java剪裁图片的一些收获

最近要实现把用户上传的图片转换为500宽，245*200,102*85,大小的格式，要保证图片质量，又要高效率。下面是我试过的一下方法。
方法一：效率高，质量低

import java.awt.Graphics;

import java.awt.image.BufferedImage;
import java.io.File;

import java.io.IOException;


import javax.imageio.ImageIO;


public class ImageUtils{
	

	/**
	 * 对图片进行缩小
	 * @param originalImage 原始图片
	 * @param times 缩小倍数
	 * @return 缩小后的图像
	 */
	public static BufferedImage  zoomImage(BufferedImage  originalImage,double  times){
		int width = (int) ((int)originalImage.getWidth()*times);
		int height = (int) ((int)originalImage.getHeight()*times);
		System.out.println("width:"+width+" height:"+height);
		BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());
		Graphics g = newImage.getGraphics();
		g.drawImage(originalImage, 0,0,width,height,null);
		g.dispose();
		return newImage;
	}
	

	/**
	 * 截取图片
	 * @param path 图片路径
	 * @param x 开始位置x坐标
	 * @param y 开始位置y坐标
	 * @param width 宽度
	 * @param height 高度
	 * @return 图片保存的url
	 */

	public static BufferedImage cutting(BufferedImage bufferedImage,int x,int y,int width,int height){
			return bufferedImage.getSubimage(x, y, width, height);
	}
	/**
	 * 处理图片 获得102*85，245*200，宽500等比例缩放
	 * @param path 图片路径
	 * @return 处理成功返回true，处理失败返回false
	 */
	public static boolean afterPostPhoto(String path){
		BufferedImage bufferedImage = null;
		String suffix=path.substring(path.lastIndexOf(".")+1, path.length());
		
		try {
			bufferedImage =  ImageIO.read(new File(path));
			double x=bufferedImage.getWidth();
			double y=bufferedImage.getHeight();
			System.out.println("x="+x+",y="+y);
			if(x>500){
				double times=500/x;
				
			
				ImageIO.write(zoomImage(bufferedImage, times), suffix, new File(path.substring(0, path.lastIndexOf("."))+"L"+path.substring(path.lastIndexOf("."), path.length())));
			}
			if(x>245){
				
				double times;
				if(x/y>1.225){
					 times=200/y;
					
				}else{
					 times=245/x;
				}
				
				ImageIO.write(cutting(zoomImage(bufferedImage, times), 0, 0, 245, 200), suffix, new File(path.substring(0, path.lastIndexOf("."))+"M"+path.substring(path.lastIndexOf("."), path.length())));
			}
			
			if(x>102){
				double times;
				if(x/y>1.2){
					 times=85/y;
					
				}else{
					 times=102/x;
				}
				
				ImageIO.write(cutting(zoomImage(bufferedImage, times), 0, 0, 102, 85), suffix, new File(path.substring(0, path.lastIndexOf("."))+"S"+path.substring(path.lastIndexOf("."), path.length())));
			
			}
			
		} catch (IOException e) {
			
			e.printStackTrace();
			return false;
		}
			return true;
	}
	public static boolean afterSetIcon(String path){
		BufferedImage bufferedImage = null;
		double times;
		String suffix=path.substring(path.lastIndexOf(".")+1, path.length());
		try {
			bufferedImage =  ImageIO.read(new File(path));
		} catch (IOException e) {
			
			e.printStackTrace();
			return false;
		}
		double x=bufferedImage.getWidth();
		double y=bufferedImage.getHeight();
		if(x/y>1){
			 times=x/y;
		}
		else if(y/x>1){
			times=y/x;
		}
		return true;
	}
	/**
	 * 检查图片分辨率是否大于300*200
	 * 大于300*200返回true，执行上传，否则返回
	 * false并删除图片
	 * @param path 图片路径
	 * @return 大于300*200返回true,否则返回false
	 */
	public static boolean checkUpload(String path){
		BufferedImage bufferedImage = null;
		
		try {
			bufferedImage =  ImageIO.read(new File(path));
			double x=bufferedImage.getWidth();
			double y=bufferedImage.getHeight();
			if(x<300||y<200){
				return false;
			}
		} catch (IOException e) {
			
			e.printStackTrace();
			return false;
		}
		return true;
		
