HttpServletRequest
对象,并记录请求的地址、请求方式、拦截到的类名和方法名等信息。pjp.getArgs()
获取请求参数,并将参数转换成字符串,用于生成唯一标识。cacheRepeatKey
,用于作为重复提交判断的依据。pjp.getSignature().getMethod()
和 method.getAnnotation(PreventRepeatSubmit.class)
获取被拦截的方法上的 PreventRepeatSubmit
注解,进而获取注解中配置的有效期时间。redisCache.setNxCacheObject()
方法,尝试向缓存中设置键值对,如果设置成功(返回值为 true
),则证明没有重复提交。若设置失败(返回值为 false
),则抛出 BusinessException
异常,表示重复提交。pjp.proceed()
,并将其返回。
org.springframework.boot
spring-boot-starter-aop
com.baomidou
mybatis-plus-boot-starter
3.5.1
org.springframework.boot
spring-boot-starter-data-redis
org.springframework.amqp
spring-rabbit-test
test
mysql
mysql-connector-java
${mysql.version}
com.alibaba
fastjson
1.2.47
server.port=7125
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/itcast?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
spring.datasource.username=root
spring.datasource.password=root123
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.hikari.pool-name=HikariCPDatasource
spring.datasource.hikari.minimum-idle=5
spring.datasource.hikari.idle-timeout=180000
spring.datasource.hikari.maximum-pool-size=10
spring.datasource.hikari.auto-commit=true
spring.datasource.hikari.max-lifetime=1800000
spring.datasource.hikari.connection-timeout=30000
spring.datasource.hikari.connection-test-query=SELECT 1
spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.timeout=10s
spring.redis.password=123
token.header=token
import java.lang.annotation.*;
/**
* 自定义注解防止表单重复提交
*
*/
@Inherited
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface PreventRepeatSubmit
{
/**
* 间隔时间(ms),小于此时间视为重复提交
*/
public int interval() default 40;
/**
* 提示消息
*/
public String message() default "不允许重复提交,请稍候再试";
}
import com.alibaba.fastjson.JSON;
import com.example.demo.annotation.PreventRepeatSubmit;
import com.example.demo.exception.BusinessException;
import com.example.demo.util.HttpCodeEnum;
import com.example.demo.util.RedisCache;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.concurrent.TimeUnit;
@Aspect
@Component
public class PreventRepeatSubmitAspect {
private static final Logger LOG = LoggerFactory.getLogger(PreventRepeatSubmitAspect.class);
// 令牌自定义标识
@Value("${token.header}")
private String header;
@Autowired
private RedisCache redisCache;
// 定义一个切入点
@Pointcut("@annotation(com.example.demo.annotation.PreventRepeatSubmit)")
public void preventRepeatSubmit() {
}
@Around("preventRepeatSubmit()")
public Object checkPrs(ProceedingJoinPoint pjp) throws Throwable {
LOG.info("进入preventRepeatSubmit切面");
//得到request对象
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
String requestURI = request.getRequestURI();
LOG.info("防重复提交的请求地址:{} ,请求方式:{}",requestURI,request.getMethod());
LOG.info("防重复提交拦截到的类名:{} ,方法:{}",pjp.getTarget().getClass().getSimpleName(),pjp.getSignature().getName());
//获取请求参数
Object[] args = pjp.getArgs();
String argStr = JSON.toJSONString(args);
//这里替换是为了在redis可视化工具中方便查看
argStr=argStr.replace(":","#");
// 唯一值(没有消息头则使用请求地址)
String submitKey = request.getHeader(header).trim();
// 唯一标识(指定key + url +参数+token)
String cacheRepeatKey = "repeat_submit:" + requestURI+":" +argStr+":"+ submitKey;
MethodSignature ms = (MethodSignature) pjp.getSignature();
Method method=ms.getMethod();
PreventRepeatSubmit preventRepeatSubmit=method.getAnnotation(PreventRepeatSubmit.class);
int interval = preventRepeatSubmit.interval();
LOG.info("获取到preventRepeatSubmit的有效期时间"+interval);
//redis分布式锁
Boolean aBoolean = redisCache.setNxCacheObject(cacheRepeatKey, 1, preventRepeatSubmit.interval(), TimeUnit.SECONDS);
//aBoolean为true则证明没有重复提交
if(!aBoolean){
//JSON.toJSONString(ResponseResult.errorResult(HttpCodeEnum.SYSTEM_ERROR.getCode(),annotation.message())));
throw new BusinessException(HttpCodeEnum.REPEATE_ERROR);
}
return pjp.proceed();
}
}
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import java.util.*;
import java.util.concurrent.TimeUnit;
/**
* spring redis 工具类
*
**/
@Component
public class RedisCache
{
@Autowired
public RedisTemplate redisTemplate;
//添加分布式锁
public Boolean setNxCacheObject(final String key, final T value,long lt,TimeUnit tu)
{
return redisTemplate.opsForValue().setIfAbsent(key,value,lt,tu);
}
/**
* 缓存基本的对象,Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
