https://zhidao.baidu.com/question/1988521414588961107.html
There are three solutions:
1. Before importing the project, please confirm that the workspace encoding has been set to utf-8
window->Preferences->General->Wrokspace->Text file encoding->Other select UTF-8
2. After importing, due to The names of JRE and Tomcat Library in the development environment may be inconsistent with those in the source code, and a Build Path error may occur. The solution is as follows:
Right-click project->Build Path->Configure Build Path->Select the Libraries tab->Delete the small Red Cross Library->Click Add Library->Select JRE System Library (if Tomcat Library is deleted, select Server Runtime)->After selecting a JRE->Finish
3. Enter the .settings directory under the project package and find org.eclipse .wst.common.project.facet.core.xml file, open it with Notepad and check "runtime name="Apache Tomcat v6.0"/" to see if it is consistent with the tomcat version set by your eclipse, if not, delete it This content can be