java中获取照片的代码,java抓取图片内容

怎么用java从文件中读取图片和写入图片到文件里

首先导入各种需要的包：

import java.awt.Image;

import javax.imageio.ImageIO;

import java.io.*;

读取图片的方法如下：

Image[] array = new Image[10];

Image image = ImageIO.read(new File("d:\\source.gif"));//根据你实际情况改文件路径吧

array[0] = image;

图片读出来了。

如果你有一个Image对象，想把它写入文件可以这样做：

BufferedImage image = ImageIO.read(new File("d:\\source.gif"));

//要想保存这个对象的话你要把image声明为BufferedImage 类型

ImageIO.write(image, "png", new File("f:\\test.png"));

相关问答

Q1: 请教如何用Java语言读取jpg图片，并显示

1、获取文件夹的路径 2、得到文件夹中的有图片的名称，可以存到数组或者集合中 3、你再到jsp页面做显示， 4、下面是获取路径和文件名的代码，前台显示的代码自己写 String path = 文件夹路径; String names = ""; try { File f = new File(path)

Q2: 安卓java中读取图片应该怎么写

核心代码

        boolean isSdCardExist = Environment.getExternalStorageState().equals(  

                Environment.MEDIA_MOUNTED);// 判断sdcard是否存在  

        if (isSdCardExist) {  

            String sdpath = Environment.getExternalStorageDirectory()  

                    .getAbsolutePath();// 获取sdcard的根路径  

            textView1.setText("sd卡是存在的。以下是sdcard下的img25.jpg！");  

            String filepath = sdpath + File.separator + "img25.jpg";  

            File file = new File(filepath);  

            ImageView imageView = new ImageView(this);//创建一个imageView对象  

            if (file.exists()) {  

                Bitmap bm = BitmapFactory.decodeFile(filepath);  

                // 将图片显示到ImageView中  

                imageView.setImageBitmap(bm);  

                linearLayout1.addView(imageView);  

            }  

        } else {  

            textView1.setText("sd卡不存在！");  

        }

Q3: java如何读取文件夹中的图片并在界面显示

下面给你提供一个实现，该实现采用了代理模式。这个实现包含两个文件，分别是Client.java和ImageIcoProxy.java，ImageIcoProxy.java负责了图片的延迟加载，你可以修改为不延迟即可。

Client.java的代码为：

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的代码为：

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) {

//已经加载了图片，直接显示

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();

}

}

);

}

}

}

}