java change image size example sharing

Specify the path, old file name, new file name, and n to the method below. Change the multiple to complete the change of image size.

Copy the code code as follows:

package com.qq.client.tools;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

public class JpgChange {

// path path, old file name, new file name, n change multiple

public void changeImage(String path, String oldimg, String newimg, int n) {

try {

File file = new File(path + oldimg);

Image img = ImageIO.read(file);

// Construct Image object

int wideth = img.getWidth(null); // Get the source image width

int height = img.getHeight(null); // Get the source image length

BufferedImage tag = new BufferedImage(n * width, n * height,

BufferedImage.TYPE_INT_RGB);

tag.getGraphics().drawImage(img, 0, 0, n * width, n * height, null);

FileOutputStream out = new FileOutputStream(path + newimg);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

encoder.encode(tag); // Near JPEG encoding

out.close();

} catch (IOException e) {

System.out.println("Exception occurred while processing the file");

e.printStackTrace();

}

}

public static void main(String[] args) {

JpgChange jc = new JpgChange();

jc.changeImage("E://", "1.bmp", "2.bmp", 3);

}

}