为啥我收到此错误 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column in 'sdate' 'field

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【中文标题】为啥我收到此错误 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column in \'sdate\' \'field list\'【英文标题】:Why i am getting this error com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column in 'sdate' 'field list'为什么我收到此错误 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column in 'sdate' 'field list' 【发布时间】:2016-09-18 05:59:00 【问题描述】:

我正在我的项目中使用 Java swing、JDBC 和 mysql 数据库制作一个小型库存管理项目。我有三个按钮,“购买”、“销售”和“清除”。如果我点击购买按钮,它会通过添加产品名称、价格、数量等来更新我的“产品、购买”表。购买按钮工作正常,但销售按钮不工作。

这是我的项目视图:

当我点击我的销售按钮时,它给了我这个例外:

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:“字段列表”中的未知列“sdate” 在 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 在 sun.reflect.NativeConstructorAccessorImpl.newInstance(未知来源) 在 sun.reflect.DelegatingConstructorAccessorImpl.newInstance(未知来源) 在 java.lang.reflect.Constructor.newInstance(Unknown Source)

在 com.mysql.jdbc.Util.handleNewInstance(Util.java:404) 在 com.mysql.jdbc.Util.getInstance(Util.java:387) 在 com.mysql.jdbc.SQLError.createSQLException(SQLError.java:942) 在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966) 在 com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902) 在 com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2526) 在 com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2673) 在 com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2549) 在 com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861) 在 com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1192) 在 com.mysql.jdbc.CallableStatement.execute(CallableStatement.java:823) 在 com.imp.ProductController.SaveSale(ProductController.java:76) 在 com.imp.Inventory$3.actionPerformed(Inventory.java:154)

在 javax.swing.AbstractButton.fireActionPerformed(未知来源) 在 javax.swing.AbstractButton$Handler.actionPerformed(未知来源) 在 javax.swing.DefaultButtonModel.fireActionPerformed(未知来源) 在 javax.swing.DefaultButtonModel.setPressed(未知来源) 在 javax.swing.plaf.basic.BasicButtonListener.mouseReleased(未知来源) 在 java.awt.Component.processMouseEvent(未知来源) 在 javax.swing.JComponent.processMouseEvent(未知来源) 在 java.awt.Component.processEvent(未知来源) 在 java.awt.Container.processEvent(未知来源) 在 java.awt.Component.dispatchEventImpl(未知来源) 在 java.awt.Container.dispatchEventImpl(未知来源) 在 java.awt.Component.dispatchEvent(未知来源) 在 java.awt.LightweightDispatcher.retargetMouseEvent(未知来源) 在 java.awt.LightweightDispatcher.processMouseEvent(未知来源) 在 java.awt.LightweightDispatcher.dispatchEvent(未知来源) 在 java.awt.Container.dispatchEventImpl(未知来源) 在 java.awt.Window.dispatchEventImpl(未知来源) 在 java.awt.Component.dispatchEvent(未知来源) 在 java.awt.EventQueue.dispatchEventImpl(未知来源) 在 java.awt.EventQueue.access$500(未知来源) 在 java.awt.EventQueue$3.run(未知来源) 在 java.awt.EventQueue$3.run(未知来源) 在 java.security.AccessController.doPrivileged(本机方法) 在 java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(未知来源) 在 java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(未知来源) 在 java.awt.EventQueue$4.run(未知来源) 在 java.awt.EventQueue$4.run(未知来源) 在 java.security.AccessController.doPrivileged(本机方法) 在 java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(未知来源) 在 java.awt.EventQueue.dispatchEvent(未知来源) 在 java.awt.EventDispatchThread.pumpOneEventForFilters(未知来源) 在 java.awt.EventDispatchThread.pumpEventsForFilter(未知来源) 在 java.awt.EventDispatchThread.pumpEventsForHierarchy(未知来源) 在 java.awt.EventDispatchThread.pumpEvents(未知来源) 在 java.awt.EventDispatchThread.pumpEvents(未知来源) 在 java.awt.EventDispatchThread.run(未知来源)

我该如何解决这个问题?

