Spring Boot 防止重复提交_springboot防重复提交

若依方案

实现思路：

1.将请求的url作为key，参数和时间作为内容存到Redis中；

2.再次发起请求时，根据url查询缓存信息，比较参数和时间；

3.若同一url请求参数相同且在指定时间内，认为它为重复请求，进行拦截。

1.自定义注解

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
 
/**
 * 自定义注解防止表单重复提交
 */
@Inherited
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RepeatSubmit {
    /**
     * 间隔时间(ms)，小于此时间视为重复提交
     */
    public int interval() default 5000;
 
    /**
     * 提示消息
     */
    public String message() default "不允许重复提交，请稍候再试";
}

2.定义防止重复提交的拦截器

import java.lang.reflect.Method;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import com.mcs.repeatsubmit.annotation.RepeatSubmit;
import com.mcs.repeatsubmit.core.AjaxResult;
import com.mcs.repeatsubmit.core.ServletUtils;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import com.alibaba.fastjson2.JSON;
 
/**
 * 防止重复提交拦截器
 *
 * @author ruoyi
 */
@Component
public abstract class RepeatSubmitInterceptor implements HandlerInterceptor {
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (handler instanceof HandlerMethod) {
            HandlerMethod handlerMethod = (HandlerMethod) handler;
            Method method = handlerMethod.getMethod();
            RepeatSubmit annotation = method.getAnnotation(RepeatSubmit.class);
            if (annotation != null) {
                if (this.isRepeatSubmit(request, annotation)) {
                    AjaxResult ajaxResult = AjaxResult.error(annotation.message());
                    ServletUtils.renderString(response, JSON.toJSONString(ajaxResult));
                    return false;
                }
            }
        }
        return true;
    }
 
    /**
     * 验证是否重复提交由子类实现具体的防重复提交的规则
     *
     * @param request
     * @return
     * @throws Exception
     */
    public abstract boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation);
}

3.具体方法实现

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import javax.servlet.http.HttpServletRequest;
 
import com.mcs.repeatsubmit.annotation.RepeatSubmit;
import com.mcs.repeatsubmit.core.CacheConstants;
import com.mcs.repeatsubmit.core.HttpHelper;
import com.mcs.repeatsubmit.core.RedisCache;
import com.mcs.repeatsubmit.filter.RepeatedlyRequestWrapper;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import com.alibaba.fastjson2.JSON;
 
/**
 * 判断请求url和数据是否和上一次相同，
 * 如果和上次相同，则是重复提交表单。 有效时间为10秒内。
 */
@Component
public class SameUrlDataInterceptor extends RepeatSubmitInterceptor {
    public final String REPEAT_PARAMS = "repeatParams";
 
    public final String REPEAT_TIME = "repeatTime";
 
    // 令牌自定义标识
    @Value("${token.header}")
    private String header;
 
    @Autowired
    private RedisCache redisCache;
 
    @SuppressWarnings("unchecked")
    @Override
    public boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation) {
        String nowParams = "";
        if (request instanceof RepeatedlyRequestWrapper) {
            RepeatedlyRequestWrapper repeatedlyRequest = (RepeatedlyRequestWrapper) request;
            nowParams = HttpHelper.getBodyString(repeatedlyRequest);
        }
        // body参数为空，获取Parameter的数据
        if (StringUtils.isEmpty(nowParams)) {
            nowParams = JSON.toJSONString(request.getParameterMap());
        }
 
        Map<String, Object> nowDataMap = new HashMap<String, Object>();
        nowDataMap.put(REPEAT_PARAMS, nowParams);
        nowDataMap.put(REPEAT_TIME, System.currentTimeMillis());
 
        // 请求地址（作为存放cache的key值）
        String url = request.getRequestURI();
 
        // 唯一值（没有消息头则使用请求地址）
        String submitKey = StringUtils.trimToEmpty(request.getHeader(header));
 
        // 唯一标识（指定key + url + 消息头）
        String cacheRepeatKey = CacheConstants.REPEAT_SUBMIT_KEY + url + submitKey;
 
        Object sessionObj = redisCache.getCacheObject(cacheRepeatKey);
        if (sessionObj != null) {
            Map<String, Object> sessionMap = (Map<String, Object>) sessionObj;
            System.out.println(sessionMap);
            if (sessionMap.containsKey(url)) {
                Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
                if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap,
                        annotation.interval())) {
                    return true;
                }
            }
        }
        Map<String, Object> cacheMap = new HashMap<String, Object>();
        cacheMap.put(url, nowDataMap);
        redisCache.setCacheObject(cacheRepeatKey, cacheMap, annotation.interval(), TimeUnit.MILLISECONDS);
        return false;
    }
 
    /**
     * 判断参数是否相同
     */
    private boolean compareParams(Map<String, Object> nowMap, Map<String, Object> preMap) {
        String nowParams = (String) nowMap.get(REPEAT_PARAMS);
        String preParams = (String) preMap.get(REPEAT_PARAMS);
        return nowParams.equals(preParams);
    }
 
    /**
     * 判断两次间隔时间
     */
    private boolean compareTime(Map<String, Object> nowMap, Map<String, Object> preMap, int interval) {
        long time1 = (Long) nowMap.get(REPEAT_TIME);
        long time2 = (Long) preMap.get(REPEAT_TIME);
        if ((time1 - time2) < interval) {
            return true;
        }
        return false;
    }
}

4.添加拦截器

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@Configuration
public class ResourcesConfig implements WebMvcConfigurer {
 
    @Autowired
    private RepeatSubmitInterceptor repeatSubmitInterceptor;
 
    /**
     * 自定义拦截规则
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(repeatSubmitInterceptor).addPathPatterns("/**");
    }
}