Question

如何在java swing的图片浏览器中添加一个能实现图片旋转的按钮

private void initComponents() {

jToolBar1 = new javax.swing.JToolBar();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jButton4 = new javax.swing.JButton();
jButton5 = new javax.swing.JButton();
jButton7 = new javax.swing.JButton();
jButton6 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jLabel1 = new javax.swing.JLabel();

jToolBar1.setRollover(true);

jButton1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Picture/2.JPG"))); // NOI18N
jButton1.setFocusable(false);
jButton1.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jButton1.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jToolBar1.add(jButton1);

jButton2.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Picture/1.jpg"))); // NOI18N
jButton2.setFocusable(false);
jButton2.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jButton2.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});

Answer 1

package gui;
import java.awt.BorderLayout;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Bean extends JFrame implements ActionListener {
 JPanel jPanel;
 JLabel jLabel;
 Image image;
 ImageIcon imageIcon;
 JButton jButton;
 JButton jButton1;
 int w;
 int h;
 int f;
 public Bean() {
  super("图片");
  jButton = new JButton("变大");
  jButton1 = new JButton("反转");
  jButton.addActionListener(this);
  jButton1.addActionListener(this);
  image = Toolkit.getDefaultToolkit().getImage("src/img1.jpg");
  jLabel = new JLabel();
  jPanel = new JPanel();
  ImageIcon imageIcon = new ImageIcon(image);
  jLabel.setIcon(imageIcon);
  jPanel.add(jLabel);
  w = image.getWidth(jLabel);
  h = image.getHeight(jLabel);
  this.add(jPanel, BorderLayout.NORTH);
  this.add(jButton, BorderLayout.SOUTH);
  this.add(jButton1, BorderLayout.EAST);
  this.setVisible(true);
  this.setSize(600, 600);
 }
 public static void main(String[] args) {
  new Bean();
 }
 public void big() {
  w += 20;
  h += 20;
  BufferedImage bffimage = new BufferedImage(w, h,
    BufferedImage.TYPE_3BYTE_BGR);
  // 把图片读到bufferedImage中
  bffimage.getGraphics().drawImage(image, 0, 0, w, h, null);
  // 得到转换后的Image图片
  Image realImage = bffimage;
  // 可以把图片转化为ImageIcon，（Swing中运用）
  ImageIcon img = new ImageIcon(realImage);
  jLabel.setIcon(img);
 }
  
 public void fz() {
  BufferedImage bffimage = new BufferedImage(w, h,
    BufferedImage.TYPE_3BYTE_BGR);
  // 把图片读到bufferedImage中
  bffimage.getGraphics().drawImage(image, 0, 0, w, h, null);
  f+=45;
  // 得到转换后的Image图片
  bffimage=rotateImage(bffimage, f);
  Image realImage = bffimage;
  // 可以把图片转化为ImageIcon，（Swing中运用）
  ImageIcon img = new ImageIcon(realImage);
  jLabel.setIcon(img);
 }
  
 public void actionPerformed(ActionEvent e) {
  if (e.getSource() == jButton) {
   big();
  }
  if (e.getSource() == jButton1) {
   fz();
  }
 }
 /**
  * 旋转图片为指定角度
  * 
  * @param bufferedimage
  *            目标图像
  * @param degree
  *            旋转角度
  * @return
  */
 public static BufferedImage rotateImage(final BufferedImage bufferedimage,
   final int degree) {
  int w = bufferedimage.getWidth();
  int h = bufferedimage.getHeight();
  int type = bufferedimage.getColorModel().getTransparency();
  BufferedImage img;
  Graphics2D graphics2d;
  (graphics2d = (img = new BufferedImage(w, h, type)).createGraphics())
    .setRenderingHint(RenderingHints.KEY_INTERPOLATION,
      RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);
  graphics2d.drawImage(bufferedimage, 0, 0, null);
  graphics2d.dispose();
  return img;
 }
}

追问

谢谢，我试了一下，还是不行，能不能帮我修改一下呢？