如何在 Java 中执行 SQL 插入

Question

我正在尝试使用自动增量主键将数据插入到表中。 我的表结构是这样的：

int:PK 
varchar:Item_ID 
varchar:Item_name 
int:FK_type

当我尝试准备好的语句时：

prep = conn.prepareStatement("insert into Inventory values (?, ?, ?);");

我收到此错误：

Exception in thread "main" java.sql.SQLException: [SQLITE_ERROR] SQL error or missing    database (table Inventory has 4 columns but 3 values were supplied)
    at org.sqlite.DB.newSQLException(DB.java:383)
    at org.sqlite.DB.newSQLException(DB.java:387)
    at org.sqlite.DB.throwex(DB.java:374)
    at org.sqlite.NativeDB.prepare(Native Method)
    at org.sqlite.DB.prepare(DB.java:123)
    at org.sqlite.PrepStmt.<init>(PrepStmt.java:42)
    at org.sqlite.Conn.prepareStatement(Conn.java:404)
    at org.sqlite.Conn.prepareStatement(Conn.java:399)
    at org.sqlite.Conn.prepareStatement(Conn.java:383)
    at org.checkout.CheckInventory.<init>(CheckInventory.java:58)
    at org.checkout.main.main(main.java:18)

当我尝试执行语句时：

stat.executeUpdate("insert into Inventory (Item_ID, Item_name, FK_type ) values ('TP1', 'NX Tripod 1', 2)");

我收到此错误：

java.sql.SQLException: [SQLITE_MISUSE]  Library used incorrectly (out of memory)
    at org.sqlite.DB.newSQLException(DB.java:383)
    at org.sqlite.DB.newSQLException(DB.java:387)
    at org.sqlite.DB.throwex(DB.java:374)
    at org.sqlite.NativeDB._exec(Native Method)
    at org.sqlite.Stmt.executeUpdate(Stmt.java:152)
    at org.checkout.CheckInventory.insertItem(CheckInventory.java:73)
    at org.checkout.CheckInventory$1.actionPerformed(CheckInventory.java:25)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

我究竟做错了什么？

编辑：

当我尝试在语句中添加四列时，出现 [SQLITE_MISUSE] 错误。

这是输入数据的方法

protected static void insertItem() throws Exception {

    stat.execute("insert into Inventory (Item_ID, Item_name, FK_type ) values ('TP1', 'NX Tripod 1', 2)");


}

Answer 1

您的表有四列，您的插入仅插入三个值。 尝试从表中删除一列，或者在插入行时插入四个值。