1.
Properties > Validation
you have two options:
- Configure Workspace Settings (disable the validation for the current workspace)
uncheck the manual and build for:XML Schema Validator,XML Validator
- Check enable project specific settings (disable the validation for this project)
uncheck the manual and build for:XML Schema Validator,XML Validator
- Right-click on the project and select Validate to make the errors disappear
2.
Window > Preferences > Validation > uncheck XML Validator Manual and Build
转载：http://stackoverflow.com/questions/7489510/disable-xml-validation-in-eclipse