*/
public void setCacheObject(final String key, final T value)
{
redisTemplate.opsForValue().set(key, value);
}
/**
* 缓存基本的对象,Integer、String、实体类等
*
* @param key 缓存的键值
* @param value 缓存的值
* @param timeout 时间
* @param timeUnit 时间颗粒度
*/
public void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit)
{
redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @return true=设置成功;false=设置失败
*/
public boolean expire(final String key, final long timeout)
{
return expire(key, timeout, TimeUnit.SECONDS);
}
/**
* 设置有效时间
*
* @param key Redis键
* @param timeout 超时时间
* @param unit 时间单位
* @return true=设置成功;false=设置失败
*/
public boolean expire(final String key, final long timeout, final TimeUnit unit)
{
return redisTemplate.expire(key, timeout, unit);
}
/**
* 获取有效时间
*
* @param key Redis键
* @return 有效时间
*/
public long getExpire(final String key)
{
return redisTemplate.getExpire(key);
}
/**
* 判断 key是否存在
*
* @param key 键
* @return true 存在 false不存在
*/
public Boolean hasKey(String key)
{
return redisTemplate.hasKey(key);
}
/**
* 获得缓存的基本对象。
*
* @param key 缓存键值
* @return 缓存键值对应的数据
*/
public T getCacheObject(final String key)
{
ValueOperations operation = redisTemplate.opsForValue();
return operation.get(key);
}
/**
* 删除单个对象
*
* @param key
*/
public boolean deleteObject(final String key)
{
return redisTemplate.delete(key);
}
/**
* 删除集合对象
*
* @param collection 多个对象
* @return
*/
public boolean deleteObject(final Collection collection)
{
return redisTemplate.delete(collection) > 0;
}
/**
* 缓存List数据
*
* @param key 缓存的键值
* @param dataList 待缓存的List数据
* @return 缓存的对象
*/
public long setCacheList(final String key, final List dataList)
{
Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
return count == null ? 0 : count;
}
/**
* 获得缓存的list对象
*
* @param key 缓存的键值
* @return 缓存键值对应的数据
*/
public List getCacheList(final String key)
{
return redisTemplate.opsForList().range(key, 0, -1);
}
/**
* 缓存Set
*
* @param key 缓存键值
* @param dataSet 缓存的数据
* @return 缓存数据的对象
*/
public BoundSetOperations setCacheSet(final String key, final Set dataSet)
{
BoundSetOperations setOperation = redisTemplate.boundSetOps(key);
Iterator it = dataSet.iterator();
while (it.hasNext())
{
setOperation.add(it.next());
}
return setOperation;
}
/**
* 获得缓存的set
*
* @param key
* @return
*/
public Set getCacheSet(final String key)
{
return redisTemplate.opsForSet().members(key);
}
/**
* 缓存Map
*
* @param key
* @param dataMap
*/
public void setCacheMap(final String key, final Map dataMap)
{
if (dataMap != null) {
redisTemplate.opsForHash().putAll(key, dataMap);
}
}
/**
* 获得缓存的Map
*
* @param key
* @return
*/
public Map getCacheMap(final String key)
{
return redisTemplate.opsForHash().entries(key);
}
/**
* 往Hash中存入数据
*
* @param key Redis键
* @param hKey Hash键
* @param value 值
*/
public void setCacheMapValue(final String key, final String hKey, final T value)
{
redisTemplate.opsForHash().put(key, hKey, value);
}
/**
* 获取Hash中的数据
*
* @param key Redis键
* @param hKey Hash键
* @return Hash中的对象
*/
public T getCacheMapValue(final String key, final String hKey)
{
HashOperations opsForHash = redisTemplate.opsForHash();
return opsForHash.get(key, hKey);
}
/**
* 获取多个Hash中的数据
*
* @param key Redis键
* @param hKeys Hash键集合
* @return Hash对象集合
*/
public List getMultiCacheMapValue(final String key, final Collection
import com.example.demo.annotation.PreventRepeatSubmit;
import com.example.demo.mapper.StuMapper;
import com.example.demo.model.ResponseResult;
import com.example.demo.model.Student;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
@RestController
@RequestMapping("/test")
@Validated
public class TestController {
@Resource
private StuMapper stuMapper;
@PostMapping("/user")
@PreventRepeatSubmit
public ResponseResult user(@RequestBody Student student) {
stuMapper.insert(student);
return new ResponseResult<>("插入成功");
}
// @PostMapping("/user/{name}/{age}")
// @PreventRepeatSubmit
// public ResponseResult user( @PathVariable String name ,@PathVariable Integer age) {
// Student student = new Student(name,age);
// stuMapper.insert(student);
// return new ResponseResult<>("插入成功");
// }
}
发送请求的请求头
请求体
第二次插入失败
redis缓存
改用restful风格
第一次请求
结果
第二次发起请求失败