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关于Sql语句出错检查在写查询语句等时常会用到，手一滑就写错，还眼花from – form在sql动态拼接时StringBuffer sql = new StringBuffer();sql.append("select count(1) as count from smbms_user u ,smbms_role r where u.userRole = r.id");ArrayList<Object> list = new ArrayList<>();//用来存放参数