java代码实现截图功能(屏幕截图)

import java.awt.dimension;
import java.awt.rectangle;
import java.awt.robot;
import java.awt.toolkit;
import java.awt.image.bufferedimage;
import java.io.file;

import javax.imageio.imageio;

/*******************************************************************
 * 该javabean可以直接在其他java应用程序中调用，实现屏幕的"拍照"
 * this javabean is used to snapshot the gui in a
 * java application! you can embeded
 * it in to your java application source code, and us
 * it to snapshot the right gui of the application
 * @see javax.imageio
 * @author liluqun
 * @version 1.0
 *****************************************************/

public class test
{
 private string filename; //文件的前缀
 private string defaultname = "guicamera";
 static int serialnum=0;
 private string imageformat; //图像文件的格式
 private string defaultimageformat="png";
 dimension d = toolkit.getdefaulttoolkit().getscreensize();

 /****************************************************************
 * 默认的文件前缀为guicamera，文件格式为png格式
 * the default construct will use the default
 * image file surname "guicamera",
 * and default image format "png"
 ****************************************************************/
 public test() {
 filename = defaultname;
 imageformat=defaultimageformat;

 }

 /****************************************************************
 * @param s the surname of the snapshot file
 * @param format the format of the image file,
 * it can be "jpg" or "png"
 * 本构造支持jpg和png文件的存储
 ****************************************************************/
 public test(string s,string format) {

 filename = s;
 imageformat=format;
 }

 /****************************************************************
 * 对屏幕进行拍照
 * snapshot the gui once
 ****************************************************************/
 public void snapshot() {

 try {
 //拷贝屏幕到一个bufferedimage对象screenshot
 bufferedimage screenshot = (new robot()).createscreencapture(new
 rectangle(0, 0, (int) d.getwidth(), (int) d.getheight()));
 serialnum++;
 //根据文件前缀变量和文件格式变量，自动生成文件名
 string name=filename+string.valueof(serialnum)+"."+imageformat;
 file f = new file(name);
 system.out.print("save file "+name);
 //将screenshot对象写入图像文件
 imageio.write(screenshot, imageformat, f);
 system.out.print("..finished!\n");
 }
 catch (exception ex) {
 system.out.println(ex);
 }
 }

 public static void main(string[] args)
 {
 test cam= new test("d:\\hello", "png");//

 cam.snapshot();
 }
}