我是Android编程的新手;我做了几个关于简单表的程序，它只适用于“从数据库中获取数据并在表中显示”或“将jtextfields中的文本保存到数据库”。所以我需要在Android上执行此操作，但我认为我的知识在Android上根本不起作用。我该如何在Android上执行此操作？
import java.sql.*;
import javax.swing.*;
import net.proteanit.sql.DbUtils;
import java.util.Calendar;
import java.util.GregorianCalendar;
public class YeniUye extends javax.swing.JFrame {
Connection conn=null;
ResultSet rs=null;
PreparedStatement pst=null;
/**
* Creates new form YeniUye
*/
public YeniUye() {
initComponents();
conn=javaconnect.ConnecrDb();
Update_table();
}
private void Update_table(){
try{
String sql ="select * from YeniUyeFrame ";
pst=conn.prepareStatement(sql);
rs=pst.executeQuery();
yeniuyetable.setModel(DbUtils.resultSetToTableModel(rs));
}
catch(Exception e){
JOptionPane.showMessageDialog(null, e);
}finally{
try{
pst.close();
rs.close();
}catch(Exception e){
}
}
}
/**
* 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() {
jPanel1 = new javax.swing.JPanel();
jLabel2 = new javax.swing.JLabel();
jLabel1 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jLabel5 = new javax.swing.JLabel();
yeniuyeepostatxt = new javax.swing.JTextField();
yeniuyeyastxt = new javax.swing.JTextField();
yeniuyeisimtxt = new javax.swing.JTextField();
yeniuyekatilimtarihitxt = new javax.swing.JTextField();
jScrollPane1 = new javax.swing.JScrollPane();
yeniuyetable = new javax.swing.JTable();
cmd_save = new javax.swing.JButton();
cmd_save1 = new javax.swing.JButton();
cmd_save2 = new javax.swing.JButton();
cmd_save3 = new javax.swing.JButton();
cmd_save4 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(new javax.swing.border.SoftBevelBorder(javax.swing.border.BevelBorder.RAISED));
jLabel2.setText("Yaş");
jLabel1.setText("İsim");
jLabel4.setText("E-Posta");
jLabel5.setText("Katılım Tarihi");
yeniuyeepostatxt.setBackground(new java.awt.Color(153, 255, 153));
yeniuyeyastxt.setBackground(new java.awt.Color(153, 255, 153));
yeniuyeisimtxt.setBackground(new java.awt.Color(153, 255, 153));
yeniuyeisimtxt.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
yeniuyeisimtxtActionPerformed(evt);
}
});
yeniuyekatilimtarihitxt.setBackground(new java.awt.Color(153, 255, 153));
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(yeniuyeyastxt, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(yeniuyeisimtxt, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel4)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(yeniuyeepostatxt, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jLabel5)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(yeniuyekatilimtarihitxt, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(yeniuyeisimtxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(yeniuyeyastxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(yeniuyeepostatxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel5)
.addComponent(yeniuyekatilimtarihitxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(17, Short.MAX_VALUE))
);
yeniuyetable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
yeniuyetable.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
yeniuyetableMouseClicked(evt);
}
});
jScrollPane1.setViewportView(yeniuyetable);
cmd_save.setBackground(new java.awt.Color(0, 0, 0));
cmd_save.setForeground(new java.awt.Color(255, 255, 255));
cmd_save.setText("Kaydet");
cmd_save.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd_saveActionPerformed(evt);
}
});
cmd_save1.setBackground(new java.awt.Color(0, 0, 0));
cmd_save1.setForeground(new java.awt.Color(255, 255, 255));
cmd_save1.setText("Sil");
cmd_save1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd_save1ActionPerformed(evt);
}
});
cmd_save2.setBackground(new java.awt.Color(0, 0, 0));
cmd_save2.setForeground(new java.awt.Color(255, 255, 255));
cmd_save2.setText("Temizle");
cmd_save2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd_save2ActionPerformed(evt);
}
});
cmd_save3.setBackground(new java.awt.Color(0, 0, 0));
cmd_save3.setForeground(new java.awt.Color(255, 255, 255));
cmd_save3.setText("Düzenle");
cmd_save3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd_save3ActionPerformed(evt);
}
});
cmd_save4.setBackground(new java.awt.Color(0, 0, 0));
cmd_save4.setForeground(new java.awt.Color(255, 255, 255));
cmd_save4.setText("Ana Menü");
cmd_save4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd_save4ActionPerformed(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()
.addGap(22, 22, 22)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(cmd_save2)
.addComponent(cmd_save))
.addGap(45, 45, 45)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(cmd_save1)
.addComponent(cmd_save3)))
.addComponent(cmd_save4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 617, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(36, 36, 36)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(40, 40, 40)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(cmd_save)
.addComponent(cmd_save1))
.addGap(40, 40, 40)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(cmd_save3)
.addComponent(cmd_save2))
