重复提交拦截器(学习诺依框架)
拦截器我想大家都并不陌生,最常用的登录拦截、或是权限校验、或是防重复提交、或是根据业务校验。
import java.lang.reflect.Method; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Component; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.HandlerInterceptor; import com.ruoyi.common.json.JSON; import com.ruoyi.common.annotation.RepeatSubmit; import com.ruoyi.common.core.domain.AjaxResult; import com.ruoyi.common.utils.ServletUtils; /** * 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.marshal(ajaxResult)); return false; } } return true; } else { 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 请求对象 * @param annotation 防复注解 * @return 结果 */ public abstract boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation) throws Exception; }
import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Component; import com.ruoyi.common.annotation.RepeatSubmit; import com.ruoyi.common.json.JSON; import com.ruoyi.framework.interceptor.RepeatSubmitInterceptor; /** * 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。 * * @author ruoyi */ @Component public class SameUrlDataInterceptor extends RepeatSubmitInterceptor { public final String REPEAT_PARAMS = "repeatParams"; public final String REPEAT_TIME = "repeatTime"; public final String SESSION_REPEAT_KEY = "repeatData"; @SuppressWarnings("unchecked") @Override public boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation) throws Exception { // 本次参数及系统时间 String nowParams = JSON.marshal(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session的key值) String url = request.getRequestURI(); HttpSession session = request.getSession(); Object sessionObj = session.getAttribute(SESSION_REPEAT_KEY); 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, annotation.interval())) { return true; } } } Map<String, Object> sessionMap = new HashMap<String, Object>(); sessionMap.put(url, nowDataMap); session.setAttribute(SESSION_REPEAT_KEY, sessionMap); 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; } }
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; import com.ruoyi.common.config.RuoYiConfig; import com.ruoyi.common.constant.Constants; import com.ruoyi.framework.interceptor.RepeatSubmitInterceptor; /** * 通用配置 * * @author ruoyi */ @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("/**"); } }