MVC效验器

步骤一：导入依赖

<!--数据效验-->
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.4..Final</version>
</dependency>

步骤二：实体类

　　

步骤三：新增控制器

@Controller
@RequestMapping("/person")
public class PersonController {

    @RequestMapping( value = "/validationPerson")
    //@ResponseBody
    public String validationPerson(@Validated Dog dog, BindingResult br, Model model){
        if (br.hasErrors()){
            //判断是否存在验证错误的信息
            List<ObjectError> allErrors = br.getAllErrors();
            for (ObjectError item:allErrors){
                System.out.println(""+item.getDefaultMessage());
                model.addAttribute("error",item);
            }
        }
        return "error";
    }
}

步骤四：结果