Scenes

1. click submit button multiple times when network delay
2. refresh page after clicking submit button
3. after submit, click back button to back to previous page and submit again

Solutions

There are two points to prevent duplicating form submission: front-end and back-end.

Front-end

Disable submit button via javascript after clicking it.

Back-end

Use session

1. create a token on the server-side and save it to session
2. send this token to the hidden field of form
3. submit this token together with the form data
4. if this token is not the same as server-side’s or there is no token in the session or there is not token in the form, then this is duplicate submit,
5. otherwise it is normal submit and clear session’s token.

Struts

In struts, there is token interceptor which can be used to handle multiple form submission problem.

References

使用Session防止表单重复提交

防止表单重复提交的方案

Java后台防止客户端重复请求、提交表单

Spring MVC拦截器+注解方式实现防止表单重复提交