“Netbeans”；“尚未实施”；当连接到MySQL时
这是我的学校项目，当我尝试插入时，我收到一个错误“尚未实施”。 我已经为此创建了MYSQL数据库和表。 由于限制，删除了一些 我在插入和更新区域有问题“Netbeans”；“尚未实施”；当连接到MySQL时,mysql,database,netbeans,Mysql,Database,Netbeans,这是我的学校项目，当我尝试插入时，我收到一个错误“尚未实施”。 我已经为此创建了MYSQL数据库和表。 由于限制，删除了一些 我在插入和更新区域有问题 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /* * Student_managment_system.java * * Created on 23-Nov-2015, 07:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* Student_managment_system.java
*
* Created on 23-Nov-2015, 07:57:12
*/
package holidayhomework1;
import com.mysql.jdbc.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import javax.swing.JOptionPane;
/**
*
* @author Student
*/
public class Student_managment_system extends javax.swing.JFrame {
/** Creates new form Student_managment_system */
public Student_managment_system() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jFrame1 = new javax.swing.JFrame();
jLabel10 = new javax.swing.JLabel();
jLabel11 = new javax.swing.JLabel();
jLabel12 = new javax.swing.JLabel();
jLabel13 = new javax.swing.JLabel();
jLabel14 = new javax.swing.JLabel();
jLabel15 = new javax.swing.JLabel();
jtf1 = new javax.swing.JTextField();
jtf2 = new javax.swing.JTextField();
jtf3 = new javax.swing.JTextField();
jtf4 = new javax.swing.JTextField();
jtf5 = new javax.swing.JTextField();
jButton6 = new javax.swing.JButton();
jButton7 = new javax.swing.JButton();
jButton8 = new javax.swing.JButton();
jButton9 = new javax.swing.JButton();
jFrame2 = new javax.swing.JFrame();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
jLabel6 = new javax.swing.JLabel();
jLabel7 = new javax.swing.JLabel();
jLabel8 = new javax.swing.JLabel();
tf1 = new javax.swing.JTextField();
tf2 = new javax.swing.JTextField();
tf3 = new javax.swing.JTextField();
tf4 = new javax.swing.JTextField();
tf5 = new javax.swing.JTextField();
tf6 = new javax.swing.JTextField();
tf7 = new javax.swing.JTextField();
tf8 = new javax.swing.JTextField();
jLabel9 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jButton4 = new javax.swing.JButton();
jButton5 = new javax.swing.JButton();
jLabel10.setFont(new java.awt.Font("Tahoma", 0, 24)); // NOI18N
jLabel10.setText("Fees Management System");
jLabel11.setText("Student ID");
jLabel12.setText("Student Name");
jLabel13.setText("Fees Amount");
jLabel14.setText("Balance");
jLabel15.setText("Last Paid");
jButton6.setText("Search");
jButton6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton6ActionPerformed(evt);
}
});
jButton7.setText("Update");
jButton7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton7ActionPerformed(evt);
}
});
jButton8.setText("Delete");
jButton8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton8ActionPerformed(evt);
}
});
jButton9.setText("Insert");
jButton9.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton9ActionPerformed(evt);
}
});
javax.swing.GroupLayout jFrame1Layout = new javax.swing.GroupLayout(jFrame1.getContentPane());
jFrame1.getContentPane().setLayout(jFrame1Layout);
jFrame1Layout.setHorizontalGroup(
jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jFrame1Layout.createSequentialGroup()
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jFrame1Layout.createSequentialGroup()
.addGap(61, 61, 61)
.addComponent(jButton6)
.addGap(18, 18, 18)
.addComponent(jButton7)
.addGap(28, 28, 28)
.addComponent(jButton8)
.addGap(18, 18, 18)
.addComponent(jButton9))
.addGroup(jFrame1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jFrame1Layout.createSequentialGroup()
.addComponent(jLabel11)
.addGap(246, 246, 246)
.addComponent(jtf1, javax.swing.GroupLayout.DEFAULT_SIZE, 73, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jFrame1Layout.createSequentialGroup()
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel12)
.addComponent(jLabel13)
.addComponent(jLabel14)
.addComponent(jLabel15))
.addGap(230, 230, 230)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jtf4)
.addComponent(jtf3)
.addComponent(jtf2)
.addComponent(jtf5, javax.swing.GroupLayout.DEFAULT_SIZE, 73, Short.MAX_VALUE)))))
.addGroup(jFrame1Layout.createSequentialGroup()
.addGap(62, 62, 62)
.addComponent(jLabel10)))
.addContainerGap(28, Short.MAX_VALUE))
);
jFrame1Layout.setVerticalGroup(
jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jFrame1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel10)
.addGap(18, 18, 18)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel11)
.addComponent(jtf1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel12)
.addComponent(jtf2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel13)
.addComponent(jtf3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel14)
.addComponent(jtf4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel15)
.addComponent(jtf5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton6)
.addComponent(jButton7)
.addComponent(jButton8)
.addComponent(jButton9))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
javax.swing.GroupLayout jFrame2Layout = new javax.swing.GroupLayout(jFrame2.getContentPane());
jFrame2.getContentPane().setLayout(jFrame2Layout);
jFrame2Layout.setHorizontalGroup(
jFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
jFrame2Layout.setVerticalGroup(
jFrame2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("Student ID");
jLabel2.setText("Student Name");
jLabel3.setText("Father Name");
jLabel4.setText("Mobile Number");
jLabel5.setText("Age");
jLabel6.setText("Nationality");
jLabel7.setText("Cast");
jLabel8.setText("Gender");
jLabel9.setFont(new java.awt.Font("Ubuntu", 1, 24)); // NOI18N
jLabel9.setText("School Management System");
jButton1.setText("Insert");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Update");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jButton3.setText("Delete");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
jButton4.setText("Search");
jButton4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton4ActionPerformed(evt);
}
});
jButton5.setText("Fees Information");
jButton5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton5ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(95, Short.MAX_VALUE)
.addComponent(jLabel9, javax.swing.GroupLayout.PREFERRED_SIZE, 359, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(62, 62, 62))
.addGroup(layout.createSequentialGroup()
.addGap(54, 54, 54)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1)
.addGap(31, 31, 31)
.addComponent(jButton2)
.addGap(30, 30, 30)
.addComponent(jButton3)
.addGap(33, 33, 33)
.addComponent(jButton4)
.addGap(74, 74, 74))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel2)
.addComponent(jLabel3)
.addComponent(jLabel4)
.addComponent(jLabel5)
.addComponent(jLabel6)
.addComponent(jLabel7)
.addComponent(jLabel8)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 58, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(128, 128, 128)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(tf5, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf1, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf2, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf3, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf4, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf6, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf7, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE)
.addComponent(tf8, javax.swing.GroupLayout.DEFAULT_SIZE, 117, Short.MAX_VALUE))
.addGap(147, 147, 147))))
.addGroup(layout.createSequentialGroup()
.addGap(170, 170, 170)
.addComponent(jButton5)
.addContainerGap(231, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(27, 27, 27)
.addComponent(jLabel9, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(tf1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addGap(26, 26, 26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(tf2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(26, 26, 26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(tf3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(27, 27, 27)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel4)
.addComponent(tf4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(28, 28, 28)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(tf5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(27, 27, 27)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel6)
.addComponent(tf6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(27, 27, 27)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel7)
.addComponent(tf7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(26, 26, 26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel8)
.addComponent(tf8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(31, 31, 31)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jButton3)
.addComponent(jButton4)
.addComponent(jButton2))
.addGap(18, 18, 18)
.addComponent(jButton5)
.addContainerGap(33, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = tf1.getText();
String Name = tf2.getText();
String Fname = tf3.getText();
String Numb = tf4.getText();
String Age = tf5.getText();
String Nation = tf6.getText();
String Cast =tf7.getText();
String Gender = tf8.getText();
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/studentmanagement","root","root");
Statement stmt = (Statement) con.createStatement();
String query="Insert into Studentdetails values('"+SID+"','"+Name+"','"+Fname+"','"+Numb+"','"+Age+"','"+Nation+"','"+Cast+"','"+Gender+"');";
Stmt.executeUpdate(query);
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}
// TODO add your handling code here:
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = tf1.getText();
String Name = tf2.getText();
String Fname = tf3.getText();
String Numb = tf4.getText();
String Age = tf5.getText();
String Nation = tf6.getText();
String Cast =tf7.getText();
String Gender = tf8.getText();
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/harman","root","gaes");
Statement stmt=(Statement)con.createStatement();
String query="Update StudentDetails Set SName='"+Name+"',FName='"+Fname+"',Number='"+Numb+"',Age='"+Age+"',Nationality='"+Nation+"',Cast='"+Cast+"',Gender='"+Gender+"' where SID='"+SID+"';";
stmt.executeUpdate(query);
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}
// TODO add your handling code here:
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = tf1.getText();
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/harman","root","gaes");
Statement stmt = (Statement) con.createStatement();
String query="Delete from StudentDetails where SID = '"+SID+"';";
Stmt.executeUpdate(query);
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}
// TODO add your handling code here:
}
private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {
jFrame1.setVisible(true); // TODO add your handling code here:
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = tf1.getText();
if (SID.isEmpty())
{
JOptionPane.showMessageDialog(this,"No StudentID Detected !!!!");
}
else
{
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/studentdetails","root","root");
Statement stmt = (Statement)
con.createStatement();
String query = "Select * from StudentDetails where SID = '"+SID+"';";
ResultSet rs = stmt.executeQuery(query);
if (rs.next())
{
String Name = rs.getString("SName");
String Fname = rs.getString("FName");
String Num = rs.getString("Number");
String Age = rs.getString("Age");
String Nat = rs.getString("Nationality");
String cast = rs.getString("Cast");
String Gender = rs.getString("Gender");
//Critical Zone
tf2.setText(Name);
tf3.setText(Fname);
tf4.setText(Num);
tf5.setText(Age);
tf6.setText(Nat);
tf7.setText(cast);
tf8.setText(Gender);
}
else
JOptionPane.showMessageDialog(this ,"NO SUCH STUDENT EXIST!!!!");
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}
}// TODO add your handling code here:
}
private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = jtf1.getText();
if (SID.isEmpty())
{
JOptionPane.showMessageDialog(this,"No StudentID Detected !!!!");
}
else
{
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/harman","root","gaes");
Statement stmt = (Statement)
con.createStatement();
String query = "Select * from feesinfo where SID = '"+SID+"';";
ResultSet rs = stmt.executeQuery(query);
if (rs.next())
{
String SName = rs.getString("SName");
String Famount = rs.getString("Famount");
String balance = rs.getString("Balance");
String lastpaid = rs.getString("lastpaid");
//Critical Zone
jtf2.setText(SName);
jtf3.setText(Famount);
jtf4.setText(balance);
jtf5.setText(lastpaid);
}
else
JOptionPane.showMessageDialog(this ,"NO SUCH STUDENT EXIST!!!!");
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}
}
}
private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = jtf1.getText();
String SName = jtf2.getText();
String Famount = jtf3.getText();
String Bal = jtf4.getText();
String lastpaid = jtf5.getText();
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/harman","root","gaes");
Statement stmt = (Statement) con.createStatement();
String query="Insert into feesinfo values ('"+SID+"','"+SName+"','"+Famount+"','"+Bal+"','"+lastpaid+"');";
Stmt.executeUpdate(query);
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}// TODO add your handling code here: // TODO add your handling code here:
}
private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = jtf1.getText();
String SName = jtf2.getText();
String Famount = jtf3.getText();
String Bal = jtf4.getText();
String lastpaid = jtf5.getText();
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/harman","root","gaes");
Statement stmt = (Statement) con.createStatement();
String query="Update StudentDetails Set SName='"+SName+"',Famount='"+Famount+"',balance='"+Bal+"',lastpaid='"+lastpaid+"' where SID='"+SID+"';";
stmt.executeUpdate(query);
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
}// TODO add your handling code here:
}
private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) {
String SID = jtf1.getText();
try
{
Class.forName("java.sql.DriverManager");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/harman","root","gaes");
Statement stmt = (Statement) con.createStatement();
String query="Delete from feesinfo where SID = '"+SID+"';";
Stmt.executeUpdate(query);
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this, e.getMessage());
} // TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Student_managment_system().setVisible(true);
}
});
}
}
/*
*要更改此模板，请选择工具|模板
*然后在编辑器中打开模板。
*/
/*
*学生管理系统.java
*
*创建于2015年11月23日07:57:12
*/
一揽子度假家庭作业1；
导入com.mysql.jdbc.Statement；
导入java.sql.Connection；
导入java.sql.DriverManager；
导入java.sql.ResultSet；
导入javax.swing.JOptionPane；
/**
*
*@作者学生
*/
公共班级学生管理系统扩展javax.swing.JFrame{
/**创建新表单学生管理系统*/
公立学生管理系统（）{
初始化组件（）；
}
/**此方法从构造函数中调用，以
*初始化表单。
*警告：请勿修改此代码。此方法的内容为
*始终由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
//
私有组件（）{
jFrame1=newjavax.swing.JFrame（）；
jLabel10=newjavax.swing.JLabel（）；
jLabel11=newjavax.swing.JLabel（）；
jLabel12=newjavax.swing.JLabel（）；
jLabel13=newjavax.swing.JLabel（）；
jLabel14=newjavax.swing.JLabel（）；
jLabel15=newjavax.swing.JLabel（）；
jtf1=newjavax.swing.JTextField（）；
jtf2=newjavax.swing.JTextField（）；
jtf3=newjavax.swing.JTextField（）；
jtf4=newjavax.swing.JTextField（）；
jtf5=newjavax.swing.JTextField（）；
jButton6=newjavax.swing.JButton（）；
jButton7=newjavax.swing.JButton（）；
jButton8=newjavax.swing.JButton（）；
jButton9=newjavax.swing.JButton（）；
jFrame2=newjavax.swing.JFrame（）；
jLabel1=newjavax.swing.JLabel（）；
jLabel2=newjavax.swing.JLabel（）；
jLabel3=newjavax.swing.JLabel（）；
jLabel4=newjavax.swing.JLabel（）；
jLabel5=newjavax.swing.JLabel（）；
jLabel6=newjavax.swing.JLabel（）；
jLabel7=newjavax.swing.JLabel（）；
jLabel8=newjavax.swing.JLabel（）；
tf1=newjavax.swing.JTextField（）；
tf2=new javax.swing.JTextField（）；
tf3=newjavax.swing.JTextField（）；
tf4=newjavax.swing.JTextField（）；
tf5=newjavax.swing.JTextField（）；
tf6=newjavax.swing.JTextField（）；
tf7=newjavax.swing.JTextField（）；
tf8=newjavax.swing.JTextField（）；
jLabel9=newjavax.swing.JLabel（）；
jButton1=newjavax.swing.JButton（）；
jButton2=newjavax.swing.JButton（）；
jButton3=newjavax.swing.JButton（）；
jButton4=newjavax.swing.JButton（）；
jButton5=newjavax.swing.JButton（）；
jLabel10.setFont（新的java.awt.Font（“Tahoma”，0，24））；//NOI18N
jLabel10.setText（“费用管理系统”）；
jLabel11.setText（“学生ID”）；
jLabel12.setText（“学生姓名”）；
jLabel13.setText（“费用金额”）；
jLabel14.setText（“余额”）；
jLabel15.setText（“上次支付”）；
jButton6.setText（“搜索”）；
jButton6.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
JButton6执行的操作（evt）；
}
});
jButton7.setText（“更新”）；
jButton7.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton7ActionPerformed（evt）；
}
});
jButton8.setText（“删除”）；
jButton8.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton8ActionPerformed（evt）；
}
});
jButton9.setText（“插入”）；
jButton9.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton9ActionPerformed（evt）；
}
});
javax.swing.GroupLayout jFrame1Layout=newjavax.swing.GroupLayout（jFrame1.getContentPane（））；
jFrame1.getContentPane（）.setLayout（jFrame1Layout）；
jFrame1Layout.setHorizontalGroup(
jFrame1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jFrame1Layout.createSequentialGroup（）
.addGroup（jFrame1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jFrame1Layout.createSequentialGroup（）
.addGap（61,61,61）
.addComponent（jButton6）
.addGap（18,18,18）
.addComponent（jButton7）
.addGap（28,28,28）
.addComponent（jButton8）
.addGap（18,18,18）
.addComponent（jButton9））
.addGroup（jFrame1Layout.createSequentialGroup（）
.addContainerGap（）
.addGroup（jFrame1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.Training，false）
.addGroup（javax.swing.GroupLayout.Alignment.LEADING，jFrame1Layout.createSequentialGroup（）
.addComponent（jLabel11）
.addGap（246246246）
.addComponent（jtf1，javax.swing.GroupLayout.DEFAULT_SIZE，73，Short.MAX_VALUE））
.addGroup（javax.swing.GroupLayout.Alignment.LEADING，jFrame1Layout.createSequentialGroup（）
.addGroup（jFrame1Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）