这是我的源代码:

IMP/src/com/imp/dao/DatabaseConnectionHelper.java

package com.imp.dao;

import java.sql.Connection;
import java.sql.DriverManager;

public class DatabaseConnectionHelper 
    public static void main(String[] args) throws Exception 
        getConnection();

    
    public static Connection getConnection() throws Exception 
        try 
            String driver = "com.mysql.jdbc.Driver";
            String url = "jdbc:mysql://localhost:3306/imp";
            String username = "root";
            String password = "password";
            Class.forName(driver);

            Connection conn = DriverManager.getConnection(url, username, password);
            System.out.println("Database Connected");
            return conn;
         
        catch (Exception e) 
            System.out.println(e);
        
        return null;
    

/IMP/src/com/imp/ProductController.java

package com.imp;

import java.awt.List;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;

import com.imp.dao.DatabaseConnectionHelper;
import com.mysql.jdbc.CallableStatement;

public class ProductController 
    public static boolean SavePname ( String pname ) throws SQLException 
        Connection myConn = null;
        CallableStatement myCsmt = null;
        boolean check = true;

        try 
            myConn = DatabaseConnectionHelper.getConnection();
            myCsmt = (CallableStatement) myConn.prepareCall(" CALL save_product(?) ");

            myCsmt.setString(1, pname);
            check = myCsmt.execute();
         
        catch (Exception exp) 
            exp.printStackTrace();
        
        finally
            Close (myConn, myCsmt);
        
        return check;
    

    public static boolean SavePurchase ( String pname, String price, String pdate, String qty ) throws SQLException 
        Connection myConn = null;
        CallableStatement myCsmt = null;
        boolean check = true;

        try 
            myConn = DatabaseConnectionHelper.getConnection();
            myCsmt = (CallableStatement) myConn.prepareCall(" CALL save_purchase(getProductid(?), ?, ?, ?) ");

            myCsmt.setString(1, pname);
            myCsmt.setString(2, price);
            myCsmt.setString(3, pdate);
            myCsmt.setString(4, qty);

            check = myCsmt.execute();
         
        catch (Exception exp) 
            exp.printStackTrace();
        
        finally
            Close (myConn, myCsmt);
        
        return check;
    

    public static boolean SaveSale ( String pname, String price, String Sdate, String qty ) throws SQLException 
        Connection myConn = null;
        CallableStatement myCsmt = null;
        boolean check = true;

        try 
            myConn = DatabaseConnectionHelper.getConnection();
            myCsmt = (CallableStatement) myConn.prepareCall(" CALL save_sale(getProductid(?), ?, ?, ?) ");

            myCsmt.setString(1, pname);
            myCsmt.setString(2, price);
            myCsmt.setString(3, Sdate);
            myCsmt.setString(4, qty);

            check = myCsmt.execute();
         
        catch (Exception exp) 
            exp.printStackTrace();
        
        finally
            Close (myConn, myCsmt);
        
        return check;
    

    public static void LoadComboBox ( JComboBox combo ) throws SQLException 
        Connection myConn = null;
        CallableStatement myCsmt = null;
        ResultSet myRs = null;

        try 
            myConn = DatabaseConnectionHelper.getConnection();
            myCsmt = (CallableStatement) myConn.prepareCall(" CALL listProduct() ");

            myCsmt.execute();
            myRs = myCsmt.getResultSet();

           ArrayList pList = new ArrayList();

           while ( myRs.next() ) 
               pList.add(myRs.getString(1));
           

           combo.setModel(new DefaultComboBoxModel(pList.toArray()));
           combo.insertItemAt("Select one", 0);
           combo.setSelectedIndex(0);
        
       catch (Exception exp) 
           exp.printStackTrace();
       
       finally
           Close (myConn, myCsmt, myRs);
       
   


   private static void Close(Connection myConn, CallableStatement myStmt)
        throws SQLException 

       if (myStmt != null) 
           myStmt.close();
       

       if (myConn != null) 
           myConn.close();
       
    

    private static void Close(Connection myConn, CallableStatement myStmt, ResultSet myRs)
        throws SQLException 

        if (myStmt != null) 
            myStmt.close();
        

        if (myConn != null) 
            myConn.close();
        

        if (myRs != null) 
            myRs.close();
        
    

/IMP/src/com/imp/Inventory.java(这是我的框架文件)

package com.imp;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.SQLType;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import com.mysql.jdbc.CallableStatement;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JComboBox;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener; 
import java.awt.event.ActionEvent;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import com.imp.dao.DatabaseConnectionHelper;
public class Inventory extends JFrame 

    private JPanel contentPane;
    private JTextField PriceTextField;
    private JTextField QtyTextField;
    private JTextField DateTextField;

/**
 * Launch the application.
 */
public static void main(String[] args) 
    EventQueue.invokeLater(new Runnable() 
        public void run() 
            try 
                Inventory frame = new Inventory();
                frame.setVisible(true);
             catch (Exception e) 
                e.printStackTrace();
            
        
    );


/**
 * Create the frame.
 * @throws SQLException 
 */
public Inventory() throws SQLException 
    setTitle("Inventory Management System");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 469, 356);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);

