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This article mainly introduces "how to solve the common problems of the ordering system in WeChat Mini Programs". In the daily operation, I believe that many people have doubts about how to solve the common problems of the ordering system in WeChat Mini Programs. The editor consulted all kinds of materials and sorted out the simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "how to solve the common problems of the ordering system in WeChat Mini Programs". Next, please follow the editor to study!

Issues related to java background

One, the package lombok does not exist

This error is usually reported because our developer tool idea does not install the lombok library

The solution is as follows:

Prompt us not to install it, we will just install one. Let's teach you how to install it.

1, click the wrench to enter the settings page

2, click plugins, then search lombok, click install to install

3. After the installation is complete, restart the idea development tools

Second, unable to execute sql file, IDEA 2019.1 connection database error (08001)

Linking to the mysql database reported the following error

08001 could not connection to database server

Or the qcl.sql file cannot be executed, as shown in the following figure

The reason for this error is actually the wrong version of the IDEA connection database driver. The previous IDEA used version 5.1.47, so there is no problem. The 2019.1.1 version of IDEA uses 8.0.15 by default, so it cannot connect to the database. Just change the version back to 5.1.47 to solve this problem.

Solution:

Remove the default mysql driver and reselect 5.1.47, as shown below.

Don't forget to click apply or ok

At this point, the study on "how to solve common problems in WeChat Mini Programs's ordering system" is over. I hope to be able to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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