如何使用jdbtable连接mysql数据库? 能否给个例子 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 就是用一个jdbtable同步显示数据库的内容,谢谢! import java.sql.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.*; public class inensshow extends JFrame { private Connection connection; private Statement statement; private ResultSet resultSet; private ResultSetMetaData rsMetaData; //GUI变量定义private JTable table; private JTextArea inputQuery; private JButton submitQuery; public inensshow() { //Form的标题 super( "输入SQL语句,按查询按钮查看结果。" ); String url = "jdbc:mysql://localhost:3306/web"; String username = "inens"; String password = "inens"; //加载驱动程序以连接数据库try { Class.forName( "org.gjt.mm.mysql.Driver" ); connection = DriverManager.getConnection( url, username, password ); } //捕获加载驱动程序异常catch ( ClassNotFoundException cnfex ) { System.err.println( "装载 JDBC/ODBC 驱动程序失败。" ); cnfex.printStackTrace(); System.exit( 1 ); // terminate program } //捕获连接数据库异常catch ( SQLException sqlex ) { System.err.println( "无法连接数据库" ); sqlex.printStackTrace(); System.exit( 1 ); // terminate program } //如果数据库连接成功,则建立GUI//SQL语句String test="SELECT * FROM data"; inputQuery = new JTextArea( test, 4, 30 ); submitQuery = new JButton( "查询" ); //Button事件submitQuery.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { getTable(); } } ); JPanel topPanel = new JPanel(); topPanel.setLayout( new BorderLayout() ); //将"输入查询"编辑框布置到 "CENTER"topPanel.add( new JScrollPane( inputQuery), BorderLayout.CENTER ); //将"提交查询"按钮布置到 "SOUTH"topPanel.add( submitQuery, BorderLayout.SOUTH ); table = new JTable(); Container c = getContentPane(); c.setLayout( new BorderLayout() ); //将"topPanel"编辑框布置到 "NORTH"c.add( topPanel, BorderLayout.NORTH ); //将"table"编辑框布置到 "CENTER"c.add( table, BorderLayout.CENTER ); getTable(); setSize( 500, 300 ); //显示Formshow(); } private void getTable() { try { //执行SQL语句String query = inputQuery.getText(); statement = connection.createStatement(); resultSet = statement.executeQuery( query ); //在表格中显示查询结果displayResultSet( resultSet ); } catch ( SQLException sqlex ) { sqlex.printStackTrace(); } } private void displayResultSet( ResultSet rs ) throws SQLException { //定位到达第一条记录boolean moreRecords = rs.next(); //如果没有记录,则提示一条消息if ( ! moreRecords ) { JOptionPane.showMessageDialog( this, "结果集中无记录" ); setTitle( "无记录显示" ); return; } Vector columnHeads = new Vector(); Vector rows = new Vector(); try { //获取字段的名称ResultSetMetaData rsmd = rs.getMetaData(); for ( int i = 1; i <= rsmd.getColumnCount(); ++i ) columnHeads.addElement( rsmd.getColumnName( i ) ); //获取记录集do { rows.addElement( getNextRow( rs, rsmd ) ); } while ( rs.next() ); //在表格中显示查询结果table = new JTable( rows, columnHeads ); JScrollPane scroller = new JScrollPane( table ); Container c = getContentPane(); c.remove(1); c.add( scroller, BorderLayout.CENTER ); //刷新Tablec.validate(); } catch ( SQLException sqlex ) { sqlex.printStackTrace(); } } private Vector getNextRow( ResultSet rs, ResultSetMetaData rsmd ) throws SQLException { Vector currentRow = new Vector(); for ( int i = 1; i <= rsmd.getColumnCount(); ++i ) currentRow.addElement( rs.getString( i ) ); //返回一条记录 return currentRow; } public void shutDown() { try { //断开数据库连接connection.close(); } catch ( SQLException sqlex ) { System.err.println( "Unable to disconnect" ); sqlex.printStackTrace(); } } public static void main( String args[] ) { final inensshow app = new inensshow(); app.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { app.shutDown(); System.exit( 0 ); } } ); } } 用SAXparser解析xml文件时老是提示找不到文件,我以经把路径给它了啊 tomcat报错:conn.rollback();中conn can't be resolved .急!请各位高手不吝赐教啊 几个小问题 [Java]怎么显示更新后的数据 简单问题:截取字符串函数 如何对hashmap按value值排序?求简单的方法 jre与jdk的区别? 一个按扭,按下后可以发出声音 如果我已经把图像做成二进制了,怎么在程序中将这些二进制流转化为图像 如何进行简体转换繁体?SOS,请大家帮帮忙! 急求怎样由byte[]构造Image对象用于绘图 java 时间问题,请帮忙
