Java JDBC Sql错误索引超出范围 [英] Java JDBC Sql error index out of range
本文介绍了Java JDBC Sql错误索引超出范围的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在你问为什么有一个对象使用setter和getter在数据库中添加和检索数据之前,我们的教师告诉我们,我们应该从它的根学习JDBC,现在我想知道我的查询如何获得 t工作?它给我一个超出范围的索引,具体在第63行和第62行。
import java.awt。
import java.sql。*;
import javax.swing。*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Login extends JFrame {
private JLabel label1,label2;
私人JButton提交;
private JTextField textfield1;
private JPasswordField passfield;
private JPanel panel;
public Login(){
super(Log in);
setSize(300,100);
setLocationRelativeTo(null);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
label1 = new JLabel(User ID:);
textfield1 = new JTextField(15);
label2 = new JLabel(Password:);
passfield = new JPasswordField(15);
submit = new JButton(Submit);
panel = new JPanel(new GridLayout(3,1));
panel.add(label1);
panel.add(textfield1);
panel.add(label2);
panel.add(passfield);
panel.add(submit);
add(panel,BorderLayout.CENTER);
ButtonHandler handler = new ButtonHandler();
submit.addActionListener(handler);
} //结束登录构造函数
私有类ButtonHandler实现ActionListener {
public void actionPerformed(ActionEvent event){
String user = textfield1.getText();
char [] passChars = passfield.getPassword();
Connection conn = Jdbc.dbConn();
PreparedStatement ps = null;
ResultSet rs = null;
String pass = new String(passChars);
用户finance = new Finance();
finance.setEmpID(user);
finance.setPassword(pass);
if(passChars!= null){
String sql =SELECT finance_ID,finance_pass FROM finance_accounts WHERE finance_ID ='+ finance.getEmpID()+'+
AND finance_pass ='+ finance.getPassword()+';
try {
ps = conn.prepareStatement(sql);
ps.setString(1,user);
ps.setString(2,pass);
rs = ps.executeQuery();
if(rs.next()){
JOptionPane.showMessageDialog(null,Welcome!+ user);
dispose();
} else {
JOptionPane.showMessageDialog(null,用户ID或密码不正确);
}
} catch(Exception e){
e.printStackTrace();
} finally {
try {
rs.close();
ps.close();
conn.close();
} catch(Exception ee){
ee.printStackTrace();
}
}
} // end actionPerformed
} //结束ButtonHandler
} //结束类
}
遇到我的错误
java .sql.SQLException:参数索引超出范围(1>参数数,其为0)。
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
at com.mysql .jdbc.SQLError.createSQLException(SQLError.java:982)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.PreparedStatement.checkBounds(PreparedStatement .java:3729)
at com.mysql.jdbc.PreparedStatement.setInternal(PreparedStatement.java:3713)
at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:4553)
在Login $ ButtonHandler.actionPerformed(Login.java:63)
在javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
在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)
在java.awt.Component.processMouseEvent(Component.java:6288)
在javax.swing.JComponent.processMouseEvent(JComponent.java :3267)
at java.awt.Component.processEvent(Component.java:6053)
在java.awt.Container.processEvent(Container.java:2041)
在java.awt。 Component.dispatchEventImpl(Component.java:4651)
在java.awt.Container.dispatchEventImpl(Container.java:2099)
在java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
在java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
在java.awt.LightweightDispatcher.dispatchEvent(Container .java:4168)
在java.awt.Container.dispatchEventImpl(Container.java:2085)
在java.awt.Window.dispatchEventImpl(Window.java:2478)
在java。 awt.Component.dispatchEvent(Component.java:4481)
在java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
在java.awt.EventQueue.access $ 000(EventQueue.java:84 )
at java.awt.EventQueue $ 1.run(EventQueue.java:602)
at java.awt.EventQueue $ 1.run(EventQueue.java:600)
at java.security。 AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext $ 1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext $ 1.doIntersectionPrivilege(AccessControlContext.java:98)
在java.awt.EventQueue $ 2.run(EventQueue.java:616)
在java.awt.EventQueue $ 2.run(EventQueue.java:614)
在java.security.AccessController.doPrivileged Native方法)
在java.security.AccessControlContext $ 1.doIntersectionPrivilege(AccessControlContext.java:87)
在java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
在java.awt .EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:179)
在java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
在java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
在java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
在java.awt.EventDispatchThread.run EventDispatchThread.java:122)
java.lang.NullPointerException
at Login $ ButtonHandler.actionPerformed(Login.java:76)
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)
在javax.swing。 DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
在javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
在java.awt.Component.processMouseEvent(Component.java: 6288)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6053)
at java.awt.Container .processEvent(Container.java:2041)
在java.awt.Component.dispatchEventImpl(Component.java:4651)
在java.awt.Container.dispatchEventImpl(Container.java:2099)
在java.awt.Component.dispatchEvent(Component.java:4481)
在java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
在java.awt.LightweightDispatcher.processMouseEvent(Container。 java:4238)
在java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
在java.awt.Container.dispatchEventImpl(Container.java:2085)
