请问如何将图片按比例缩小 在jdk的文档中找一下有关jpeg的包,做过,但忘了^_^ 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 转:这是CSDN上一个兄弟的代码。图象缩小一半。 public void paint(Graphics g) {// g.clearRect(0,0,1024,768); bufferedGraphics = (Graphics2D)g; int height=imgSource.getIconHeight(); int width=imgSource.getIconWidth(); Image ia=imgSource.getImage(); Image ib=ia.getScaledInstance( (int)( width*0.5), (int)( height*0.5 ) ,0); ImageIcon ica=new ImageIcon(ib); bufferedGraphics.drawImage(ica.getImage(), 10, 65, ica.getIconWidth(),ica.getIconHeight(), this); } import java.io.*;import java.awt.*;import java.awt.image.*;import com.sun.image.codec.jpeg.*;public class ResizeImage { public static void main(String[] args) { try { //原始图片地址 String imageFile = "H:/works/JAVA/我的方法类包/其他/jpg缩略图/1.jpg"; InputStream imageIn = new FileInputStream(new File(imageFile)); JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(imageIn); BufferedImage im = decoder.decodeAsBufferedImage(); int imh = im.getHeight(null); int imw = im.getWidth(null); int multiple = 3; //缩放比例 BufferedImage imout = new BufferedImage(imw / multiple, imh / multiple, 1); Graphics g = imout.getGraphics(); g.drawImage(im, 0, 0, imw / multiple, imh / multiple, null); //目标图片地址 FileOutputStream output = new FileOutputStream("H:/works/JAVA/我的方法类包/其他/jpg缩略图/2.jpg"); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(output); encoder.encode(imout); imageIn.close(); output.close(); } catch (Exception ex) { ex.printStackTrace(); } }} java基础 接口之间的转换 swing里面怎么删除一条线? 在线请教:一个类多个实例,怎么做? 高分寻求可下的JBuilder9视频教程.分不够可以再加. daemon线程该怎样理解? 学到实例和静态的小小疑问 我被package搞糊涂了,多谢,请帮忙 100分请教,如何在JAVA程序中打印PDF文档? 请问哪里有Jive论坛的教程? JAVA中有类似C中的宏定义的东西吗? 关于HttpURLConnection发送Post请求 java.lang.reflect.InvocationIargetException
public void paint(Graphics g)
{// g.clearRect(0,0,1024,768);
bufferedGraphics = (Graphics2D)g;
int height=imgSource.getIconHeight();
int width=imgSource.getIconWidth();
Image ia=imgSource.getImage();
Image ib=ia.getScaledInstance( (int)( width*0.5), (int)( height*0.5 ) ,0);
ImageIcon ica=new ImageIcon(ib);
bufferedGraphics.drawImage(ica.getImage(), 10, 65, ica.getIconWidth(),ica.getIconHeight(), this);
}
import java.awt.*;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;public class ResizeImage {
public static void main(String[] args) {
try {
//原始图片地址
String imageFile = "H:/works/JAVA/我的方法类包/其他/jpg缩略图/1.jpg";
InputStream imageIn = new FileInputStream(new File(imageFile));
JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(imageIn);
BufferedImage im = decoder.decodeAsBufferedImage();
int imh = im.getHeight(null);
int imw = im.getWidth(null);
int multiple = 3; //缩放比例
BufferedImage imout = new BufferedImage(imw / multiple, imh / multiple, 1);
Graphics g = imout.getGraphics();
g.drawImage(im, 0, 0, imw / multiple, imh / multiple, null);
//目标图片地址
FileOutputStream output = new FileOutputStream("H:/works/JAVA/我的方法类包/其他/jpg缩略图/2.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(output);
encoder.encode(imout); imageIn.close();
output.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}