    JLabel lblProductName = new JLabel("Product Name:");

    JComboBox comboBox = new JComboBox();

    comboBox.setEditable(true);

    JLabel lblNewLabel = new JLabel("Available Quantity:");

    JLabel lblNewLabel_1 = new JLabel("AVG Purchase Price:");

    JLabel lblNewLabel_2 = new JLabel("Price:");

    JLabel lblNewLabel_3 = new JLabel("Quantity:");

    JLabel lblNewLabel_4 = new JLabel("Date:");

    JLabel lbQty = new JLabel("");

    JLabel lbPrice = new JLabel("");

    PriceTextField = new JTextField();
    PriceTextField.setColumns(10);

    QtyTextField = new JTextField();
    QtyTextField.setColumns(10);

    DateTextField = new JTextField();
    DateTextField.setColumns(10);

    JButton btnPurchase = new JButton("Purchase");
    btnPurchase.addActionListener(new ActionListener() 
        public void actionPerformed(ActionEvent arg0) 
            boolean check = false;

            if ( comboBox.getSelectedIndex() < 0 )
                try 
                    ProductController.SavePname(comboBox.getSelectedItem().toString());
                 
                catch (SQLException e)     
                    e.printStackTrace();
                
            

            try 
                check = ProductController.SavePurchase(comboBox.getSelectedItem().toString(), 
                        PriceTextField.getText(), DateTextField.getText(), QtyTextField.getText());
             
            catch (SQLException e) 
                e.printStackTrace();
            

            if (!check)
                JOptionPane.showMessageDialog(rootPane, "Purchase Save SuccessFully.....!!....");
                // By this method we can load all product from our database
                try 
                    ProductController.LoadComboBox(comboBox);
                    Clear();
                 
                catch (SQLException e) 
                    e.printStackTrace();
                
            
        

        private void Clear() 
            comboBox.setSelectedIndex(0);
            lbQty.setText("");
            lbPrice.setText("");
            PriceTextField.setText("");
            QtyTextField.setText("");
            DateTextField.setText("");
        
    );

    JButton btnSale = new JButton("Sale");
    btnSale.addActionListener(new ActionListener() 
        public void actionPerformed(ActionEvent arg0) 

            boolean check = false;

            if ( comboBox.getSelectedIndex() < 0 )
                try 
                    ProductController.SavePname(comboBox.getSelectedItem().toString());
                 
                catch (SQLException e)     
                    e.printStackTrace();
                
            

            try 
                check = ProductController.SaveSale(comboBox.getSelectedItem().toString(), 
                        PriceTextField.getText(), DateTextField.getText(), QtyTextField.getText());
             
            catch (SQLException e) 
                e.printStackTrace();
            

            if (!check)
                JOptionPane.showMessageDialog(rootPane, "Sale Save SuccessFully.....!!....");
                // By this method we can load all product from our database
                try 
                    ProductController.LoadComboBox(comboBox);
                    Clear();
                 
                catch (SQLException e) 
                    e.printStackTrace();
                
            
        

        private void Clear() 
            comboBox.setSelectedIndex(0);
            lbQty.setText("");
            lbPrice.setText("");
            PriceTextField.setText("");
            QtyTextField.setText("");
            DateTextField.setText("");
        
    );

    comboBox.addItemListener(new ItemListener() 
        @SuppressWarnings( "null", "resource" )
        public void itemStateChanged(ItemEvent arg0) 
            if ( comboBox.getSelectedIndex() > 0 ) 
                Connection myConn = null;
                CallableStatement myCsmt = null;
                ResultSet myRs = null;

                try 
                    myConn = DatabaseConnectionHelper.getConnection();
                    myCsmt = (CallableStatement) myConn.prepareCall("?= call getProductQty(?)");

                    myCsmt.registerOutParameter(1, java.sql.Types.INTEGER);
                    myCsmt.setString(2, comboBox.getSelectedItem().toString());

                    myCsmt.execute();

                    int output = myCsmt.getInt(1);
                    //JLabel lbQty = null;
                    //JLabel lbPrice = null;

                    lbQty.setText(String.valueOf(output));

                    //
                    myCsmt = (CallableStatement) myConn.prepareCall("CALL avg_price(getProductid(?))");
                    myCsmt.setString(1, comboBox.getSelectedItem().toString());
                    myCsmt.execute();

                    myRs = myCsmt.getResultSet();

                    while ( myRs.next() ) 
                        lbPrice.setText(myRs.getString(1));
                    