在java.awt .Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
at java.awt.EventQueue.access $ 000(EventQueue.java:84)
at java.awt.EventQueue $ 1.run(EventQueue.java:602)
at java.awt.EventQueue $ 1 .run(EventQueue.java:600)
在java.security.AccessController.doPrivileged(本地方法)
在java.security.AccessControlContext $ 1.doIntersectionPrivilege(AccessControlContext.java:87)
java.security.AccessControlContext $ 1.doIntersectionPrivilege(AccessControlContext.java:98)
在java.awt.EventQueue $ 2.run(EventQueue.java:616)
在java.awt.EventQueue $ 2.run(EventQueue .java:614)
在java.security.AccessController.doPrivileged(本地方法)
在java.security.AccessControlContext $ 1.doIntersectionPrivilege(AccessControlContext.java:87)
在java.awt。 EventQueue.dispatchEvent(EventQueue.java:613)
在java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
在java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
在java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
在java.awt.EventDispatchThread.pumpEvents(EventDispatchThread .java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
选择SQL字符串应该是这样:
String sql =SELECT finance_ID,finance_pass FROM finance_accounts WHERE finance_ID =? AND finance_pass =?;
当设置预备语句时,应使用 ps.setInt(1,user);
以设置您的使用ID。
Before you ask why there is an object using a setter and getter to add and retrieve data in the database , our instructor told us to this, we should learn JDBC by its root, now I am wondering how come my query won't work? it gives me an index out of range specifically on line 63 and 62
import java.awt.*;
import java.sql.*;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Login extends JFrame {
private JLabel label1, label2;
private JButton submit;
private JTextField textfield1;
private JPasswordField passfield;
private JPanel panel;
public Login() {
super("Log in");
setSize(300, 100);
setLocationRelativeTo(null);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
label1 = new JLabel("User ID:");
textfield1 = new JTextField(15);
label2 = new JLabel("Password:");
passfield = new JPasswordField(15);
submit = new JButton("Submit");
panel = new JPanel(new GridLayout(3, 1));
panel.add(label1);
panel.add(textfield1);
panel.add(label2);
panel.add(passfield);
panel.add(submit);
add(panel, BorderLayout.CENTER);
ButtonHandler handler = new ButtonHandler();
submit.addActionListener(handler);
}// end login constructor
private class ButtonHandler implements ActionListener {
public void actionPerformed(ActionEvent event) {
String user = textfield1.getText();
char[] passChars = passfield.getPassword();
Connection conn = Jdbc.dbConn();
PreparedStatement ps = null;
ResultSet rs = null;
String pass = new String(passChars);
User finance = new Finance();
finance.setEmpID(user);
finance.setPassword(pass);
if (passChars != null) {
String sql = "SELECT finance_ID, finance_pass FROM finance_accounts WHERE finance_ID ='"+finance.getEmpID()+"' " +
"AND finance_pass = '"+finance.getPassword()+"'";
try {
ps = conn.prepareStatement(sql);
ps.setString(1,user);
ps.setString(2, pass);
rs = ps.executeQuery();
if (rs.next()) {
JOptionPane.showMessageDialog(null,"Welcome! "+user);
dispose();
} else {
JOptionPane.showMessageDialog(null, "User ID or password is incorrect");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
rs.close();
ps.close();
conn.close();
} catch (Exception ee) {
ee.printStackTrace();
}
}
}// end actionPerformed
}// End ButtonHandler
}// End of class
}
heres my errors
java.sql.SQLException: Parameter index out of range (1 > number of parameters, which is 0).
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.PreparedStatement.checkBounds(PreparedStatement.java:3729)
at com.mysql.jdbc.PreparedStatement.setInternal(PreparedStatement.java:3713)
at com.mysql.jdbc.PreparedStatement.setString(PreparedStatement.java:4553)
at Login$ButtonHandler.actionPerformed(Login.java:63)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$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:6288)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6053)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4651)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:602)
at java.awt.EventQueue$1.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:616)
at java.awt.EventQueue$2.run(EventQueue.java:614)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
java.lang.NullPointerException
at Login$ButtonHandler.actionPerformed(Login.java:76)
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:6288)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6053)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4651)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
at java.awt.EventQueue.access$000(EventQueue.java:84)
at java.awt.EventQueue$1.run(EventQueue.java:602)
at java.awt.EventQueue$1.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:616)
at java.awt.EventQueue$2.run(EventQueue.java:614)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
解决方案
The way you use preparedStatement is wrong
The select SQL string should be like this:
String sql = "SELECT finance_ID, finance_pass FROM finance_accounts WHERE finance_ID = ? AND finance_pass = ?";
When set the prepared statement, you should use ps.setInt(1, user);
to set your use id.
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