java本地圖片顯示

A. 請教如何用java語言讀取jpg圖片，並顯示

1、獲取文件夾的路徑 2、得到文件夾中的有圖片的名稱，可以存到數組或者集合中 3、你再到jsp頁面做顯示， 4、下面是獲取路徑和文件名的代碼，前台顯示的代碼自己寫 String path = 文件夾路徑; String names = ""; try { File f = new File(path)

B. 在窗體中，java顯示圖片怎麼做

下面是一個JAVA顯示圖片的例子，請參考：
package com.tarena.java;
import t.Image;
import .File;
import .IOException;
import ageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
/**
* 載入顯示圖象,需要JDK1.5或以上
*/
public class showtu extends JFrame {
public showtu(String bmpFile) {
Image image = null;
try {
image = ad(new File(bmpFile));
} catch (IOException ex) {
}
JLabel label = new JLabel(new ImageIcon(image));
add(label);
setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
}

public static void main(String[] args){
final String fileName = "F:\\456備用\\亮個相.JPG"; //換成你要顯示的圖片

vokeLater(new Runnable(){
public void run(){
new showtu(fileName).setVisible(true);
}
});
}
}

C. java怎麼顯示本地圖片

在面板上搞一個和面板一樣大的JLabel
然後，通過JFileChooser獲得路徑，利用這個圖片的路徑，構建一個ImageIcon
最後，根據這個ImageIcon去給JLabel對象setIcon(ImageIcon對象);

具體地：
1.panel.add(label,BorderLayout.CENTER);
2.ImageIcon icon = new ImageIcon(url);
3.label.setIcon(icon);

下面的代碼你把 .JPG改成BMP試試看，O(∩_∩)O~
package com.shlq.sample;

import java.awt.BorderLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class ImagePane extends JPanel
{
JLabel jl = null;
ImageIcon img = null;

public ImagePane()
{
img = new ImageIcon( "E:\\Picture\\1.jpg ");
jl = new JLabel(img);
this.setLayout(new BorderLayout());
this.add(jl, BorderLayout.CENTER);
}
public static void main(String[] args)
{
JFrame test = new JFrame( "Image Pane ");
test.getContentPane().add(new ImagePane());
test.pack();
test.setVisible(true);
test.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
}
}

D. java如何讀取文件夾中的圖片並在界面顯示

下面給你提供一個實現，該實現採用了代理模式。這個實現包含兩個文件，分別是Client.java和ImageIcoProxy.java，ImageIcoProxy.java負責了圖片的延遲載入，你可以修改為不延遲即可。

Client.java的代碼為：
import java.awt.Graphics;
import java.awt.Insets;

import javax.swing.Icon;
import javax.swing.JFrame;

public class Client extends JFrame {
private static int IMG_WIDTH = 510;
private static int IMG_HEIGHT = 317;
private Icon imgProxy = null;
public static void main(String[] args) {
Client app = new Client();
app.setVisible(true);
}

public Client() {
super("Virture Proxy Client");
imgProxy = new ImageIcoProxy("D:/test.jpg", IMG_WIDTH, IMG_HEIGHT);
this.setBounds(100, 100, IMG_WIDTH + 10, IMG_HEIGHT + 30);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void paint(Graphics g) {
super.paint(g);
Insets insets = getInsets();
imgProxy.paintIcon(this, g, insets.left, insets.top);
}
}

ImageIcoProxy.java的代碼為：
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.SwingUtilities;

public class ImageIcoProxy implements Icon {

private ImageIcon realIcon = null;
private String imgName;
private int width;
private int height;
boolean isIconCreated = false;
public ImageIcoProxy(String imgName, int width, int height) {
this.imgName = imgName;
this.width = width;
this.height = height;
}

public int getIconHeight() {
return realIcon.getIconHeight();
}

public int getIconWidth() {
return realIcon.getIconWidth();
}

public void paintIcon(final Component c, Graphics g, int x, int y) {
if (isIconCreated) {
//已經載入了圖片，直接顯示
realIcon.paintIcon(c, g, x, y);
g.drawString("Just Test", x + 20, y + 370);
} else {
g.drawRect(x, y, width-1, height-1);
g.drawString("Loading photo...", x+20, y+20);
synchronized(this) {
SwingUtilities.invokeLater(new Runnable() {

public void run() {
try {
Thread.currentThread().sleep(2000);
realIcon = new ImageIcon(imgName);
isIconCreated = true;
} catch (Exception e) {
e.printStackTrace();
}
c.repaint();
}

}
);
}
}
}

}