java图片浏览插件

㈠ 请教java高手们，帮我写一个java编写的图片浏览器，功能如下：有自动浏览功能，每隔几秒图片自动翻页。用

//改编的，CopyOfImageViewer.java打开一个有图片的文件夹就可浏览了。

//MP3播放相关库到:http://www.javazoom.net/javalayer/sources.html下载

//将下载到的zip文件里的jl1.0.1.jar复制到JDK目录下的jre/lib/ext/目录里即可.

//将源代码main方法里的playMp3("d:\bad.mp3");改成自己的地址，换种方法BMP是可以支持的，这里不行暂不讨论。

importjava.awt.*;

importjava.awt.event.*;

importjava.io.*;

importjavax.swing.*;

importjavazoom.jl.player.Player;

,Runnable{

JPanelbts;

JLabelpl;

jscrollPanejsp;

JButtoncf,start,next,prev,stop;

JFramef;

JFileChooserfc;

File[]sf;

intindex;

Threadauto;

booleanautoFlag;

intdelay=5*1000;

//这里就是GUI布局

CopyOfImageViewer(){

pl=newJLabel();

pl.setHorizontalAlignment(JLabel.CENTER);

jsp=newJScrollPane(pl);

start=newJButton("start");

next=newJButton(">");

prev=newJButton("<");

stop=newJButton("stop");

bts=newJPanel(newFlowLayout(FlowLayout.CENTER));

bts.add(start);

bts.add(prev);

bts.add(next);

bts.add(stop);

cf=newJButton("Selectapicturefolder");

fc=newJFileChooser();

fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);

f=newJFrame();

f.setDefaultCloseOperation(3);

f.getContentPane().add(cf,"North");

f.getContentPane().add(jsp,"Center");

f.getContentPane().add(bts,"South");

f.setSize(400,300);

f.setLocationRelativeTo(null);

f.setVisible(true);

//给按钮加入事件侦听器

start.addActionListener(this);

next.addActionListener(this);

prev.addActionListener(this);

stop.addActionListener(this);

cf.addActionListener(this);

auto=newThread(this);

auto.start();

}

publicstaticvoidmain(String[]args){

try{

UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");

}catch(Exceptione){

try{

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

}catch(Exceptione2){}

}

newCopyOfImageViewer();

playMp3("d:\bad.mp3");

}

//简单MP3播放

privatestaticvoidplayMp3(Stringfile){

try{

Playerp=newPlayer(newFileInputStream(file));

p.play();

}catch(Exceptione){}

}

//处理各按键事件

publicvoidactionPerformed(ActionEvente){

Objectsrc=e.getSource();

if(src==cf){

into=fc.showOpenDialog(f);

if(o==JFileChooser.APPROVE_OPTION){

sf=fc.getSelectedFile().listFiles(newFilenameFilter(){

//合法的文件后缀

String[]suf={".PNG",".GIF",".JPG",};

publicbooleanaccept(Filedir,Stringname){

name=name.toUpperCase();

for(inti=0;i<suf.length;i++)

if(name.endsWith(suf[i]))returntrue;

returnfalse;

}

});

if(sf.length>0){

index=0;

showPic();

}

}

}

if(sf==null||sf.length==0)return;

if(src==start)startB();

elseif(src==stop)stopB();

elseif(src==next)next();

elseif(src==prev)prev();

}

voidprev(){

index=--index<0?sf.length-1:index;

showPic();

}

voidnext(){

index=++index>sf.length-1?0:index;

showPic();

}

publicvoidrun(){

while(true){

if(sf!=null&&sf.length>0&&autoFlag){

try{Thread.sleep(delay);}catch(Exceptione){}

next();

}

try{Thread.sleep(100);}catch(Exceptione){}

}

}

privatevoidstopB(){

autoFlag=false;

}

privatevoidstartB(){

autoFlag=true;

}

//显示图片

privatevoidshowPic(){

if(sf==null||sf.length==0)return;

pl.setIcon(newImageIcon(sf[index].getAbsolutePath()));

System.out.println(sf[index].getAbsolutePath());

