Spring 使用Validation 验证框架的问题详解

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

@Configuration
public class WEBConfig {
    @Bean
    public Validator validator() {
        ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
                .configure()
                //failFast的意思只要出现校验失败的情况，就立即结束校验，不再进行后续的校验。
                .failFast(true)
                .buildValidatorFactory();
 
        return validatorFactory.getValidator();
    }
 
    @Bean
    public MethodValidationPostProcessor methodValidationPostProcessor() {
        MethodValidationPostProcessor methodValidationPostProcessor = new MethodValidationPostProcessor();
        methodValidationPostProcessor.setValidator(validator());
        return methodValidationPostProcessor;
    }
}

@Slf4j
@ControllerAdvice
public class ValidatedExceptionHandler {

    @ResponseBody
    @ExceptionHandler(BindException.class)
    public String exceptionHandler2(BindException exception) {
        BindingResult result = exception.getBindingResult();
        if (result.hasErrors()) {
            return result.getAllErrors().get(0).getDefaultMessage();
        }
        return "参数不可为空！";
    }

    @ResponseBody
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public String exceptionHandler2(MethodArgumentNotValidException exception) {
        BindingResult result = exception.getBindingResult();
        if (result.hasErrors()) {
            return result.getAllErrors().get(0).getDefaultMessage();
        }
        return "参数不可为空！";
    }
}

@Data
public class ValidDto {
    @NotEmpty(message = "name 不可为空！")
    private String name;

    @NotBlank(message = "userId 不可为空！")
    private String userId;

    @Min(value = 1, message = "年龄有误！")
    @Max(value = 120, message = "年龄有误！")
    private int age;

    @NotBlank(message = "邮箱不可为空！")
    @Email(message = "邮箱有误！")
    private String email;

    @NotBlank(message = "mobile不可为空！")
    @Pattern(regexp = "^(13[0-9]|14[579]|15[0-3,5-9]|16[6]|17[0135678]|18[0-9]|19[89])\\d{8}$", message = "手机号码有误！")
    private String mobile;

    @NotNull(message = "validVo 不可为空！")
    @Valid
    private ValidVo validVo;

    @NotEmpty(message = "list1 不可为空！")
    @Size(min = 1, max = 2, message = "list1 数据过大")
    @Valid
    private List<ValidVo> list1;
}

@Data
public class ValidVo {
    @NotBlank(message = "gender is null")
    private String gender;
    @NotBlank(message = "test is null")
    private String test;
}

@RestController
@RequestMapping("/valid")
@CrossOrigin
public class ValidController {

    @GetMapping("/GetTest")
    public String getTest(@Valid ValidDto dto, BindingResult result) {
        if (result.hasErrors()) {
            return result.getAllErrors().get(0).getDefaultMessage();
        }
        return "success";
    }

    @GetMapping("/GetTest2")
    public String getTest2(@Validated ValidDto dto) {

        return "success";
    }

    @GetMapping("/GetTest3")
    public String getTest3(@Validated @RequestBody ValidDto dto) {

        return "success";
    }
}