SpringBoot后端数据校验实战操作指南

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
    <version>2.3.2.RELEASE</version>
</dependency>

import com.seckill.validator.IsMobileValidator;
import javax.validation.Constraint;
import javax.validation.Payload;
import java.lang.annotation.*;

@Target({ElementType.METHOD, ElementType.FIELD, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.PARAMETER, ElementType.TYPE_USE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Constraint(
        validatedBy = {IsMobileValidator.class}
)
public @interface IsMobile {
//    默认为true
    boolean required() default true;

    String message() default "手机号码格式错误";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

import org.thymeleaf.util.StringUtils;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class PhoneNumberValidator {
//    正则表达式
    private static final Pattern mobile_pattern=Pattern.compile("^1(3[0-9]|5[0-3,5-9]|7[0-3,5-8]|8[0-9])\\d{8}$");
    public static boolean isMobile(String mobile){
        if(StringUtils.isEmpty(mobile)){
            return false;
        }
        Matcher matcher = mobile_pattern.matcher(mobile);
        return matcher.matches();
    }
}

import com.seckill.annotations.IsMobile;
import com.seckill.utils.PhoneNumberValidator;
import org.thymeleaf.util.StringUtils;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;


public class IsMobileValidator implements ConstraintValidator<IsMobile,String> {


    private boolean required=false;
    @Override
    public void initialize(IsMobile constraintAnnotation) {
        //先获取到填的值 true/false
        required=constraintAnnotation.required();
    }

    @Override
    public boolean isValid(String s, ConstraintValidatorContext constraintValidatorContext) {
//        判断是否为必填
        if(required){  //必填
            return PhoneNumberValidator.isMobile(s);

        }else {  //非必填
            if(StringUtils.isEmpty(s)){ //非必填时填的值为空时
                return true;
            }else{ //非必填时填的值不为空时
                return PhoneNumberValidator.isMobile(s);
            }
        }
    }
}

@RestControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(Exception.class)
    public ResponseBean ExceptionHandler(Exception e){
        if(e instanceof GlobalException){
            GlobalException ex= (GlobalException) e;
            return ResponseBean.error(ex.getResponseBeanEnum());
            //			处理参数校验抛出的异常 BindException
        }else if(e instanceof BindException){
            BindException ex= (BindException) e;
            ResponseBean res=ResponseBean.error(ResponseBeanEnum.BINDING_ERROR);
            res.setMessage("参数校验异常："+ex.getAllErrors().get(0).getDefaultMessage());
            return res;

        }
        return ResponseBean.error(ResponseBeanEnum.ERROR);
    }
}

    
    @IsMobile(message = "联系电话格式不正确")
    @NotNull(message = "手机号不能为空")
    @excel(name = "选手联系电话")
    private String phoneNumber;

    @PostMapping
    public ajaxResult addInfo(@RequestBody @Validated TeamInfoDto teamInfoDto)
    {
        return toAjax(comTeamService.insert(teamInfoDto));
    }

@Data
public class TeamInfoDto {
	@NotEmpty(message = "选手信息不能为空")
    @Valid
    private List<ComUser> user;
}

public class ComUser extends BaseEntity
{
    private static final long serialVersionUID = 1L;

    private Long id;

    
    @NotNull(message = "姓名不能为空")
    private String name;

    
    @NotNull(message = "手机号不能为空")
    @IsMobile(message = "手机格式不正确")
    private String phoneNumber;

    
    @NotEmpty(message = "邮箱不能为空")
    private String email;
}