Eclipse -以编程方式突出显示编辑器的多行

import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.PlatformUI;

public void highlightLines(int startLine, int endLine) {
    IEditorPart editor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
    if (editor instanceof ISourceViewer) {
        ISourceViewer sourceViewer = (ISourceViewer) editor;
        ITextViewer textViewer = sourceViewer.getTextWidget();
        IDocument document = sourceViewer.getDocument();

        try {
            int startOffset = document.getLineOffset(startLine - 1);
            int endOffset = document.getLineOffset(endLine) - 1;
            textViewer.setSelection(new org.eclipse.jface.text.Region(startOffset, endOffset - startOffset));
            textViewer.showSelection();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}