处理图片的缩放、旋转、裁剪和翻转这四种效果代码,Java代码库,德仔网

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【Java】处理图片的缩放、旋转、裁剪和翻转这四种效果
作者:evilgod528 / 发布于2015/2/15/ 564
基于jdk中的api，无其它依赖，实现的四种图片处理

	package service.course.tools;
	
	import javax.imageio.ImageIO;
	import java.awt.*;
	import java.awt.geom.AffineTransform;
	import java.awt.geom.Point2D;
	import java.awt.image.BufferedImage;
	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	
	/**
	* Created by evilgod528 on 15/2/11.
	*/
	public class PsImage {
	 private File originImage;
	 //正在处理的内存中的图片
	 private BufferedImage bufferedImage;
	 private BufferedImage dealedImage;
	
	 public PsImage(File image) throws IOException {
	 if(image.exists()) {
	 this.originImage = image;
	 this.bufferedImage = ImageIO.read(image);
	 this.dealedImage = this.bufferedImage;
	 }else{
	 throw new FileNotFoundException("图片文件文件不存在");
	 }
	 }
	 private String getFileType(String imageName){
	 String imageType = "jpg";
	 int index = imageName.lastIndexOf(".");
	 if(index!=-1 && index!=imageName.length()){
	 imageType = imageName.substring(index+1);
	 }
	 return imageType;
	 }
	 //生成处理后的图片，若参数为null，则修改原始图片
	 public boolean createPic(File disposedImage){
	 boolean flag = false;
	 if(disposedImage==null){
	 disposedImage = originImage;
	 }
	 String imageType = getFileType(disposedImage.getName());
	 try {
	 flag = ImageIO.write(dealedImage,imageType,disposedImage);
	 } catch (IOException e) {
	 e.printStackTrace();
	 }
	 return flag;
	 }
	 //图片缩放处理
	 public PsImage scale(int width,int height){
	 BufferedImage newImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	 Graphics2D g = newImg.createGraphics();
	 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
	 g.drawImage(this.dealedImage, 0, 0, width, height, null);
	 this.dealedImage = newImg;
	 g.dispose();
	
	 return this;
	 }
	 //剪切处理
	 public PsImage clip(int srcX,int srcY,int width,int height){
	 BufferedImage newImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	 Graphics2D g = newImg.createGraphics();
	 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
	 g.setColor(Color.WHITE);
	 g.fillRect(0, 0, width, height);
	 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
	 g.drawImage(this.dealedImage, 0, 0, width, height, srcX, srcY, srcX + width, srcY + height, null);
	 this.dealedImage = newImg;
	 g.dispose();
	
	 return this;
	 }
	 //angle：角度，图片旋转角度
	 public PsImage rotate(int angle){
	 int width = this.dealedImage.getWidth();
	 int height = this.dealedImage.getHeight();
	 int new_w = 0, new_h = 0;
	 int new_radian = angle;
	 if (angle <= 90) {
	 new_w = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
	 new_h = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
	 } else if (angle <= 180) {
	 new_radian = angle - 90;
	 new_w = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
	 new_h = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
	 } else if (angle <= 270) {
	 new_radian = angle - 180;
	 new_w = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
	 new_h = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
	 } else {
	 new_radian = angle - 270;
	 new_w = (int) (height * Math.cos(Math.toRadians(new_radian)) + width * Math.sin(Math.toRadians(new_radian)));
	 new_h = (int) (width * Math.cos(Math.toRadians(new_radian)) + height * Math.sin(Math.toRadians(new_radian)));
	 }
	 BufferedImage toStore = new BufferedImage(new_w, new_h, BufferedImage.TYPE_INT_RGB);
	 Graphics2D g = toStore.createGraphics();
	 AffineTransform affineTransform = new AffineTransform();
	 affineTransform.rotate(Math.toRadians(angle), width / 2, height / 2);
	 if (angle != 180) {
	 AffineTransform translationTransform = this.findTranslation(affineTransform, this.dealedImage, angle);
	 affineTransform.preConcatenate(translationTransform);
	 }
	 g.setColor(Color.WHITE);
	 g.fillRect(0, 0, new_w, new_h);
	 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
	 g.drawRenderedImage(this.dealedImage, affineTransform);
	 g.dispose();
	 this.dealedImage = toStore;
	
	 return this;
	 }
	 //isVertical:true,垂直翻转 ; false,水平翻转
	 public PsImage reverse(boolean isVertical){
	 int width = this.dealedImage.getWidth();
	 int height = this.dealedImage.getHeight();
	 double[] matrix;
	 if(isVertical){
	 matrix = new double[]{1, 0, 0, -1, 0,height};
	 }else {
	 matrix = new double[]{-1, 0, 0, 1,width,0};
	 }
	 AffineTransform affineTransform = new AffineTransform(matrix);
	 BufferedImage newImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
	 Graphics2D g = newImg.createGraphics();
	 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
	 g.drawRenderedImage(this.dealedImage, affineTransform);
	 g.dispose();
	 this.dealedImage = newImg;
	
	 return this;
	 }
	 private AffineTransform findTranslation(AffineTransform at, BufferedImage bi, int angle) {//45
	 Point2D p2din, p2dout;
	 double ytrans = 0.0, xtrans = 0.0;
	 if (angle <= 90) {
	 p2din = new Point2D.Double(0.0, 0.0);
	 p2dout = at.transform(p2din, null);
	 ytrans = p2dout.getY();
	
	 p2din = new Point2D.Double(0, bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 xtrans = p2dout.getX();
	 }
	 /*else if(angle<=135){
	 p2din = new Point2D.Double(0.0, bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 ytrans = p2dout.getY();
	
	 p2din = new Point2D.Double(bi.getWidth(),bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 xtrans = p2dout.getX();
	
	 }*/
	 else if (angle <= 180) {
	 p2din = new Point2D.Double(0.0, bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 ytrans = p2dout.getY();
	
	 p2din = new Point2D.Double(bi.getWidth(), bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 xtrans = p2dout.getX();
	
	 }
	 /*else if(angle<=225){
	 p2din = new Point2D.Double(bi.getWidth(), bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 ytrans = p2dout.getY();
	
	 p2din = new Point2D.Double(bi.getWidth(),0.0);
	 p2dout = at.transform(p2din, null);
	 xtrans = p2dout.getX();
	
	 }*/
	 else if (angle <= 270) {
	 p2din = new Point2D.Double(bi.getWidth(), bi.getHeight());
	 p2dout = at.transform(p2din, null);
	 ytrans = p2dout.getY();
	
	 p2din = new Point2D.Double(bi.getWidth(), 0.0);
	 p2dout = at.transform(p2din, null);
	 xtrans = p2dout.getX();
	
	 } else {
	 p2din = new Point2D.Double(bi.getWidth(), 0.0);
	 p2dout = at.transform(p2din, null);
	 ytrans = p2dout.getY();
	
	
	 p2din = new Point2D.Double(0.0, 0.0);
	 p2dout = at.transform(p2din, null);
	 xtrans = p2dout.getX();
	
	 }
	 AffineTransform tat = new AffineTransform();
	 tat.translate(-xtrans, -ytrans);
	 return tat;
	 }
	
	}
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