import java.awt.Dimension;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;

public class CopyOfTest extends JPanel implements Runnable {

TableModel dataModel;
JScrollPane scrollpane;
JTable table;

public CopyOfTest() {
dataModel = getTableModel();
table = new JTable(dataModel);
scrollpane = new JScrollPane(table);
this.add(scrollpane);
}

//读取外部文件，每一行当做一条字符串存入List中
public List<String> getData() {
FileReader fr;
File file = new File(
"E:/my.txt");
int b;
StringBuffer sb = new StringBuffer();
List<String> s = new ArrayList<String>();
try {
fr = new FileReader(file);
while ((b = fr.read()) != -1) {
if (b != ‘\r‘) {
sb.append((char) b);
}
if (b == ‘\n‘) {
s.add(sb.toString());
sb = new StringBuffer();
}
}
fr.close();
} catch (Exception e) {
e.printStackTrace();
}
return s;
}

//使用public List<String> getData() 方法得到的List构建数据模型
//此处使用的外部文件中，每一行的字符串用空格分成四个部分
//例如，其中一行为：2013-03-18 11:50:55 传感器1 报警，对应表格的一行
public AbstractTableModel getTableModel() {
return new AbstractTableModel() {
public int getColumnCount() {
return 4;
}
public int getRowCount() {
return getData().size();
}
public Object getValueAt(int row, int col) {
switch (col) {
case (0): {
return row + 1;
}
case (1): {
return getData().get(row).split(" ", 0)[0];
}
case (2): {
return getData().get(row).split(" ", 0)[1];
}
default:
return getData().get(row).split(" ", 0)[2];
}
}
};
}

public void run() {
while (true) {
//每隔1秒钟更新JTable
table.validate();
table.updateUI();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
public static void main(String[] g) {
JFrame frame = new JFrame();
CopyOfTest t = new CopyOfTest();
frame.add(t);
frame.setSize(new Dimension(400, 400));
frame.setVisible(true);
new Thread(t).start();
}
}