	}
	public static void main(String[] args) {
		
		afterPostPhoto("F:/照片/春天的足迹/1.jpg");
	//	System.out.println(x/y);
	}

方法二：质量高，效率低

package image.too;

import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import javax.swing.*;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.image.Kernel;
import java.awt.image.ConvolveOp;

public class ImagePro {
	/**
	 * 图片缩放
	 * 
	 * @param originalFile
	 *            源文件
	 * @param resizedFile
	 *            目标文件
	 * @param newWidth
	 *            新图片的宽度
	 * @param quality
	 *            成像质量
	 * @throws IOException
	 */
	public static void resize(File originalFile, File resizedFile,
			int newWidth, float quality) throws IOException {
		BufferedImage bufferedImage = resize(originalFile, newWidth, quality);

		savaImage(bufferedImage, resizedFile);

	}

	public static void savaImage(BufferedImage bufferedImage, File resizedFile)
			throws ImageFormatException, IOException {
		FileOutputStream out = new FileOutputStream(resizedFile);

		// Encodes image as a JPEG data stream
		JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);

		JPEGEncodeParam param = encoder
				.getDefaultJPEGEncodeParam(bufferedImage);

		param.setQuality(1.0f, true);

		encoder.setJPEGEncodeParam(param);
		encoder.encode(bufferedImage);
	}

	/** 截取图片 */
	public static void cutting(File file, File newFile, int x, int y,
			int width, int height) {
		try {
			String endName = file.getName();
			endName = endName.substring(endName.lastIndexOf(".") + 1);
			Iterator<ImageReader> readers = ImageIO
					.getImageReadersByFormatName(endName);
			ImageReader reader = (ImageReader) readers.next();
			InputStream is = new FileInputStream(file);
			ImageInputStream iis = ImageIO.createImageInputStream(is);
			reader.setInput(iis, true);
			ImageReadParam param = reader.getDefaultReadParam();
			Rectangle rect = new Rectangle(x, y, width, height);
			param.setSourceRegion(rect);
			BufferedImage bi = reader.read(0, param);
			ImageOutputStream out = ImageIO
					.createImageOutputStream(new FileOutputStream(newFile));
			ImageIO.write(bi, endName, out);

		} catch (Exception e) {
			e.printStackTrace();
		}

	}

	public static BufferedImage resize(File originalFile, int newWidth,
			float quality) throws IOException {

		if (quality > 1) {
			throw new IllegalArgumentException(
					"Quality has to be between 0 and 1");
		}

		ImageIcon ii = new ImageIcon(originalFile.getCanonicalPath());
		Image i = ii.getImage();
		Image resizedImage = null;

		int iWidth = i.getWidth(null);
		int iHeight = i.getHeight(null);

		if (iWidth > iHeight) {
			resizedImage = i.getScaledInstance(newWidth, (newWidth * iHeight)
					/ iWidth, Image.SCALE_AREA_AVERAGING);
		} else {
			resizedImage = i.getScaledInstance((newWidth * iWidth) / iHeight,
					newWidth, Image.SCALE_AREA_AVERAGING);
		}

		// This code ensures that all the pixels in the image are loaded.
		Image temp = new ImageIcon(resizedImage).getImage();

		// Create the buffered image.
		BufferedImage bufferedImage = new BufferedImage(temp.getWidth(null),

		temp.getHeight(null), BufferedImage.TYPE_INT_RGB);

		// Copy image to buffered image.
		Graphics g = bufferedImage.createGraphics();

		// Clear background and paint the image.
		g.setColor(Color.white);
		g.fillRect(0, 0, temp.getWidth(null), temp.getHeight(null));
		g.drawImage(temp, 0, 0, null);
		g.dispose();

