java防重提交

通过注解限制 方法规定时间内只能请求一次

@RepeatSubmit(time = 10)

搭配方法 后面加上动态路径 效果更佳

@RequestMapping("/install/{id}")
@ResponseBody

 

 

 RepeatedlyRequestWrapper

package com.platform.client.interceptor;

import com.get.common.core.utils.http.HttpHelper;

import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * 构建可重复读取inputStream的request
 *
 */
public class RepeatedlyRequestWrapper extends HttpServletRequestWrapper
{
    private final byte[] body;

    public RepeatedlyRequestWrapper(HttpServletRequest request, ServletResponse response) throws IOException
    {
        super(request);
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");

        body = HttpHelper.getBodyString(request).getBytes("UTF-8");
    }

    @Override
    public BufferedReader getReader() throws IOException
    {
        return new BufferedReader(new InputStreamReader(getInputStream()));
    }

    @Override
    public ServletInputStream getInputStream() throws IOException
    {
        final ByteArrayInputStream bais = new ByteArrayInputStream(body);
        return new ServletInputStream()
        {
            @Override
            public int read() throws IOException
            {
                return bais.read();
            }

            @Override
            public int available() throws IOException
            {
                return body.length;
            }

            @Override
            public boolean isFinished()
            {
                return false;
            }

            @Override
            public boolean isReady()
            {
                return false;
            }

            @Override
            public void setReadListener(ReadListener readListener)
            {

            }
        };
    }
}

RepeatSubmitInterceptor

package com.platform.client.interceptor;

import com.alibaba.fastjson.JSONObject;
import com.get.common.core.annotation.RepeatSubmit;
import com.get.common.core.utils.ServletUtils;
import com.get.common.core.web.domain.AjaxResult;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;

/**
 * 防止重复提交拦截器
 *
 */
@Component
public abstract class RepeatSubmitInterceptor extends HandlerInterceptorAdapter
{
    @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))
                {
                    AjaxResult ajaxResult = AjaxResult.error("不用着急，稍后再试");
                    ServletUtils.renderString(response, JSONObject.toJSONString(ajaxResult));
                    return false;
                }
            }
            return true;
        }
        else
        {
            return super.preHandle(request, response, handler);
        }
    }

    /**
     * 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);
}

SameUrlDataInterceptor

package com.platform.client.interceptor;

import com.alibaba.fastjson.JSONObject;
import com.get.common.core.constant.CacheConstants;
import com.get.common.core.constant.Constants;
import com.get.common.core.utils.StringUtils;
import com.get.common.core.utils.http.HttpHelper;
import com.get.common.redis.service.Redis1Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 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= CacheConstants.HEADER;

    @Autowired
    private Redis1Service redisCache;

    /**
     * 间隔时间，单位:秒 默认10秒
     *
     * 两次相同参数的请求，如果间隔时间大于该参数，系统不会认定为重复提交的数据
     */
    private int intervalTime = 10;

    public void setIntervalTime(int intervalTime)
    {
        System.out.println("2222222222222222222222222222222222222222222222222222222222222222222222222222");
        this.intervalTime = intervalTime;
    }

    @SuppressWarnings("unchecked")
    @Override
    public boolean isRepeatSubmit(HttpServletRequest request)
    {
        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 = JSONObject.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 = request.getHeader(header);
        if (StringUtils.isEmpty(submitKey))
        {
            submitKey = url;
        }

        // 唯一标识（指定key + 消息头）
        String cacheRepeatKey = Constants.REPEAT_SUBMIT_KEY + submitKey;

        Object sessionObj = redisCache.getCacheObject(cacheRepeatKey);
        if (sessionObj != null)
        {
            Map<String, Object> sessionMap = (Map<String, Object>) sessionObj;
            if (sessionMap.containsKey(url))
            {
                Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
                if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap))
                {
                    return true;
                }
            }
        }
        Map<String, Object> cacheMap = new HashMap<String, Object>();
        cacheMap.put(url, nowDataMap);
        redisCache.setCacheObject(cacheRepeatKey, cacheMap,(long)intervalTime, TimeUnit.SECONDS);
        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)
    {
        long time1 = (Long) nowMap.get(REPEAT_TIME);
        long time2 = (Long) preMap.get(REPEAT_TIME);
        if ((time1 - time2) < (this.intervalTime * 1000))
        {
            return true;
        }
        return false;
    }
}

ResourcesConfig

package com.platform.client.config;

import com.platform.client.interceptor.RepeatSubmitInterceptor;
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;

/**
 * 通用配置
 *
 */
@Configuration
public class ResourcesConfig implements WebMvcConfigurer
{
    @Autowired
    private RepeatSubmitInterceptor repeatSubmitInterceptor;


    /**
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry){
        registry.addInterceptor(repeatSubmitInterceptor).addPathPatterns("/**");
    }
}

RepeatSubmit

package com.get.common.core.annotation;

import java.lang.annotation.*;

/**
 * 自定义注解防止表单重复提交
 * 
 * @author ruoyi
 *
 */
@Inherited
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RepeatSubmit
{

    int time() default 10;
}

jar包

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