.addGap(59, 59, 59)
.addComponent(cmd_save4)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 478, Short.MAX_VALUE)
.addContainerGap())
);
setBounds(0, 0, 866, 538);
}// </editor-fold>
private void yeniuyeisimtxtActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void yeniuyetableMouseClicked(java.awt.event.MouseEvent evt) {
try{
int row =yeniuyetable.getSelectedRow();
String Table_click=(yeniuyetable.getModel().getValueAt(row, 0).toString());
String sql ="select * from YeniUyeFrame where İsim='"+Table_click+"' ";
pst=conn.prepareStatement(sql);
rs=pst.executeQuery();
if(rs.next()){
String add1 =rs.getString("İsim");
yeniuyeisimtxt.setText((rs.getString("İsim")).trim());
String add2 =rs.getString("Yaş");
yeniuyeyastxt.setText((rs.getString("Yaş")).trim());
String add3 =rs.getString("EPosta");
yeniuyeepostatxt.setText((rs.getString("EPosta")).trim());
String add4 =rs.getString("KatılımTarihi");
yeniuyekatilimtarihitxt.setText((rs.getString("KatılımTarihi")).trim());
}
}catch(Exception e){
JOptionPane.showMessageDialog(null, e);
}finally{
try{
pst.close();
rs.close();
}catch(Exception e){
}
}
}
private void cmd_saveActionPerformed(java.awt.event.ActionEvent evt) {
try{
String sql = "Insert into YeniUyeFrame (İsim,Yaş,EPosta,KatılımTarihi) values (?,?,?,?)";
pst=conn.prepareStatement(sql);
pst.setString(1, yeniuyeisimtxt.getText());
pst.setString(2, yeniuyeyastxt.getText());
pst.setString(3, yeniuyeepostatxt.getText());
pst.setString(4, yeniuyekatilimtarihitxt.getText());
pst.executeUpdate();
JOptionPane.showMessageDialog(null, "Kaydedildi!");
}
catch(Exception e)
{
e.printStackTrace();
JOptionPane.showMessageDialog(null, e);
}finally{
try{
pst.close();
rs.close();
}catch(Exception e){
}
}
Update_table();
}
private void cmd_save1ActionPerformed(java.awt.event.ActionEvent evt) {
String sql="delete from YeniUyeFrame where İsim =?";
try{
pst=conn.prepareStatement(sql);
pst.setString(1, yeniuyeisimtxt.getText());
pst.executeUpdate();
JOptionPane.showMessageDialog(null, "Silindi");
}catch(Exception e){
JOptionPane.showMessageDialog(null, e);
}
Update_table();
}
private void cmd_save2ActionPerformed(java.awt.event.ActionEvent evt) {
yeniuyeisimtxt.setText("");
yeniuyeyastxt.setText("");
yeniuyeepostatxt.setText("");
yeniuyekatilimtarihitxt.setText("");
}
private void cmd_save3ActionPerformed(java.awt.event.ActionEvent evt) {
try{
String value1=yeniuyeisimtxt.getText();
String value2=yeniuyeyastxt.getText();
String value3=yeniuyeepostatxt.getText();
String value4=yeniuyekatilimtarihitxt.getText();
String sql="update YeniUyeFrame set İsim='"+value1+"' ,Yaş ='"+value2+"',EPosta='"+value3+"',KatılımTarihi='"+value4+"' where İsim='"+value1+"' ";
pst=conn.prepareStatement(sql);
pst.executeUpdate();
JOptionPane.showMessageDialog(null, "Güncellendi");
}catch(Exception e){;
JOptionPane.showMessageDialog(null, e);
}finally{
try{
pst.close();
rs.close();
}catch(Exception e){
}
}
Update_table();
}
private void cmd_save4ActionPerformed(java.awt.event.ActionEvent evt) {
dispose();
SeperateMenu s = new SeperateMenu();
s.setVisible(true);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(YeniUye.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(YeniUye.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(YeniUye.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(YeniUye.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new YeniUye().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton cmd_save;
private javax.swing.JButton cmd_save1;
private javax.swing.JButton cmd_save2;
private javax.swing.JButton cmd_save3;
private javax.swing.JButton cmd_save4;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField yeniuyeepostatxt;
private javax.swing.JTextField yeniuyeisimtxt;
private javax.swing.JTextField yeniuyekatilimtarihitxt;
private javax.swing.JTable yeniuyetable;
private javax.swing.JTextField yeniuyeyastxt;
// End of variables declaration
}
答案 0 :(得分：0)
Android等效JPanel is LinearLayout
equivilent of JButton is Button
JLabel -> TextView
JScrollPane -> ScrollView
JOptionPane -> AlertDialog or Spinner or Dialog取决于您的应用的功能
等同于ResultSet is Cursor - 与ResultSet完全相同
示例：
Cursor c = database.query("SELECT * FROM someTable");
int someValue = c.getInt(someTableColumnIndex);
String someStringValue = c.getString(someTableOtherColumnIndex);
查询：http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html
但是你的代码需要重大改写才能让它在Android上看起来一样
Android主要使用XML布局，但您可以使用代码来创建布局
示例：
public class MainActivity extends Activity{
@Override
public void onCreate(Bundle savedInstanceState){
LinearLayout layout = new LinearLayout(this,new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT); //width and height
Button button = new Button(this);
button.setText("hello");
button.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
Toast.makeText(MainActivity.this,"you clicked me! my text is: "+(Button)v.getText().toString(),Toast.LENGTH_LONG).show();
}
});
}
}
如果你想建立一个表 - Android有TableLayout 仔细看看：http://developer.android.com/reference/android/widget/TableLayout.html