| 高级图像处理图像I/O API RC 1.0 |
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| 来源： 作者：John Zukowski 添加日期：2006-6-11 8:57:14 点击次数： |
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String inputFilename = ...;
BufferedImage image = ImageIO.read(inputFilename);
...
String formatName = "jpg"; // desired format
String outputFilename = ...;
File outputFile = new File(outputFilename);
boolean writerExists = ImageIO.write(image,
formatName, outputFile);
为了说明图像I/O库的用法，下面的例子使用JFileChooser提示输入图像文件名。选中文件后再选择目标输出格式，然后按下“Save（保存）”按钮。保存完成后，将重新读取图像并在一个新窗口内显示。
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import javax.imageio.*;
public class Converting extends JFrame {
JLabel promptLabel;
JTextField prompt;
JButton promptButton;
JFileChooser fileChooser;
JComboBox comboBox;?
JButton saveButton;?
public Converting() {
super("Image Conversion");
setDefaultCloseOperation(EXIT_ON_CLOSE);
Container contentPane = getContentPane();
JPanel inputPanel = new JPanel();
promptLabel = new JLabel("Filename:");
inputPanel.add(promptLabel);
prompt = new JTextField(20);
inputPanel.add(prompt);
promptButton = new JButton("Browse");
inputPanel.add(promptButton);
contentPane.add(inputPanel, BorderLayout.NORTH);
fileChooser = new JFileChooser();
promptButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
int returnValue =
fileChooser.showOpenDialog(null); |
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