Java JTable-Won';插入后不显示数据
所以我对java和netbeans有点陌生,但我写了一段代码从数据库加载一些数据并在JTable中显示,当我几天前做这件事时,它工作得很好,显示了所有内容,但当我今天打开它时,它不会显示任何内容,我真的不知道为什么,我几乎检查了所有内容。 代码如下: 注意:我上传了所有的代码以备需要,但您可能应该检查执行插入的按钮btnLoad的方法Java JTable-Won';插入后不显示数据,java,swing,netbeans,jtable,Java,Swing,Netbeans,Jtable,所以我对java和netbeans有点陌生,但我写了一段代码从数据库加载一些数据并在JTable中显示,当我几天前做这件事时,它工作得很好,显示了所有内容,但当我今天打开它时,它不会显示任何内容,我真的不知道为什么,我几乎检查了所有内容。 代码如下: 注意:我上传了所有的代码以备需要,但您可能应该检查执行插入的按钮btnLoad的方法 package cinemaohadid; import java.awt.Component; import java.sql.Connection; impo
package cinemaohadid;
import java.awt.Component;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
public class AllMovies extends javax.swing.JFrame {
public AllMovies() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jScrollPane1 = new javax.swing.JScrollPane();
tblAllMovies = new javax.swing.JTable();
btnLoad = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Watch All Movies");
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 325, Short.MAX_VALUE)
);
tblAllMovies.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"ID", "Title", "Genre", "Show Time"
}
) {
Class[] types = new Class [] {
java.lang.Integer.class, java.lang.String.class, java.lang.String.class, java.lang.Object.class
};
boolean[] canEdit = new boolean [] {
false, false, false, false
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit [columnIndex];
}
});
tblAllMovies.setPreferredSize(new java.awt.Dimension(400, 0));
jScrollPane1.setViewportView(tblAllMovies);
tblAllMovies.getColumnModel().getSelectionModel().setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
if (tblAllMovies.getColumnModel().getColumnCount() > 0) {
tblAllMovies.getColumnModel().getColumn(0).setMinWidth(20);
tblAllMovies.getColumnModel().getColumn(0).setPreferredWidth(20);
tblAllMovies.getColumnModel().getColumn(1).setPreferredWidth(200);
tblAllMovies.getColumnModel().getColumn(2).setPreferredWidth(60);
tblAllMovies.getColumnModel().getColumn(3).setResizable(false);
tblAllMovies.getColumnModel().getColumn(3).setPreferredWidth(120);
}
btnLoad.setText("Load");
btnLoad.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnLoadActionPerformed(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()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 488, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(btnLoad)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(btnLoad)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 275, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void btnLoadActionPerformed(java.awt.event.ActionEvent evt) {
String user = "aa";
String pass = "aa";
String host = "jdbc:derby://localhost:1527/Results";
DefaultTableModel dtm = (DefaultTableModel) tblAllMovies.getModel();
Connection con;
try {
con = DriverManager.getConnection(host, user, pass);
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String SQL = "SELECT * FROM Movies";
ResultSet rs = stmt.executeQuery(SQL);
int rowcount=-1;
while (rs.next()) {
rowcount++;
int movieID = rs.getInt("MOVIEID");
String movieName = rs.getString("MOVIENAME");
Timestamp movieTime = rs.getTimestamp("MOVIETIME");
String movieGenre = rs.getString("MOVIEGENRE");
dtm.addRow(new Object[]{movieID,movieName ,movieGenre ,movieTime});
}
dtm.fireTableDataChanged();
stmt.close();
rs.close();
} catch (SQLException err) {
System.out.println(err.getMessage());
}
//btnLoad.setVisible(false);
}
public static void main(String args[]) {
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(AllMovies.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(AllMovies.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(AllMovies.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(AllMovies.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new AllMovies().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton btnLoad;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable tblAllMovies;
// End of variables declaration
}
package-cinemaohadid;
导入java.awt.Component;
导入java.sql.Connection;
导入java.sql.DriverManager;
导入java.sql.ResultSet;
导入java.sql.SQLException;
导入java.sql.Statement;
导入java.sql.Timestamp;
导入java.text.simpleDataFormat;
导入java.util.*;
导入javax.swing.JOptionPane;
导入javax.swing.JTable;
导入javax.swing.table.DefaultTableModel;
导入javax.swing.table.TableColumn;
公共类AllMovies扩展了javax.swing.JFrame{
公共电影{
初始化组件();
}
@抑制警告(“未选中”)
//
私有组件(){
jPanel1=newjavax.swing.JPanel();
jScrollPane1=newjavax.swing.JScrollPane();
tblAllMovies=newjavax.swing.JTable();
btnLoad=newjavax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
片名(“观看所有电影”);
javax.swing.GroupLayout jPanel1Layout=新的javax.swing.GroupLayout(jPanel1);
setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,0,短.MAX_值)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,325,短。最大值)
