分享ProgressMonitorInputStream之用法--进度条展示

import java.io.FileInputStream;

import javax.swing.ProgressMonitor;
import javax.swing.ProgressMonitorInputStream;

public class ProgressMonitorTest {
	public static void main(String args[]) throws Exception {
		// declare ProgressMonitorInputStream Object
		ProgressMonitorInputStream monitor;
		/**
		 * @param 表示此进度条要依附在哪个组件上
		 * @param 显示在此进度条上的消息
		 * @param 需要监控的输入流
		 */
		monitor = new ProgressMonitorInputStream(null, "Loading ",
				new FileInputStream("filename path"));

		/**
		 * 得到与此监控流相对应的监控对象
		 */
		ProgressMonitor progressMonitor = monitor.getProgressMonitor();

		int read_unit = 2;// 设置每次读取的字节数
		int all = monitor.available();// 得到目标文件的总字节数
		int readed = 0;// 每次实际读取到的字节数
		byte[] data = new byte[read_unit];// 字节数组，保存读取到的字节数
		while (monitor.available() > 0) {
			Thread.sleep(1);// 故意放慢速度好看清进度条
			int in = monitor.read(data);
			readed += in;
			// System.out.write(data);
			float process = (float) readed / all * 100;// 算出百分比
			// System.out.println("archived " + process + " %");
			progressMonitor.setNote("archived " + process + " %");// 显示在进度条上
		}
	}
}