java代码实现界面刷新，java如何刷新界面

java中如何用response编写一个刷新页面,实现每两秒钟刷新一次？

%@ page language="java" contentType="text/html;charset=gb2312" import="java.util.*" %

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

html

head

/head

body

%

response.addIntHeader("Refresh",2);

%

h42秒刷新一次/h4

/body

/html

Java如何实现自动刷新

while (rs.next()) {

rowData[i][0] = rs.getString("exam_No");

rowData[i][1] = rs.getString("student_ID");

rowData[i][2] = rs.getString("student_Name");

rowData[i][3] = rs.getString("class_NO");

rowData[i][4] = rs.getString("course_Name");

rowData[i][5] = rs.getString("result");

i++;

}

//在此处添加如下代码:

xxxxxxxxxxxx_model.fireTableDataChanged();

//或:

table.setModel(new XxxxxxxxxxTableModel(rowData,.......));

解决方法1:

如果你的表格模型扩展自AbstractTableModel,

表格数据改变后,则调用模型的fireTableDataChanged()方法;

解决方法2:

重新设置表格模型.

例如:

table.setModel(new DefaultTableModel(data,columnNames));

下面是我写的一个上例子.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.table.*;

public class JTableTest

{

public static void main(String args[])

{

JTableTestFrame f=new JTableTestFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

}

class JTableTestFrame extends JFrame

{

private JTable table=null;

private ArrayTableModel atm=null;

private JButton reload=null;

private final static String[] columnNames={"Number","addend","augend","sum"};

private int start=0;

public JTableTestFrame()

{

atm=new ArrayTableModel(columnNames);

table=new JTable(atm);

reload=new JButton("Reload");

reload.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e)

{

reload();

}

});

JPanel p=new JPanel(new BorderLayout());

p.add(new JLabel("JTable Test"),BorderLayout.NORTH);

p.add(new JScrollPane(table),BorderLayout.CENTER);

p.add(reload,BorderLayout.SOUTH);

this.add(p);

this.setSize(300,300);

this.setVisible(true);

}

public void reload()

{

int rows=10;

int cols=columnNames.length;

Object[][] data=new Object[rows][cols];

for(int i=0;irows;i++)

{

start+=i;

data[i][0]=start;

data[i][1]=start+1;

data[i][2]=start+2;

data[i][3]=start*2+3;

}

atm.setData(data);

atm.fireTableDataChanged();

}

}

class ArrayTableModel extends AbstractTableModel

{

private String[] columnNames=null;

private Object[][] data=null;

public ArrayTableModel(String[] columnNames)

{

this.columnNames=columnNames;

this.data=new Object[1][columnNames.length];

}

public ArrayTableModel(Object[][] data,String[] columnNames)

{

this.data=data;

this.columnNames=columnNames;

}

public Object getValueAt(int r,int c)

{

return this.data[r][c];

}

public int getRowCount()

{

return this.data.length;

}

public int getColumnCount()

{

return this.columnNames.length;

}

public String[] getColumnNames() {

return columnNames;

}

public String getColumnName(int c)

{

return this.columnNames[c].toString();

}

public void setColumnNames(String[] columnNames) {

this.columnNames = columnNames;

}

public Object[][] getData() {

return data;

}

public void setData(Object[][] data) {

this.data = data;

}

}

用java编写的swing程序。如何在主界面中实现刷新的功能，就是让主界面的组件刷新

重新加载，先调用MainPanel的removeAII(),再重新添加，最后validate()。或者是MainFrame.getContentPane.removeAII()，总之要remove掉再添加，再validate

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