JAVA中怎样获取文件夹里的图片并把图片在Panel里显示出来

这是第一个程序文件：

import javaawt;

import javaxswing;

public class ImagePanel extends JPanel {

private Image img;

public ImagePanel(Image img) {

thisimg = img;

Dimension size = new Dimension(imggetWidth(null),

imggetHeight(null));

setSize(size);

setPreferredSize(size);

setMinimumSize(size);

setMaximumSize(size);

setLayout(null);

}

public void paintComponent(Graphics g) {

gdrawImage(img,0,0,null);

}

}

这是第二个：

import javaawt;

import javaxswing;

public class ImageTest {

public static void main(String[] args) {

ImagePanel panel = new ImagePanel(new

ImageIcon("images/01jpg")getImage());

JFrame frame = new JFrame("多问自己，会使你少犯错误！");

framegetContentPane()add(panel);

framepack();

framesetVisible(true);

}

}

try{

File _file = new File("C:/Documents and Settings/mayuanfei/My Documents/女友照片jpg"); //读入文件

Image src = javaximageioImageIOread(_file); //构造Image对象

int wideth=srcgetWidth(null); //得到源图宽

int height=srcgetHeight(null); //得到源图长

Systemoutprintln(wideth+","+height);

}catch(Exception e){

eprintStackTrace();

}

private static final String imgDir="C:/Program Files/Tencent/TM2009/Users/273367058/FileRecv";//这里填上目录全名就行了

static{

try{

File dir = new File(imgDir);

File[] imgFiles = dirlistFiles(new FilenameFilter(){

public boolean accept(File dir, String name) {

return nametoLowerCase()endsWith("jpg");

}

});

String imageUrl=">

大概思路就是下面这样了width=|x1-x2|,high=|y1-y2|

class ScreenCapture

{

/

@param args

/

private Robot robot = null;

private Rectangle scrRect = null;

int x1,y1;

int width,high;

public ScreenCapture()

{

try

{

robot = new Robot();

}

catch (Exception ex)

{

Systemoutprintln(extoString());

}

scrRect = new Rectangle(x1, y1, width, height);

}

public BufferedImage captureScreen()

{

BufferedImage bufImg = null;

try

{

bufImg = robotcreateScreenCapture(scrRect);

}

catch (Exception e)

{

Systemoutprintln(etoString());

}

return bufImg;

}

}

上传 后台获取的时候直接从数据库拿路径

下面这是servlet的内容：

package demo;

import javaioFile;

import javaioIOException;

import javaioPrintWriter;

import javautilList;

import javaxservletServletException;

import javaxservlet>

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