}

}

㈡ 在JAVA中，实现一个简单的图像浏览器，部署“上一张”、“下一张”两个按钮，点击按钮可前后翻阅图片。

我这有一个！图片你自己找！但必须改成1.jpg,2.jpg........你也可以用卡片布局！比较不错！
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class bmt1 implements ActionListener
{JFrame f;
JPanel p1;
JPanel p2;
JButton b1;
JButton b2;
JButton b3;
JButton b4;
JLabel l1;
ImageIcon icon1;
ImageIcon icon2;
ImageIcon icon3;
ImageIcon icon4;
Boolean ture;
int n=0;
public bmt1()
{f=new JFrame("版面布局");
f.setSize(400,500);
f.setVisible(true);
Container con=f.getContentPane();
con.setLayout(new GridLayout(2,1));
p1=new JPanel();
p2=new JPanel();
con.add(p1);
con.add(p2);
b1=new JButton("第一张");
b2=new JButton("下一张");
b3=new JButton("前一张");
b4=new JButton("最后一张");
p2.add(b1);
p2.add(b2);
p2.add(b3);
p2.add(b4);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
p2.setLayout(new FlowLayout());
l1=new JLabel();
p1.add(l1);
icon1=new ImageIcon("1.jpg");
icon2=new ImageIcon("2.jpg");
icon3=new ImageIcon("3.jpg");
icon4=new ImageIcon("4.jpg");
f.addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}
});
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==b1)
{ n=1;
l1.setIcon(new ImageIcon("1.jpg"));}
if(e.getSource()==b2)
{ n=n+1;
if(n>4){n=1;}
String s=String.valueOf(n);
l1.setIcon(new ImageIcon(s+".jpg"));}
if(e.getSource()==b3)
{ if(n<1){n=4;}
n=n-1;
String s=String.valueOf(n);
l1.setIcon(new ImageIcon(s+".jpg"));}
if(e.getSource()==b4)
{n=4;
l1.setIcon(new ImageIcon("4.jpg"));}
}
public static void main(String args[])
{new bmt1();}
}

㈢ java web网页上显示图片

图片不要中文名字；
图片格式最好为.jpg,不过有的需要.png、.gif格式的图片，有的是需要Flash支持的；
图片的显示也需要通过不同的浏览器测试，当然，如果编程，google和IE肯定是最优先测试的；
路径不要有中文名称，其实在项目中，图片一般会放在一个单独的叫image的文件夹下，这是一种习惯，我们直接写上相对路径，如果可以显示一张图片并且存在的话，那么别的几乎不会出错；
调试过程，是脚本错了，还是页面的标签错误，亦或是你的页面代码不规范，出现乱码等众多情况。
5个应该够了~~ 你找找看是哪里吧~~ 不会继续问哦~

这样可以么？

㈣ 用java编写一个图片浏览器

稍麻烦一点，
下午给出代码

-------------------------------------------------------------
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.filechooser.FileNameExtensionFilter;

public class ImageView extends JFrame {

private boolean isSingle = true;
private JPanel panel = new JPanel();
private CardLayout card = null;
private File[] files = null;
private int fileIndex = 0;
private JPanel single = new JPanel();
private JPanel multiple = new JPanel();

public ImageView() {

setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setSize(600, 450);
setResizable(false);
getContentPane().setLayout(null);

card = new CardLayout(0, 0);
panel.setLayout(card);
panel.setBounds(12, 46, 570, 328);
getContentPane().add(panel);

panel.add(single, "single");
single.setLayout(new BorderLayout(0, 0));

panel.add(multiple, "multiple");
multiple.setLayout(new GridLayout(2, 3, 0, 0));

JButton btnBrowse = new JButton("Browse...");
btnBrowse.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter(
"JPG & GIF Images", "jpg", "gif");
chooser.setFileFilter(filter);
chooser.setMultiSelectionEnabled(true);
int returnVal = chooser.showOpenDialog(getContentPane());
if (returnVal == JFileChooser.APPROVE_OPTION) {
files = chooser.getSelectedFiles();
showPicture();
}
}
});
btnBrowse.setBounds(12, 10, 91, 21);
getContentPane().add(btnBrowse);

JButton btnSingle = new JButton("single");
btnSingle.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
isSingle = true;
card.show(panel, "single");
showPicture();
}
});
btnSingle.setBounds(115, 10, 91, 21);
getContentPane().add(btnSingle);

JButton btnMultiple = new JButton("multiple");
btnMultiple.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
isSingle = false;
card.show(panel, "multiple");
showPicture();
}
});
btnMultiple.setBounds(218, 10, 91, 21);
getContentPane().add(btnMultiple);

JButton btnPrevious = new JButton("previous");
btnPrevious.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (isSingle) {
fileIndex -= 1;
} else {
fileIndex -= 6;
}
showPicture();
}
});
btnPrevious.setBounds(92, 384, 91, 21);
getContentPane().add(btnPrevious);

