Shulou(Shulou.com)06/02 Report--

This article introduces the knowledge about "Java's methods to prevent duplicate data submission." In the actual case operation process, many people will encounter such difficulties. Next, let Xiaobian lead you to learn how to deal with these situations! I hope you can read carefully and learn something!

Simulate user scenarios

According to the feedback from friends, the approximate scene is as follows:

The simplified simulation code is as follows (based on Spring Boot):

import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RequestMapping("/user") @RestController public class UserController { /** * Repeatedly requested methods */ @RequestMapping("/add") public String addUser(String id) { //Business Code... System.out.println("Add User ID:" + id); return "Execution successful! "; } }

So Lei brother thought: through the front and back end interception respectively to solve the problem of repeated data submission.

front-end interception

Front-end interception is the interception of repeated requests through HTML pages, such as after the user clicks the "submit" button, we can set the button to unavailable or hidden state.

The execution effect is shown in the following figure:

Implementation code for front-end interception:

function subCli(){ //button set to unavailable document.getElementById("btn_sub").disabled="disabled"; document.getElementById("dv1").innerText = "Button clicked ~"; }

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