版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/BuFanQi_Info/article/details/81033605
package com.lh.wx.utils;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class ImageUtil {
/**
* 对图片进行放大
* @param originalImage 原始图片
* @param times 放大倍数
* @return
*/
public static BufferedImage zoomInImage(BufferedImage originalImage, Integer times){
int width = originalImage.getWidth()*times;
int height = originalImage.getHeight()*times;
BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());
Graphics g = newImage.getGraphics();
g.drawImage(originalImage, 0,0,width,height,null);
g.dispose();
return newImage;
}
/**
* 对图片进行放大
* @param srcPath 原始图片路径(绝对路径)
* @param newPath 放大后图片路径（绝对路径）
* @param times 放大倍数
* @return 是否放大成功
*/
public static boolean zoomInImage(String srcPath,String newPath,Integer times){
BufferedImage bufferedImage = null;
try {
File of = new File(srcPath);
if(of.canRead()){
bufferedImage = ImageIO.read(of);
}
} catch (IOException e) {
//TODO: 打印日志
return false;
}
if(bufferedImage != null){
bufferedImage = zoomInImage(bufferedImage,times);
try {
//TODO: 这个保存路径需要配置下子好一点
ImageIO.write(bufferedImage, "JPG", new File(newPath)); //保存修改后的图像,全部保存为JPG格式
} catch (IOException e) {
// TODO 打印错误信息
return false;
}
}
return true;
}
/**
* 对图片进行缩小
* @param originalImage 原始图片
* @param times 缩小倍数
*
* @param reducewidth 缩放后减小宽度 (当times=-1时此参数及是图片宽度)
* @param reduceheight缩放后减小高度(同上)
* @return 缩小后的Image
*/
public static BufferedImage zoomOutImage(BufferedImage originalImage, Integer times,int reducewidth,int reduceheight){
int width = originalImage.getWidth()/times-reducewidth;
if(width < 0){
width=originalImage.getWidth();
}
int height = originalImage.getHeight()/times-reduceheight;
if(height < 0){
height=originalImage.getHeight();
}
if(times == -1){
width= reducewidth;
height =reduceheight;
}
BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());
Graphics g = newImage.getGraphics();
g.drawImage(originalImage, 0,0,width,height,null);
g.dispose();
return newImage;
}
/**
* 对图片进行缩小
* @param srcPath 源图片路径（绝对路径）
* @param newPath 新图片路径（绝对路径）
* @param times 缩小倍数
* @return 保存是否成功
*/
public static boolean zoomOutImage(String srcPath,String newPath,Integer times){
BufferedImage bufferedImage = null;
try {
File of = new File(srcPath);
if(of.canRead()){
bufferedImage = ImageIO.read(of);
}
} catch (IOException e) {
//TODO: 打印日志
return false;
}
if(bufferedImage != null){
bufferedImage = zoomOutImage(bufferedImage,times,0,0);
try {
//TODO: 这个保存路径需要配置下子好一点
ImageIO.write(bufferedImage, "JPG", new File(newPath)); //保存修改后的图像,全部保存为JPG格式
} catch (IOException e) {
// TODO 打印错误信息
return false;
}
}
return true;
}
}