An embedded browser address error when eclipse runs the servlet--a workaround for adding a package path

Such as

After repeated attempts, finally solved the problem, and successfully reproduced.

The reason is that the servlet name is too long: ServletConfigDemo1, causing Eclipse's auto-generated <servlet-class> in Web. Xml to wrap, like this.

And the normal <servlet-class> is like this

This does not see any difference in the Eclipse XML editor, but it does affect the browser address.

The solution is to remove the newline in the TXT editor.

An embedded browser address error when eclipse runs the servlet--a workaround for adding a package path