Ask questions and try to provide complete code , Environment description , The more conducive to the recurrence of the problem , The faster your question can be answered .
Have questions about the code in the tutorial , Please provide which step , Which line is in doubt , This makes it easy to quickly locate the problem , Improve the speed at which questions are answered
In the thousands of questions that already exist , A considerable proportion , Because of the use of and webmaster Different versions of the development environment Resulting in , For example jdk, eclpise, idea, mysql,tomcat Wait, the version of the software is inconsistent .
Please use the same version as the webmaster , You can save yourself a lot of learning time . The webmaster sorted out the software versions used in teaching , It's all here , Convenient for everyone to download ： /k/helloworld/helloworld-version/1718.html