// 向table添加listener，使之可以多行显示
        Listener paintListener = new Listener() {
            public void handleEvent(Event event) {
                switch(event.type) {        
                    case SWT.MeasureItem: {
                        TableItem item = (TableItem)event.item;
                        String text = getText(item, event.index);
                        Point size = event.gc.textExtent(text);
                        event.width = size.x;
                        event.height = Math.max(event.height, size.y);
                        break;
                    }
                    case SWT.PaintItem: {
                        TableItem item = (TableItem)event.item;
                        String text = getText(item, event.index);
                        Point size = event.gc.textExtent(text);                    
                        int offset2 = event.index == 0 ? Math.max(0, (event.height - size.y) / 2) : 0;
                        event.gc.drawText(text, event.x, event.y + offset2, true);
                        break;
                    }
                    case SWT.EraseItem: {    
                        event.detail &= ~SWT.FOREGROUND;
                        break;
                    }
                }
            }
            String getText(TableItem item, int column) {
                return item.getText(column);
            }
        };
       table.addListener(SWT.MeasureItem, paintListener);
       table.addListener(SWT.PaintItem, paintListener);
       table.addListener(SWT.EraseItem, paintListener);

2. 换行要自己加个“\n”到字符串中，如

  TableItem item = new TableItem(table, SWT.NONE, table.getItemCount());
  item.setText("first line" + "\n" + "second line");