logframe.java

JAVA图书管理系统有很多代码这只是很小的一部分

/*
 * LogFrame.java
 *
 * Created on 2004年1月4日, 下午5:58
 */

package library;
import java.sql.*;
import javax.swing.JOptionPane;
/**
 *
 * @author  Administrator
 */
public class LogFrame extends javax.swing.JFrame {
    
    /** Creates new form LogFrame */
    public LogFrame() {
        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.
     */
    // <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();
        nameTextField = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        passwordField = new javax.swing.JPasswordField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("\u767b\u5165\u7cfb\u7edf");
        jLabel1.setFont(new java.awt.Font("宋体", 1, 14));
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("\u6b22\u8fce\u4f7f\u7528\u56fe\u4e66\u7ba1\u7406\u7cfb\u7edf");

        jLabel2.setFont(new java.awt.Font("宋体", 1, 12));
        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel2.setText("\u7528\u6237\u540d\uff1a");

        jLabel3.setFont(new java.awt.Font("宋体", 1, 12));
        jLabel3.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel3.setText("\u5bc6\u7801\uff1a");

        jButton1.setFont(new java.awt.Font("宋体", 1, 12));
        jButton1.setText("\u767b\u5f55");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jButton2.setFont(new java.awt.Font("宋体", 1, 12));
        jButton2.setText("\u53d6\u6d88");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
                        .add(74, 74, 74)
                        .add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 230, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                    .add(layout.createSequentialGroup()
                        .add(52, 52, 52)
                        .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(layout.createSequentialGroup()
                                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                                    .add(jLabel2)
                                    .add(jLabel3, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 39, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                                .add(15, 15, 15)
                                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
                                    .add(passwordField, 0, 0, Short.MAX_VALUE)
                                    .add(nameTextField, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 146, Short.MAX_VALUE))
                                .add(40, 40, 40))
                            .add(layout.createSequentialGroup()
                                .add(jButton1)
                                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 136, Short.MAX_VALUE)
                                .add(jButton2)
                                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)))))
                .addContainerGap(94, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(39, 39, 39)
                .add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 23, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .add(32, 32, 32)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.TRAILING)
                    .add(jLabel2)
                    .add(nameTextField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(layout.createSequentialGroup()
                        .add(54, 54, 54)
                        .add(jLabel3))
                    .add(layout.createSequentialGroup()
                        .add(39, 39, 39)
                        .add(passwordField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 56, Short.MAX_VALUE)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jButton1)
                    .add(jButton2))
                .add(37, 37, 37))
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
// TODO 将在此处添加您的处理代码：
      nameTextField.setText("");
        passwordField.setText("");
         this.hide();
              MainFrame mf=new MainFrame();
              mf.show();
    }//GEN-LAST:event_jButton2ActionPerformed

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
// TODO 将在此处添加您的处理代码：
        name=nameTextField.getText().trim();
        pass=String.valueOf(passwordField.getPassword());
        if((!"".equals(name))&&(!"".equals(pass))){
            try{
             Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
             Connection con =DriverManager.getConnection("jdbc:odbc:library","","");
             Statement st= con.createStatement();
             String s1="select * from user where name='"+name+"'and pass='"+pass+"'";
             ResultSet rs=st.executeQuery(s1);
             rs.next();
             if(rs.getRow()>0){
              this.hide();
              MainFrame mf=new MainFrame();
              mf.show();
             }else{
                JOptionPane.showMessageDialog(this,"重新登入");
             }
             st.close();
             con.close();
            }catch(Exception e){
               System.out.println("错误连接"); 
            }
        }else{
            JOptionPane.showMessageDialog(this,"请重新输入");
        }
    }//GEN-LAST:event_jButton1ActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new LogFrame().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.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JTextField nameTextField;
    private javax.swing.JPasswordField passwordField;
    // 变量声明结束//GEN-END:variables
  String name;
  String pass;
}