我的數據庫有兩列。一列是自動增量id(Primary Key)
,另一列是'Sentence'
列。手動輸入一些東西,我可以插入該值。但是當我試圖插入變量值,給出錯誤信息。我嘗試了不同的方式。 ('?') /(?)/(?)
沒有爲我工作。以下sql代碼的原因是什麼,無法插入數據?
int s1=9;
String s2="Kasuni";
String sql = "INSERT INTO sentences (Sentence) VALUES (?)";
PreparedStatement pstmtJ = conn.prepareStatement(sql);
//pstmtJ.setInt(1, s1);
pstmtJ.setString(1,s2);
pstmtJ.executeUpdate(sql);
第一個值我沒有插入,因爲那是自動遞增值。我只是評論,並在我的上述代碼中顯示。
錯誤消息:
Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?)' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2642)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1647)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1566)
at TestJsoup.main(TestJsoup.java:66)
當我特林下面的代碼:
int s1=9;
String s2="Kasuni";
String sql = "INSERT INTO sentences (Sentence) VALUES ('?')";
PreparedStatement pstmtJ = conn.prepareStatement(sql);
//pstmtJ.setInt(1, s1);
pstmtJ.setString(1,s2);
pstmtJ.executeUpdate(sql);
這給了以下錯誤消息:→你發送原始
Exception in thread "main" java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
at com.mysql.jdbc.PreparedStatement.checkBounds(PreparedStatement.java:3646)
at com.mysql.jdbc.PreparedStatement.setInternal(PreparedStatement.java:3630)
at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:4481)
at TestJsoup.main(TestJsoup.java:65)
:d是的,這是爲我工作。感謝很多。我嘗試了很多。再次感謝。祝你今天愉快 :) 。 – Maduri 2014-11-23 04:22:06