处理长时间的任务的时候常需要进度条显示，有几种实现方式
1，普通的进度条
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class TestProgress 
{
static boolean stopflg = false;
/** *//**
* Launch the application
* @param args
*/
public static void main(String[] args) throws Exception{
final Display display = Display.getDefault();
final Shell shell = new Shell();
shell.setSize(500, 375);
shell.setText("SWT Application");
//
IRunnableWithProgress runnable = new IRunnableWithProgress(){
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
monitor.beginTask("generate", 30);
for(int i=0;i<100;i++){
if(monitor.isCanceled()){
return;
}
monitor.worked(1);
Thread.sleep(50);
}
monitor.done();
}
};
new ProgressMonitorDialog(shell).run(true, true, runnable);
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}
}
2,反复循环的进度条
import java.lang.reflect.InvocationTargetException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class TestProgress {
static boolean stopflg = false;
/** *//**
* Launch the application
* @param args
*/
public static void main(String[] args) throws Exception{
final Display display = Display.getDefault();
final Shell shell = new Shell();
shell.setSize(500, 375);
shell.setText("SWT Application");
//
IRunnableWithProgress runnable = new IRunnableWithProgress(){
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
monitor.beginTask("generate", 30);
int i=0;
while(true){
if(stopflg){
break;
}
i++;
if(i==30){
i=0;
monitor.beginTask("generate", 30);
}
monitor.worked(1);
Thread.sleep(100);
}
monitor.done();
}
};
new ProgressMonitorDialog(shell).run(true, true, runnable);
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
}
}
3,rcp中后台任务的进度条
使用Job建立后台任务，只需要设置job.setUser(true)进度条就出现了，和上边一样，进度条需要自己来控制进度。如果做一个cool的进度条，就看你如何让进度条显示出实际的任务进程。