【android學習筆記】ormlite學習之模糊搜尋like
阿新 • • 發佈:2018-12-14
【目標】實現表中多個欄位模糊搜尋。
【方法】ormlite like
方法 :like(columnName,pattern) 使用%萬用字元來匹配,指定行資料,返回匹配到的結果 使用示範:mDao.queryBuilder().where().like("LastName", "A%").query(); 匹配A開頭的LastName mDao.queryBuilder().where().like("LastName", “%s").query(); 匹配s結尾的LastName mDao.queryBuilder().where().like("LastName", “%art%").query(); 匹配中間為art的LastName 對應SQL:SELECT * FROM `t_person` WHERE `LastName` LIKE 'A%'
【程式碼】查詢與“孫”相關的資料。
Dao<Cashbook,Integer> cashDao=getCash(); //.or().like("month","%"+keys+"%").or().like("money","%"+keys+"%").or().like("payer","%"+keys+"%").or().like("way","%"+keys+"%") List<Cashbook> mdatas= cashDao.queryBuilder().where().like("client", "%"+keys+"%").or().like("month","'%"+keys+"%'").or().like("money","'%"+keys+"%'").or().like("payer","'%"+keys+"%'").or().like("way","%"+keys+"%").query(); for(Cashbook cashbook:mdatas){ String isIncome; if(cashbook.getIncome()==0){ isIncome="支出"; }else{ isIncome="收入"; } codeList.add(new TableCashData(cashbook.getPayer(),cashbook.getPayee(),cashbook.getClient(),cashbook.getMonth(),cashbook.getMoney(),cashbook.getWay(),cashbook.getRemark(),isIncome,cashbook.getDate(),false)); } initColumn();
【報錯】“no such column :孫”,把關鍵字認作“列名”了,不知為何!(應該不是這麼拼的吧)
10-07 16:28:37.812 27355-27355/menu.bottombar.bottombar E/SQLiteLog: (1) no such column: 孫 10-07 16:28:37.826 27355-27355/menu.bottombar.bottombar W/System.err: java.sql.SQLException: Problems executing Android query: SELECT * FROM `tb_crashbook` WHERE ((((`client` LIKE '%孫%' OR `month` LIKE '%孫%' ) OR `money` LIKE '%孫%' ) OR `payer` LIKE ''%孫%'' ) OR `way` LIKE '%孫%' ) 10-07 16:28:37.827 27355-27355/menu.bottombar.bottombar W/System.err: at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) at com.j256.ormlite.android.AndroidCompiledStatement.getCursor(AndroidCompiledStatement.java:184) at com.j256.ormlite.android.AndroidCompiledStatement.runQuery(AndroidCompiledStatement.java:65) at com.j256.ormlite.stmt.SelectIterator.<init>(SelectIterator.java:55) at com.j256.ormlite.stmt.StatementExecutor.buildIterator(StatementExecutor.java:247) at com.j256.ormlite.stmt.StatementExecutor.query(StatementExecutor.java:196) at com.j256.ormlite.dao.BaseDaoImpl.query(BaseDaoImpl.java:265) at com.j256.ormlite.stmt.QueryBuilder.query(QueryBuilder.java:361) at com.j256.ormlite.stmt.Where.query(Where.java:503) at menu.bottombar.bottombar.Activity.CashbookActivity$OrmLiteTest.searchKeys(CashbookActivity.java:318) at menu.bottombar.bottombar.Activity.CashbookActivity.searchKeywords(CashbookActivity.java:145) at menu.bottombar.bottombar.Activity.CashbookActivity.access$300(CashbookActivity.java:39) at menu.bottombar.bottombar.Activity.CashbookActivity$3$1.onClick(CashbookActivity.java:122) at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:176) at android.os.Handler.dispatchMessage(Handler.java:102)
【解決辦法】
仔細觀察報錯語句:SELECT * FROM `tb_crashbook` WHERE ((((`client` LIKE '%孫%' OR `month` LIKE '%孫%' ) OR `money` LIKE '%孫%' ) OR `payer` LIKE ''%孫%'' ) OR `way` LIKE '%孫%' ) ,出現了兩個“ ' ”符號,手動去掉語句首尾的即可,未弄清原因。
List<Cashbook> mdatas= cashDao.queryBuilder().where().like("client", "%"+keys+"%").or().like("month","'%"+keys+"%'").or().like("money","'%"+keys+"%'").or().like("payer","%"+keys+"%").query();
還請各位指點!