jsr303 Bean參數校驗

1、這裏用的是spring boot ，引入依賴

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

2、已經實現了註解，不多介紹。自定義註解驗證

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import javax.validation.Constraint;
import javax.validation.Payload;

@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = {IsMobileValidator.class })
public @interface  IsMobile {

    boolean required() default true; 

    String message() default "手機號碼格式錯誤";

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

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

import  javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

import org.apache.commons.lang3.StringUtils;

import com.imooc.miaosha.util.ValidatorUtil;

public class IsMobileValidator implements ConstraintValidator<IsMobile, String> {

    private boolean required = false;

    public void initialize(IsMobile constraintAnnotation) {
        required = constraintAnnotation.required();
    }

    public boolean isValid(String value, ConstraintValidatorContext context) {
        if(required) {
            return ValidatorUtil.isMobile(value);
        }else {
            if(StringUtils.isEmpty(value)) {
                return true;
            }else {
                return ValidatorUtil.isMobile(value); //自己實現的正則校驗手機號工具類
            }
        }
    }