My article is a combination of many articles, you can solve your problem, I believe you have seen to see your version number,
first check your version number, click on about Eclipse IDE in help
record their own version, note that version No. 2019-03 does not contain something back!
Under help insert software
online is a lot of articles 2019-03 - http://download.eclipse.org/releases/2019-03
but the site is mirrored abroad, so the progress bar does not move,
details, please read this article https: //blog.csdn.net/cblstc/article/details/83188826
install plug-ins to the web plug, for example
Help -> install new new Software
Work with -> choose http://mirror.bit.edu.cn/eclipse/releases/ 2018-09
select Web, XML, and Java EE ...
next -> next ...
and the next is finished.
setting encoding format:
windows-> Preferences-> General-> Workspace: select UTF-8 in others
Also modify the coding format in the web-> jsp.file as utf-8:
