modifypassword.java

一个球员管理系统

/*
 * modifypassword.java
 */

package playermanager;
import java.sql.*;
import javax.swing.JOptionPane;

public class modifypassword extends javax.swing.JFrame {
    
    /** Creates new form modifypassword */
    MainJFrame MF=new MainJFrame();
    public modifypassword() {
        initComponents();
    }
    
    public void validID() {
    
      String str1, str2,str3,str4;
      str1 = jTextField1.getText();
      str2 = jPasswordField1.getText();
      str3 = jPasswordField2.getText();
      
      if(str1.length()==0||str2.length()==0||str3.length()==0)
        JOptionPane.showMessageDialog(this,"请添加完整信息！");
      else{
     
          try{
     
      String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
      Driver driver = (Driver) Class.forName(driverName).newInstance();
      //连接的数据库是名为“data“的数据库
      //登录名是”sa“密码是“123”
      Connection con = DriverManager.getConnection(
          "jdbc:sqlserver://127.0.0.1:1433;", "sa", "123");
      con.setCatalog("data"); //数据库名称
      //执行动态的sql语句
      PreparedStatement pstmt = con.prepareStatement("select name ,password from usernp where name=?");
      //将用户的名字添加到具体的sql语句中
       pstmt.setString(1, str1);
      //使用ResultSet中的方法executeQuery()来完成sql语句的执行
      ResultSet res = pstmt.executeQuery();
    
     
    if (!res.next())  {
        JOptionPane.showMessageDialog(this, "用户名错误，请重新输入！", "错误提示",
                                      JOptionPane.ERROR_MESSAGE);
      }else {
                 if(str2.equals(str3)){
                String str = "update usernp set password='"+str2+"' where name='" + str1 + "'";
                PreparedStatement ps = con.prepareStatement(str);
                ps.executeUpdate();
                ps.close();
               JOptionPane.showMessageDialog(this,"修改成功!");
                 clearForm();
                
               
                 } else{
                     JOptionPane.showMessageDialog(this, "新密码错误，请重新输入！", "错误提示",
                                      JOptionPane.ERROR_MESSAGE);    
                      }
             }
      
       pstmt.close();
      
       con.close();
    }catch (InstantiationException e) {
      System.out.println(e.getMessage());
    }catch (IllegalAccessException e) {
      System.out.println(e.getMessage());
    }catch (ClassNotFoundException e) {
      System.out.println(e.getMessage());
    }catch (SQLException edd) {
      edd.printStackTrace() ;
      System.out.println(edd.getMessage());
        }
  }
}
     private void clearForm(){
    jTextField1.setText("");
    jPasswordField1.setText("");
    jPasswordField2.setText("");
    
    jTextField1.requestFocus();
      }
    
    /** 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.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jPasswordField1 = new javax.swing.JPasswordField();
        jPasswordField2 = new javax.swing.JPasswordField();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("\u4fee\u6539\u7ba1\u7406\u5458\u5bc6\u7801 ");
        setResizable(false);
        jLabel1.setText("\u8bf7\u8f93\u5165\u7528\u6237\u540d\uff1a");

        jLabel2.setText("\u8bf7\u8f93\u5165\u65b0\u5bc6\u7801\uff1a");

        jLabel3.setText("\u786e\u8ba4  \u65b0\u5bc6\u7801\uff1a");

        jButton1.setText("\u786e\u8ba4\u4fee\u6539");
        jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton1MouseClicked(evt);
            }
        });

        jButton2.setText("\u53d6\u6d88");
        jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton2MouseClicked(evt);
            }
        });

        jButton3.setText("\u6e05\u7a7a");
        jButton3.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton3MouseClicked(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(31, 31, 31)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(jLabel3))
                        .addGap(52, 52, 52))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jButton1)
                        .addGap(42, 42, 42)))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 86, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(44, 44, 44)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 83, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                            .addComponent(jTextField1, javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jPasswordField1, javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jPasswordField2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 157, Short.MAX_VALUE))))
                .addContainerGap(48, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(39, 39, 39)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(39, 39, 39)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(47, 47, 47)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(jPasswordField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 40, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton3)
                    .addComponent(jButton1)
                    .addComponent(jButton2))
                .addGap(39, 39, 39))
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton3MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton3MouseClicked
// TODO 将在此处添加您的处理代码：
        clearForm();
    }//GEN-LAST:event_jButton3MouseClicked

    private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton1MouseClicked
// TODO 将在此处添加您的处理代码：
        validID();
    }//GEN-LAST:event_jButton1MouseClicked

    private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton2MouseClicked
// TODO 将在此处添加您的处理代码：
               MF.setVisible(true);
               this.setVisible(false);
    }//GEN-LAST:event_jButton2MouseClicked
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new modifypassword().setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPasswordField jPasswordField1;
    private javax.swing.JPasswordField jPasswordField2;
    private javax.swing.JTextField jTextField1;
    // 变量声明结束//GEN-END:variables
    
}