SpringBoot自定义注解防止表单重复提交

1. 首先定义注解

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
 * 
 * @author webserver
 *
 */
@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. 实现 servlet 拦截器

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.alibaba.fastjson2.JSON;
import com.test.common.annotation.RepeatSubmit;
import com.test.common.core.domain.AjaxResult;


/**
 * 防止重复提交拦截器
 *
 * @author webserver
 */
@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());
                    try
                    {
                        response.setStatus(200);
                        response.setContentType("application/json");
                        response.setCharacterEncoding("utf-8");
                        response.getWriter().print(JSON.toJSONString(ajaxResult));
                    }
                    catch (IOException e)
                    {
                        e.printStackTrace();
                    }
                    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
     * @return
     * @throws Exception
     */
    public abstract boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation);
}

3. 使用示例

在接口方法上添加@RepeatSubmit注解即可，注解参数说明：

interval 指定间隔毫秒时间，连续请求小于此时间视为重复提交。默认间隔时间5000毫秒。

@RepeatSubmit(interval = 1000, message = "请求过于频繁")
public AjaxResult addSave(...)
{
    return success(...);
}

代码007普通

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