java swing awt绘制一个图片查看器 图片显示 图片控件
感谢
java图片查看器
的代码
java似乎没有一个名字叫图片控件的 控件，使用swing 的Label显示图片
他的代码如下：
package swing.draw;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import javax.swing.GroupLayout;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.LayoutStyle;
import javax.swing.border.LineBorder;
import javax.swing.SwingUtilities;
public class PictureShow extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JButton jButton1;
private JButton jButton4;
private JLabel jLabel2; //显示图片的区域
private JButton jButton3;
private JButton jButton2;
private JTextField jTextField1;
private JLabel jLabel1;
private int count=0;
private int num=0;
private ArrayList<String> list=new ArrayList<String>();
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
PictureShow inst = new PictureShow();
inst.setLocationRelativeTo(null);
inst.setVisible(true);
}
});
}
public PictureShow() {
super();
initGUI();
}
private void initGUI() {
try {
GroupLayout thisLayout = new GroupLayout((JComponent)getContentPane());
getContentPane().setLayout(thisLayout);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("图片显示V1.0---王荣喜");
{
jLabel1 = new JLabel();
jLabel1.setText("\u6253\u5f00");
}
{
jTextField1 = new JTextField();
}
{
//浏览....
jButton1 = new JButton();
jButton1.setText("\u6d4f\u89c8...");
jButton1.addActionListener(this);
}
{
//放入相册
jButton4 = new JButton();
jButton4.setText("\u653e\u5165\u96be\u9898\u518c");
jButton4.addActionListener(this);
}
{
//显示图片的区域
jLabel2 = new JLabel();
jLabel2.setBorder(new LineBorder(new java.awt.Color(0,0,0), 1, false));
jLabel2.setSize(600, 450);
}
{
jButton2 = new JButton();
jButton2.setText("\u4e0a\u4e00\u5f20");
jButton2.addActionListener(this);
}
{
jButton3 = new JButton();
jButton3.setText("\u4e0b\u4e00\u5f20");
jButton3.addActionListener(this);
}
thisLayout.setVerticalGroup(thisLayout.createSequentialGroup()
.addContainerGap()
.addGroup(thisLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1, GroupLayout.Alignment.BASELINE, GroupLayout.PREFERRED_SIZE, 20, GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField1, GroupLayout.Alignment.BASELINE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
.addComponent(jButton1, GroupLayout.Alignment.BASELINE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
.addComponent(jButton4, GroupLayout.Alignment.BASELINE, GroupLayout.PREFERRED_SIZE, 22, GroupLayout.PREFERRED_SIZE))
.addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(thisLayout.createParallelGroup()
.addComponent(jLabel2, GroupLayout.Alignment.LEADING, 0, 496, Short.MAX_VALUE)
.addGroup(thisLayout.createSequentialGroup()
.addGap(210)
.addGroup(thisLayout.createParallelGroup()
.addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
.addComponent(jButton2, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
.addGap(0, 11, Short.MAX_VALUE))
.addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
.addGap(11)
.addComponent(jButton3, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE, GroupLayout.PREFERRED_SIZE)
.addGap(0, 0, Short.MAX_VALUE)))
.addGap(253)))
.addContainerGap(24, 24));
thisLayout.setHorizontalGroup(thisLayout.createSequentialGroup()
.addGroup(thisLayout.createParallelGroup()
.addComponent(jButton2, GroupLayout.Alignment.LEADING, GroupLayout.PREFERRED_SIZE, 79, GroupLayout.PREFERRED_SIZE)
.addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
.addGap(24)
.addComponent(jLabel1, GroupLayout.PREFERRED_SIZE, 54, GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
.addGroup(thisLayout.createParallelGroup()
.addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
.addComponent(jLabel2, GroupLayout.PREFERRED_SIZE, 608, GroupLayout.PREFERRED_SIZE)
.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton3, GroupLayout.PREFERRED_SIZE, 82, GroupLayout.PREFERRED_SIZE))
.addGroup(GroupLayout.Alignment.LEADING, thisLayout.createSequentialGroup()
.addComponent(jTextField1, GroupLayout.PREFERRED_SIZE, 428, GroupLayout.PREFERRED_SIZE)
.addGap(28)
.addComponent(jButton1, GroupLayout.PREFERRED_SIZE, 98, GroupLayout.PREFERRED_SIZE)
.addGap(19)
.addComponent(jButton4, GroupLayout.PREFERRED_SIZE, 109, GroupLayout.PREFERRED_SIZE)
.addGap(0, 20, Short.MAX_VALUE))));
pack();
this.setSize(800, 600);
} catch (Exception e) {
//add your error handling code here
