java replaceAll [ ] character issue
ArrayList item, do somethine....... String ori_txt = item.toString().trim(); 最後把 item.toString() 轉成字串後. 會多出數個字元: ex: [所在縣市,醫院名稱,編號,醫院評鑑結果,教學醫院評鑑結果,醫院評鑑合格效期,教學醫院合格效期,醫院電話,地址] 要把 [, ] 兩字元移除 ori_txt=ori_txt.replaceAll("\n", ""); ori_txt=ori_txt.replaceAll("[", ""); ori_txt=ori_txt.replaceAll("]", ""); 但出現error: Caused by: java.util.regex.PatternSyntaxException: Missing closing bracket in character class near index 1: [ 原來是[字元要跳脫.. 因為這欄位本來是放 RegExp pattern是以[ ]開頭與結尾. 要用\\[ 與\\] 才可. 改成: String ori_txt = item.toString().trim(); ori_txt = ori_txt.replaceAll("\n", ""); ori_txt = ori_txt.replaceAll(" \\ [", ""); ori_txt = ori_txt.replaceAll(" \\ ]", ""); 完成!