);
setModel(新的javax.swing.table.DefaultTableModel(
新对象[][]{
},
新字符串[]{
“ID”、“标题”、“流派”、“演出时间”
}
) {
类[]类型=新类[]{
java.lang.Integer.class、java.lang.String.class、java.lang.String.class、java.lang.Object.class
};
boolean[]canEdit=新的boolean[]{
假,假,假,假
};
公共类getColumnClass(int columnIndex){
返回类型[列索引];
}
公共布尔值isCellEditable(int-rowIndex、int-columnIndex){
返回canEdit[columnIndex];
}
});
setPreferredSize(新的java.awt.Dimension(400,0));
jScrollPane1.setViewportView(tblAllMovies);
tblAllMovies.getColumnModel().getSelectionModel().setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
if(tblAllMovies.getColumnModel().getColumnCount()>0){
tblAllMovies.getColumnModel().getColumn(0).setMinWidth(20);
tblAllMovies.getColumnModel().getColumn(0).setPreferredWidth(20);
tblAllMovies.getColumnModel().getColumn(1).setPreferredWidth(200);
tblAllMovies.getColumnModel().getColumn(2).setPreferredWidth(60);
tblAllMovies.getColumnModel().getColumn(3).setResizeable(false);
tblAllMovies.getColumnModel().getColumn(3).setPreferredWidth(120);
}
btnLoad.setText(“加载”);
btnLoad.addActionListener(新的java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
btnLoadActionPerformed(evt);
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED\u SIZE,488,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(18,18,18)
.addComponent(btnLoad)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel1,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u值)
.addContainerGap())
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1、javax.swing.GroupLayout.Alignment.TRAILING、javax.swing.GroupLayout.DEFAULT\u SIZE、javax.swing.GroupLayout.DEFAULT\u SIZE、Short.MAX\u值)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.training)
.addComponent(btnLoad)
.addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED_SIZE,275,javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u VALUE))
);
包装();
}//
私有void btnLoadActionPerformed(java.awt.event.ActionEvent evt){
字符串user=“aa”;
字符串pass=“aa”;
String host=“jdbc:derby://localhost:1527/Results";
DefaultTableModel dtm=(DefaultTableModel)tblAllMovies.getModel();
连接con;
试一试{
con=DriverManager.getConnection(主机、用户、通行证);
语句stmt=con.createStatement(ResultSet.TYPE\u SCROLL\u敏感,ResultSet.CONCUR\u可更新);
String SQL=“从电影中选择*”;
结果集rs=stmt.executeQuery(SQL);
int rowcount=-1;
while(rs.next()){
行计数++;
int movieID=rs.getInt(“movieID”);
String movieName=rs.getString(“movieName”);
时间戳movieTime=rs.getTimestamp(“movieTime”);
String movieGenre=rs.getString(“movieGenre”);
addRow(新对象[]{movieID,movieName,movieGenre,movieTime}
class MovieTableModel extends DefaultTableModel {
private static boolean[] canEdit = new boolean[] {false, false, false, false};
public MovieTableModel() {
super();
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit[columnIndex]; // or just return false if it's always going to be false
}
}
private void btnLoadActionPerformed(java.awt.event.ActionEvent evt) {
String user = "aa";
String pass = "aa";
String host = "jdbc:derby://localhost:1527/Results";
Connection con;
try {
con = DriverManager.getConnection(host, user, pass);
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String SQL = "SELECT * FROM Movies";
ResultSet rs = stmt.executeQuery(SQL);
MovieTableModel mtm = new MovieTableModel();
mtm.addColumn("ID");
mtm.addColumn("Title");
mtm.addColumn("Genre");
mtm.addColumn("Show Time");
Vector<Object> row;
while (rs.next()) {
row = new Vector<Object>();
row.add(rs.getInt("MOVIEID"));
row.add(rs.getString("MOVIENAME"));
row.add(rs.getTimestamp("MOVIETIME"));
row.add(rs.getString("MOVIEGENRE"));
mtm.addRow(row);
}
tblAllMovies = new JTable(mtm);
stmt.close();
rs.close();
pack();
} catch (SQLException err) {
System.out.println(err.getMessage());
}
}
//dtm.addRow(new Object[]{movieID,movieName ,movieGenre ,movieTime});
Vector<Object> row = new Vector<Object>();
row.addElement(movieID);
row.addElement(movieName);
row.addElement(movieGenre);
row.addElement(movieTime);
private void btnLoadActionPerformed(java.awt.event.ActionEvent evt)
{
DefaultTableModel dtm = (DefaultTableModel) tblAllMovies.getModel();
dtm.addRow( new Object[]{new Integer(1), "movieName1" , "movieGenre1", "movieTime1"} );
dtm.addRow( new Object[]{new Integer(2), "movieName2" , "movieGenre2", "movieTime2"} );
dtm.addRow( new Object[]{new Integer(3), "movieName3" , "movieGenre3", "movieTime3"} );
dtm.addRow( new Object[]{new Integer(4), "movieName4" , "movieGenre4", "movieTime4"} );
}
tblAllMovies.setPreferredSize(new java.awt.Dimension(400, 0));
JScrollPane scrollPane = new JScrollPane(table);
frame.add(scrollPane, BorderLayout.CENTER);
Box east = Box.CreateVerticalBox();
east.add(Box.createVerticalGlue());
east.add(button);
frame.add(east, BorderLayout.LINE_END);