调用EditorPart的doSaveAs比较容易，调用doSave方法稍微复杂一些，因为需要传入IProgressMonitor参数，如下声明

@Override
	public void doSave(IProgressMonitor monitor) {
		// Do the Save operation
	}

	@Override
	public void doSaveAs() {
		// Do the Save As operation
	}

IWorkbenchPage.closeEditor声明如下。

/**
	 * Closes the given editor. The editor must belong to this workbench page.
	 * <p>
	 * If the editor has unsaved content and <code>save</code> is
	 * <code>true</code>, the user will be given the opportunity to save it.
	 * </p>
	 * 
	 * @param editor
	 *            the editor to close
	 * @param save
	 *            <code>true</code> to save the editor contents if required
	 *            (recommended), and <code>false</code> to discard any unsaved
	 *            changes
	 * @return <code>true</code> if the editor was successfully closed, and
	 *         <code>false</code> if the editor is still open
	 */
	public boolean closeEditor(IEditorPart editor, boolean save);

IWorkbenchPage page = Activator.getDefault().getWorkbench().getActiveWorkbenchWindow().getActivePage();
		page.closeEditor(page.getActiveEditor(), true);