e.printStackTrace();
}
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
//浏览
if(e.getSource()==jButton1){
JFileChooser fc=new JFileChooser();
int returnval = fc.showOpenDialog(this);
if(returnval == JFileChooser.APPROVE_OPTION){
//获取这个被选中的文件
File f = fc.getSelectedFile ();
//文件名
String fileName = f.getName ();
//文件绝对路径
String filePath=fc.getSelectedFile().getAbsolutePath();
//把路径显示在textfield中
jTextField1.setText(filePath);
//
this.setTitle (fileName+"--图片查看器V1.0");
//获取这个图片本身
ImageIcon image=new ImageIcon(filePath);
//获取图片的宽和高
int width=image.getIconWidth();
int height=image.getIconHeight();
if(width>height){
//宽图 设置成600*450
Image scaledImage=image.getImage().getScaledInstance(600,450,Image.SCALE_DEFAULT);
ImageIcon scaledIcon=new ImageIcon(scaledImage);
jLabel2.setIcon(scaledIcon);
jLabel2.setHorizontalAlignment(0);
jLabel2.setVerticalAlignment(0);
}else{
//高图 设置成300*450
Image scaledImage=image.getImage().getScaledInstance(300,450,Image.SCALE_DEFAULT);
ImageIcon scaledIcon=new ImageIcon(scaledImage);
jLabel2.setIcon(scaledIcon);
jLabel2.setHorizontalAlignment(0);
jLabel2.setVerticalAlignment(0);
}
//下面的代码用于遍历同一个文件夹下的其他图片
File []fileList=f.getParentFile().listFiles();
for(int i=0;i<fileList.length;i++){
if(fileList[i].isFile()){
String []part=fileList[i].getName().split("\\.");
if(part[1].equals("jpg")||part[1].equals("JPG")||part[1].equals("GIF")||part[1].equals("gif")||part[1].equals("png")||part[1].equals("PNG")||part[1].equals("bmp")||part[1].equals("BMP")){
list.add(fileList[i].getAbsolutePath());
num++;
if(fileList[i].getAbsolutePath().equals(filePath)){
count=num;
}
}
}
}
}
//
}else if(e.getSource()==jButton2){
if(count>=1){
String path=list.get(count-1);
//System.out.println(path);
ImageIcon image=new ImageIcon(path);
int width=image.getIconWidth();
int height=image.getIconHeight();
if(width>height){
Image scaledImage=image.getImage().getScaledInstance(600,450,Image.SCALE_DEFAULT);
ImageIcon scaledIcon=new ImageIcon(scaledImage);
jLabel2.setIcon(scaledIcon);
jLabel2.setHorizontalAlignment(0);
jLabel2.setVerticalAlignment(0);
}else{
Image scaledImage=image.getImage().getScaledInstance(300,450,Image.SCALE_DEFAULT);
ImageIcon scaledIcon=new ImageIcon(scaledImage);
jLabel2.setIcon(scaledIcon);
jLabel2.setHorizontalAlignment(0);
jLabel2.setVerticalAlignment(0);
}
jTextField1.setText(path);
File file=new File(path);
this.setTitle(file.getName()+"--图片查看器V1.0---王荣喜");
count--;
//System.out.println(path+"\t"+count);
}else{
JOptionPane.showMessageDialog(null, "已经是第一张图片！");
}
}else if(e.getSource()==jButton3){
if(count<list.size()-1){
//System.out.println(list.get(0));
String path=list.get(count+1);
ImageIcon image=new ImageIcon(path);
int width=image.getIconWidth();
int height=image.getIconHeight();
if(width>height){
Image scaledImage=image.getImage().getScaledInstance(600,450,Image.SCALE_DEFAULT);
ImageIcon scaledIcon=new ImageIcon(scaledImage);
jLabel2.setIcon(scaledIcon);
jLabel2.setHorizontalAlignment(0);
jLabel2.setVerticalAlignment(0);
}else{
Image scaledImage=image.getImage().getScaledInstance(300,450,Image.SCALE_DEFAULT);
ImageIcon scaledIcon=new ImageIcon(scaledImage);
jLabel2.setIcon(scaledIcon);
jLabel2.setHorizontalAlignment(0);
jLabel2.setVerticalAlignment(0);
}
jTextField1.setText(path);
File file=new File(path);
this.setTitle(file.getName()+"--图片查看器V1.0---王荣喜");
count++;
//System.out.println(path+"\t"+count);
}else{
JOptionPane.showMessageDialog(null, "已经是最后一张图片！");
}
}else if(e.getSource()==jButton4){
if(jTextField1.getText().equals("")){
JOptionPane.showMessageDialog(null, "请先打开一张图片！");
}else{
try{
FileInputStream fin=new FileInputStream(jTextField1.getText());
BufferedInputStream bin=new BufferedInputStream(fin);
String filename=(new File(jTextField1.getText())).getName();
FileOutputStream fou=new FileOutputStream("d://diffcult//"+filename);
BufferedOutputStream bou=new BufferedOutputStream(fou);
byte []buff=new byte[1024*10];
int len;
while((len=bin.read(buff))!=-1){
bou.write(buff, 0, len);
}
bou.flush();
bou.close();
bin.close();
fou.close();
fin.close();
(new File(jTextField1.getText())).delete();
list.remove(count);
JOptionPane.showMessageDialog(null, "该题目已经放进难题册！");
}catch(IOException e1){
JOptionPane.showMessageDialog(null, "文件流读写错误！");
}
}
}
}
}