Java Web error: GET http://localhost:8080/(project name/...) 404 (Not Found)

Error message: GET http://localhost:8080/(project name/......) 404 (Not Found)

In addition to reporting errors in the title, the original normal documents report errors.

Solution: window->Preferences->Java->Installed JREs, see if it has changed. After the change, click on the JRE System Library, you will find that the jar package used is different.

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Origin blog.csdn.net/wb_it_man/article/details/113247155