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sheet.setColumnWidth(i, (int)(title.getBytes().length * 1.2d * 256 > 12 * 256 ? title.getBytes().length * 1.2d * 256 : 12 * 256));

//256Ϊµ¥¸ö×Ö·ûËùÕ¼µÄ¿í¶È

//1.2d±íʾ±Èʵ¼Ê¿í¶È´ó20%

//12*256±íʾ×îµÍ¿í¶ÈΪ12¸ö×Ö·û

תÔØÓÚ:https://www.cnblogs.com/CR1me/p/9874983.html