高并发秒杀系统方案（JSR303参数校验）

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

如何验证呢：

第一步，加上注解@Valid

第二步，在属性上加注解

自定义校验器：

ValidatorUtil ：

package com.imooc.miaosha.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;

public class ValidatorUtil {

    private static final Pattern mobile_pattern = Pattern.compile("1\\d{10}");

    public static boolean isMobile(String src) {
        if(StringUtils.isEmpty(src)) {
            return false;
        }
        Matcher m = mobile_pattern.matcher(src);
        return m.matches();
    }

//    public static void main(String[] args) {
//            System.out.println(isMobile("18912341234"));
//            System.out.println(isMobile("1891234123"));
//    }
}

IsMobile ：

package com.imooc.miaosha.validator;

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 "手机号码格式错误";

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

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

IsMobileValidator：

package com.imooc.miaosha.validator;
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);
            }
        }
    }

}