JButton btnNext = new JButton("next");
btnNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (isSingle) {
fileIndex += 1;
} else {
fileIndex += 6;
}
showPicture();
}
});
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setLocation((screenSize.width - getWidth()) / 2,
(screenSize.height - getHeight()) / 2);
btnNext.setBounds(423, 384, 91, 21);
getContentPane().add(btnNext);
setVisible(true);
}

private void showPicture() {

if (files == null || files.length == 0) {
return;
}
if (fileIndex > files.length || fileIndex < 0) {
fileIndex = 0;
}
PicturePanel canvas = null;
if (isSingle) {
if (single.getComponentCount() > 0) {
canvas = (PicturePanel) single.getComponent(0);
} else {
canvas = new PicturePanel();
single.add(canvas, BorderLayout.CENTER);
}
canvas.setPath(files[fileIndex].getPath());
canvas.repaint();
single.repaint();
} else {

for (int i = 0; i < 6; i++) {
if (files.length == fileIndex + i) {
break;
}

if (multiple.getComponentCount() > i) {
canvas = (PicturePanel) multiple.getComponent(i);
} else {
canvas = new PicturePanel();
multiple.add(canvas);
}
canvas.setPath(files[fileIndex + i].getPath());
canvas.repaint();
multiple.repaint();
}
}

panel.updateUI();
}

public static void main(String[] args) {
new ImageView();
}
}

class PicturePanel extends JPanel {

private Image image;

public PicturePanel() {
}

public void setPath(String filename) {
ImageIcon icon = new ImageIcon(filename);
this.image = icon.getImage();
}

public void paint(Graphics g) {
super.paint(g);
}

protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, 400, 300, this);
}
}

㈤ java实现图片预览功能，可以显示缩列图，具有上下页的功能求技术支持

把图片按照规定的比例压缩，然后保存至FTP，列表读取缩略图，单击显示原图。

/**
*压缩图片方法一(高质量)
*@paramoldFile将要压缩的图片
*@paramwidth压缩宽
*@paramheight压缩高
*@paramsmallIcon压缩图片后,添加的扩展名(在图片后缀名前添加)
*@paramquality压缩质量范围：<i>0.0-1.0</i>高质量:<i>0.75</i>中等质量:<i>0.5</i>低质量:<i>0.25</i>
*@parampercentage是否等比压缩若true宽高比率将将自动调整
*/
publicstaticvoidcompressImage(StringoldFile,intwidth,intheight,StringsmallIcon,
floatquality,booleanpercentage){
try{
Filefile=newFile(oldFile);

//验证文件是否存在
if(!file.exists())
thrownewFileNotFoundException("找不到原图片!");

//获取图片信息
BufferedImageimage=ImageIO.read(file);
intorginalWidth=image.getWidth();
intorginalHeight=image.getHeight();

//验证压缩图片信息
if(width<=0||height<=0||!Pattern.matches("^[1-9]\d*$",String.valueOf(width))
||!Pattern.matches("^[1-9]\d*$",String.valueOf(height)))
thrownewException("图片压缩后的高宽有误!");

//等比压缩
if(percentage){
doublerate1=((double)orginalWidth)/(double)width+0.1;
doublerate2=((double)orginalHeight)/(double)height+0.1;
doublerate=rate1>rate2?rate1:rate2;
width=(int)(((double)orginalWidth)/rate);
height=(int)(((double)orginalHeight)/rate);
}

//压缩后的文件名
StringfilePrex=oldFile.substring(0,oldFile.lastIndexOf('.'));
StringnewImage=filePrex+smallIcon+oldFile.substring(filePrex.length());

//压缩文件存放位置
FilesavedFile=newFile(newImage);

//创建一个新的文件
savedFile.createNewFile();

//创建原图像的缩放版本
Imageimage2=image.getScaledInstance(width,height,Image.SCALE_AREA_AVERAGING);

//创建数据缓冲区图像
BufferedImagebufImage=newBufferedImage(width,height,BufferedImage.TYPE_INT_RGB);

//创建一个Graphics2D
Graphics2Dg2=bufImage.createGraphics();

//重绘图像
g2.drawImage(image2,0,0,width,height,null);
g2.dispose();

//过滤像素矩阵
float[]kernelData={
-0.125f,-0.125f,-0.125f,
-0.125f,2,-0.125f,-0.125f,
-0.125f,-0.125f};
Kernelkernel=newKernel(3,3,kernelData);

//按核数学源图像边缘的像素复制为目标中相应的像素输出像素
ConvolveOpcOp=newConvolveOp(kernel,ConvolveOp.EDGE_NO_OP,null);

//转换像素
bufImage=cOp.filter(bufImage,null);

FileOutputStreamout=newFileOutputStream(savedFile);
JPEGImageEncoderencoder=JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParamparam=encoder.getDefaultJPEGEncodeParam(bufImage);

//设置压缩质量
param.setQuality(quality,true);
encoder.encode(bufImage,param);

out.close();
System.out.println(newImage);
}catch(Exceptione){
e.printStackTrace();
System.out.println("压缩失败!"+e.getMessage());
}
}