                 
                catch (Exception e) 
                    e.printStackTrace();
                
                finally
                    try 
                        myConn.close();
                        myCsmt.close();
                        myRs.close();
                     
                    catch (SQLException e) 
                        e.printStackTrace();
                    
                
            

        
    );


    JButton btnClear = new JButton("Clear");
    GroupLayout gl_contentPane = new GroupLayout(contentPane);
    gl_contentPane.setHorizontalGroup(
        gl_contentPane.createParallelGroup(Alignment.LEADING)
            .addGroup(gl_contentPane.createSequentialGroup()
                .addContainerGap()
                .addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
                    .addComponent(lblProductName)
                    .addComponent(lblNewLabel)
                    .addComponent(lblNewLabel_1)
                    .addComponent(lblNewLabel_2)
                    .addComponent(lblNewLabel_3)
                    .addComponent(lblNewLabel_4)
                    .addComponent(btnPurchase))
                .addGap(57)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
                    .addComponent(lbPrice, GroupLayout.DEFAULT_SIZE, 241, Short.MAX_VALUE)
                    .addComponent(lbQty, GroupLayout.DEFAULT_SIZE, 241, Short.MAX_VALUE)
                    .addComponent(DateTextField, 241, 241, 241)
                    .addComponent(QtyTextField, 241, 241, 241)
                    .addComponent(PriceTextField, 241, 241, 241)
                    .addComponent(comboBox, 0, 241, Short.MAX_VALUE)
                    .addGroup(gl_contentPane.createSequentialGroup()
                        .addGap(25)
                        .addComponent(btnSale)
                        .addPreferredGap(ComponentPlacement.RELATED, 106, Short.MAX_VALUE)
                        .addComponent(btnClear)))
                .addContainerGap(144, Short.MAX_VALUE))
    );
    gl_contentPane.setVerticalGroup(
        gl_contentPane.createParallelGroup(Alignment.LEADING)
            .addGroup(gl_contentPane.createSequentialGroup()
                .addContainerGap()
                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                    .addComponent(lblProductName)
                    .addComponent(comboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(ComponentPlacement.UNRELATED)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                    .addComponent(lblNewLabel)
                    .addComponent(lbQty, GroupLayout.PREFERRED_SIZE, 21, GroupLayout.PREFERRED_SIZE))
                .addGap(18)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                    .addComponent(lblNewLabel_1)
                    .addComponent(lbPrice, GroupLayout.PREFERRED_SIZE, 21, GroupLayout.PREFERRED_SIZE))
                .addGap(18)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                    .addComponent(lblNewLabel_2)
                    .addComponent(PriceTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
                .addGap(18)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                    .addComponent(lblNewLabel_3)
                    .addComponent(QtyTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
                .addGap(18)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
                    .addComponent(lblNewLabel_4)
                    .addComponent(DateTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(ComponentPlacement.RELATED, 50, Short.MAX_VALUE)
                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                    .addComponent(btnPurchase)
                    .addComponent(btnClear)
                    .addComponent(btnSale))
                .addGap(48))
    );
    contentPane.setLayout(gl_contentPane);

    // By this method we can load all product from our database
    ProductController.LoadComboBox(comboBox);

这是我的产品表结构:

这是我的销售表结构:

这是我的采购表结构:

这是我的 save_sale 存储过程结构

【问题讨论】:

你有一个类型正在使用 sdate 但你有 pdate @scaisEdge 表明sale 表有一个sdate 您需要减少代码量,并且只显示重现此错误所需的最低限度(包括存储过程 DDL)。据我所知,您的一个存储过程 (save_sale) 在没有具有该名称的列的表上引用了列 sdate 我已经发布了一个答案,希望有用 请将 DDL 发布为代码,而不是图像。顺便说一句,问题在于您的purchase 表没有sdate 列,因此您需要修复该存储过程以使用pdate 【参考方案1】:

在某处你有 Sdate 和 pdate .. 所以 .. sdate 和 Sdate 不一样,还要检查 pdate

    try 
        myConn = DatabaseConnectionHelper.getConnection();
        myCsmt = (CallableStatement) myConn.prepareCall(" CALL save_sale(getProductid(?), ?, ?, ?) ");

        myCsmt.setString(1, pname);
        myCsmt.setString(2, price);
        myCsmt.setString(3, Sdate); /// this one  
        myCsmt.setString(4, qty);

查看您的图像 .. 您尝试使用 sdate 插入购买 .. 但在购买中,该列名为 pdate ..

【讨论】:

我已经尝试更改我的代码,你们注意到 bt 我仍然获得相同的豁免......我上传了新图片,这是我的 save_sale 存储过程表...... .thnx提前你们所有人

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