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//获取焦点
tableViewer.getControl().setFocus();
//tab键编辑
TableViewerEditor.create(tableViewer, new ColumnViewerEditorActivationStrategy(tableViewer), ColumnViewerEditor.TABBING_HORIZONTAL|ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR|ColumnViewerEditor.TABBING_VERTICAL);
//tab键弹出下拉框
((ComboBoxCellEditor) editor).setActivationStyle(ComboBoxCellEditor.DROP_DOWN_ON_TRAVERSE_ACTIVATION |
ComboBoxCellEditor.DROP_DOWN_ON_PROGRAMMATIC_ACTIVATION |
ComboBoxCellEditor.DROP_DOWN_ON_MOUSE_ACTIVATION |
ComboBoxCellEditor.DROP_DOWN_ON_KEY_ACTIVATION);