Java 如何使用prepareStatement（）？
当id是我的SQL表的键并且它将由SQL创建时，我使用prepareStatement（），我想使用以下语句：（我应该在SQL表的第一列中写什么而不是X（提示：SQL自动创建它） 我已经照你们说的做了 但我有一个例外Java 如何使用prepareStatement（）？,java,sql,jdbc,Java,Sql,Jdbc,当id是我的SQL表的键并且它将由SQL创建时，我使用prepareStatement（），我想使用以下语句：（我应该在SQL表的第一列中写什么而不是X（提示：SQL自动创建它） 我已经照你们说的做了 但我有一个例外 java.sql.SQLException: Column count doesn't match value count at row 1 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
java.sql.SQLException: Column count doesn't match value count at row 1
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2019)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1937)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1922)
at database.Manager.addBirth(Manager.java:76)
at AdminGUI.AddNewBornInformation.submit(AddNewBornInformation.java:358)
at AdminGUI.AddNewBornInformation.setButtonActionPerformed(AddNewBornInformation.java:282)
at AdminGUI.AddNewBornInformation.access$800(AddNewBornInformation.java:28)
at AdminGUI.AddNewBornInformation$9.actionPerformed(AddNewBornInformation.java:139)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
如果已将该列的类型指定为int和auto increment，例如
`ID` int(10) unsigned NOT NULL AUTO_INCREMENT,
query = ("insert into birthtable (nameCol, familyCol, fatherNameCol, mNameCol, dOfBirthCol, pOfBirthCol, inputCol) VALUES(?,?,?,?,?,?,?)");
pstmt = (PreparedStatement) conn.prepareStatement(query);
pstmt.setString(1, name);
pstmt.setString(2, family);
pstmt.setString(3, fatherName);
pstmt.setString(4, mName);
pstmt.setString(5, dOfBirth);
pstmt.setString(6, pOfBirth);
// Method used to insert a stream of bytes
pstmt.setBinaryStream(7, input);
请注意，正如其他人所说，您必须包括列名，无论它们是什么。如果您已将该列的类型指定为int和auto increment，例如
`ID` int(10) unsigned NOT NULL AUTO_INCREMENT,
query = ("insert into birthtable (nameCol, familyCol, fatherNameCol, mNameCol, dOfBirthCol, pOfBirthCol, inputCol) VALUES(?,?,?,?,?,?,?)");
pstmt = (PreparedStatement) conn.prepareStatement(query);
pstmt.setString(1, name);
pstmt.setString(2, family);
pstmt.setString(3, fatherName);
pstmt.setString(4, mName);
pstmt.setString(5, dOfBirth);
pstmt.setString(6, pOfBirth);
// Method used to insert a stream of bytes
pstmt.setBinaryStream(7, input);
请注意，正如其他人所说，您必须包括列名，不管它们是什么。如果您使用的是自动递增且列名有效，则在准备好的语句中不设置id参数：
query = ("insert into birthtable (name, family, fatherName, mName, dOfBirth, pOfBirth, input) VALUES(?,?,?,?,?,?,?)");
pstmt = conn.prepareStatement(query);
pstmt.setString(1, name);
pstmt.setString(2, family);
pstmt.setString(3, fatherName);
pstmt.setString(4, mName);
pstmt.setString(5, dOfBirth);
pstmt.setString(6, pOfBirth);
pstmt.setBinaryStream(7, input);
应明确说明列名，否则取决于表create语句中的顺序。如果使用的是自动递增且列名有效，则不在准备好的语句中设置id参数：
query = ("insert into birthtable (name, family, fatherName, mName, dOfBirth, pOfBirth, input) VALUES(?,?,?,?,?,?,?)");
pstmt = conn.prepareStatement(query);
pstmt.setString(1, name);
pstmt.setString(2, family);
pstmt.setString(3, fatherName);
pstmt.setString(4, mName);
pstmt.setString(5, dOfBirth);
pstmt.setString(6, pOfBirth);
pstmt.setBinaryStream(7, input);
您应该明确说明列名，否则您将取决于表create语句中的顺序。您不需要自己指定列名，因此可以不指定列名。但是，您应该自己指定列，例如
"INSERT INTO tablename (columnname1, columnname2, columnname3) VALUES (?, ?, ?);"
否则，数据库将不知道在何处插入值，因为缺少一列。您不需要自己指定它，所以您可以将其保留。但是，您应该自己指定列，例如
"INSERT INTO tablename (columnname1, columnname2, columnname3) VALUES (?, ?, ?);"
否则，数据库将不知道在何处插入值，因为缺少一列。我仅有的两分钱是，如果您需要生成的ID，可以调用
pstmt.getGeneratedKeys( );
不过，它是否返回任何有效的内容取决于您的JDBC驱动程序实现。我只需要2美分，如果您需要生成的ID，您可以调用
pstmt.getGeneratedKeys( );
但是，它是否返回任何有效的内容取决于您的JDBC驱动程序实现。我们有8个问号，然后我从1开始，那么8个问号的值在哪里？您需要删除一个-因此将只有7个问号。我们有8个问号，然后我从1开始，那么8个问号的值在哪里？您需要删除吗ed删除一个-因此只有七个您不应该执行的操作
（PreparedStatement）（PreparedStatement）