Java秒杀系统-2.4-jsr303参数校验

 1.导入依赖

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

2.IsMobile

是否是电话号码，调用校验器

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 })//调用校验器
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 { };
}

3. IsMobileValidator   校验器

package com.zengjx.miaosha.validator;

import com.zengjx.miaosha.utils.ValidatorUtil;
import org.springframework.util.StringUtils;

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

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);
			}
		}
	}

}

 ConstraintValidator 有两个参数自定义的注解和修饰的字段。

public interface ConstraintValidator<A extends Annotation, T>

 4.  ValidatorUtil 

package com.zengjx.miaosha.utils;

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

import org.apache.commons.lang3.StringUtils;

/***
 * 电话号码有效性11位校验
 */
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("18046059785"));
			System.out.println(isMobile("1891234123"));
	}
}

5. 自带的  判空 @NotNull

/*
 * Bean Validation API
 *
 * License: Apache License, Version 2.0
 * See the license.txt file in the root directory or <http://www.apache.org/licenses/LICENSE-2.0>.
 */
package javax.validation.constraints;

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.ElementType.TYPE_USE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

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

import javax.validation.Constraint;
import javax.validation.Payload;
import javax.validation.constraints.NotNull.List;

/**
 * The annotated element must not be {@code null}.
 * Accepts any type.
 *
 * @author Emmanuel Bernard
 */
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE })
@Retention(RUNTIME)
@Repeatable(List.class)
@Documented
@Constraint(validatedBy = { })
public @interface NotNull {

	String message() default "{javax.validation.constraints.NotNull.message}";

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

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

	/**
	 * Defines several {@link NotNull} annotations on the same element.
	 *
	 * @see javax.validation.constraints.NotNull
	 */
	@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE })
	@Retention(RUNTIME)
	@Documented
	@interface List {

		NotNull[] value();
	}
}

 6. LoginVo 登录

 对电话mobile 和密码password 添加@NotNull 和@IsMobile 注解修饰。

package com.zengjx.miaosha.vo;

import com.zengjx.miaosha.validator.IsMobile;
import org.hibernate.validator.constraints.Length;
import javax.validation.constraints.NotNull;
public class LoginVo {
	@NotNull //是否为空
	@IsMobile //是否是电话号码
	private String mobile;
	@NotNull
	@Length(min=32)//密码长度最小为32位
	private String password;
	public String getMobile() {
		return mobile;
	}
	public void setMobile(String mobile) {
		this.mobile = mobile;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	@Override
	public String toString() {
		return "LoginVo [mobile=" + mobile + ", password=" + password + "]";
	}
}

7.