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*; public class inensshow extends JFrame {
private Connection connection;
private Statement statement;
private ResultSet resultSet;
private ResultSetMetaData rsMetaData; //GUI变量定义
private JTable table;
private JTextArea inputQuery;
private JButton submitQuery; public inensshow()
{
//Form的标题
super( "输入SQL语句,按查询按钮查看结果。" ); String url = "jdbc:mysql://localhost:3306/web";
String username = "inens";
String password = "inens";
//加载驱动程序以连接数据库
try {
Class.forName( "org.gjt.mm.mysql.Driver" );
connection = DriverManager.getConnection(
url, username, password );
}
//捕获加载驱动程序异常
catch ( ClassNotFoundException cnfex ) {
System.err.println(
"装载 JDBC/ODBC 驱动程序失败。" );
cnfex.printStackTrace();
System.exit( 1 ); // terminate program
}
//捕获连接数据库异常
catch ( SQLException sqlex ) {
System.err.println( "无法连接数据库" );
sqlex.printStackTrace();
System.exit( 1 ); // terminate program
}
//如果数据库连接成功,则建立GUI
//SQL语句
String test="SELECT * FROM data";
inputQuery = new JTextArea( test, 4, 30 );
submitQuery = new JButton( "查询" );
//Button事件
submitQuery.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent e )
{
getTable();
}
}
); JPanel topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
//将"输入查询"编辑框布置到 "CENTER"
topPanel.add( new JScrollPane( inputQuery), BorderLayout.CENTER );
//将"提交查询"按钮布置到 "SOUTH"
topPanel.add( submitQuery, BorderLayout.SOUTH );
table = new JTable();
Container c = getContentPane();
c.setLayout( new BorderLayout() );
//将"topPanel"编辑框布置到 "NORTH"
c.add( topPanel, BorderLayout.NORTH );
//将"table"编辑框布置到 "CENTER"
c.add( table, BorderLayout.CENTER );
getTable();
setSize( 500, 300 );
//显示Form
show();
} private void getTable()
{
try {
//执行SQL语句
String query = inputQuery.getText();
statement = connection.createStatement();
resultSet = statement.executeQuery( query );
//在表格中显示查询结果
displayResultSet( resultSet );
}
catch ( SQLException sqlex ) {
sqlex.printStackTrace();
}
} private void displayResultSet( ResultSet rs )
throws SQLException
{
//定位到达第一条记录
boolean moreRecords = rs.next();
//如果没有记录,则提示一条消息
if ( ! moreRecords ) {
JOptionPane.showMessageDialog( this,
"结果集中无记录" );
setTitle( "无记录显示" );
return;
}
Vector columnHeads = new Vector();
Vector rows = new Vector();
try {
//获取字段的名称
ResultSetMetaData rsmd = rs.getMetaData();
for ( int i = 1; i <= rsmd.getColumnCount(); ++i )
columnHeads.addElement( rsmd.getColumnName( i ) );
//获取记录集
do {
rows.addElement( getNextRow( rs, rsmd ) );
} while ( rs.next() );
//在表格中显示查询结果
table = new JTable( rows, columnHeads );
JScrollPane scroller = new JScrollPane( table );
Container c = getContentPane();
c.remove(1);
c.add( scroller, BorderLayout.CENTER );
//刷新Table
c.validate();
}
catch ( SQLException sqlex ) {
sqlex.printStackTrace();
}
}
private Vector getNextRow( ResultSet rs,
ResultSetMetaData rsmd )
throws SQLException
{
Vector currentRow = new Vector();
for ( int i = 1; i <= rsmd.getColumnCount(); ++i )
currentRow.addElement( rs.getString( i ) );
//返回一条记录
return currentRow;
} public void shutDown()
{
try {
//断开数据库连接
connection.close();
}
catch ( SQLException sqlex ) {
System.err.println( "Unable to disconnect" );
sqlex.printStackTrace();
}
} public static void main( String args[] )
{
final inensshow app =
new inensshow();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e )
{
app.shutDown();
System.exit( 0 );
}
}
);
}
}