffer.toString());
        }
    }
}

ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();

@RequestMapping(value = "/add")
public String addStudent(@RequestParam Student stu) {
    ValidateUtil.validate(stu);
    return "redirect:/student/list"
}