		// Soften.
		float softenFactor = 0.05f;
		float[] softenArray = { 0, softenFactor, 0, softenFactor,
				1 - (softenFactor * 4), softenFactor, 0, softenFactor, 0 };
		Kernel kernel = new Kernel(3, 3, softenArray);
		ConvolveOp cOp = new ConvolveOp(kernel,

		ConvolveOp.EDGE_NO_OP, null);
		bufferedImage = cOp.filter(bufferedImage, null);

		return bufferedImage;
	}

	/**
	 * 处理图片 获得102*85，245*200，宽500等比例缩放
	 * 
	 * @param path
	 *            图片路径
	 * @return 处理成功返回true，处理失败返回false
	 */
	public static boolean process(String path) {
		File file = new File(path);
		BufferedImage bufferedImage = null;
	

		try {
			bufferedImage = ImageIO.read(new File(path));
			double x = bufferedImage.getWidth();
			double y = bufferedImage.getHeight();
			System.out.println("x=" + x + ",y=" + y);
			if (x > 500) {
				resize(file,
						new File(path.substring(0, path.lastIndexOf("."))
								+ "L"
								+ path.substring(path.lastIndexOf("."),
										path.length())), 500, 1.0f);
			} else {

				copyImage(
						file,
						new File(path.substring(0, path.lastIndexOf("."))
								+ "L"
								+ path.substring(path.lastIndexOf("."),
										path.length())));
			}

			if (x > 245) {

				int iWidth;
				if (x / y > 1.225) {
					iWidth = (int) (x * 200 / y);

				} else {
					iWidth = 245;
				}
				resize(file,
						new File(path.substring(0, path.lastIndexOf("."))
								+ "M"
								+ path.substring(path.lastIndexOf("."),
										path.length())), iWidth, 1.0f);

			} else {

				copyImage(
						file,
						new File(path.substring(0, path.lastIndexOf("."))
								+ "M"
								+ path.substring(path.lastIndexOf("."),
										path.length())));
			}

			if (x > 102) {
				int iWidth;
				if (x / y > 1.2) {
					iWidth = (int) (x * 85 / y);

				} else {
					iWidth = 102;
				}
				resize(file,
						new File(path.substring(0, path.lastIndexOf("."))
								+ "S"
								+ path.substring(path.lastIndexOf("."),
										path.length())), iWidth, 1.0f);

			} else {

				copyImage(
						file,
						new File(path.substring(0, path.lastIndexOf("."))
								+ "S"
								+ path.substring(path.lastIndexOf("."),
										path.length())));
			}

		} catch (IOException e) {

			e.printStackTrace();
		}
		return true;
	}

	/**
	 * 复制文件
	 * 
	 * @param source
	 *            源文件
	 * @param destination
	 *            目标文件
	 */
	public static void copyFile(File source, File destination) {

		FileInputStream sourceFile = null;
		FileOutputStream destinationFile = null;
		try {

			destination.createNewFile();

			sourceFile = new FileInputStream(source);
			destinationFile = new FileOutputStream(destination);
			BufferedReader br = new BufferedReader(new FileReader(source));
			// ByteArrayInputStream bin=new ByteArrayInputStream(br.r)
			BufferedWriter bw = new BufferedWriter(new FileWriter(destination));

			String str = null;
			while ((str = br.readLine()) != null) {
				bw.write(str);
				bw.newLine();
				bw.flush();
			}

		} catch (FileNotFoundException f) {
		} catch (IOException e) {
		} finally {

			try {
				sourceFile.close();
			} catch (Exception e) {
			}
			try {
				destinationFile.close();
			} catch (Exception e) {
			}
		}
	}

	public static void copyImage(File source, File destination) {

		FileInputStream fi = null;
		try {
			fi = new FileInputStream(source);
		} catch (FileNotFoundException e) {

			e.printStackTrace();
		}
		BufferedInputStream in = new BufferedInputStream(fi);
		FileOutputStream fo = null;
		try {
			fo = new FileOutputStream(destination);
		} catch (FileNotFoundException e) {

			e.printStackTrace();
		}
		BufferedOutputStream out = new BufferedOutputStream(fo);

		byte[] buf = new byte[1024];
		int len;
		try {
			len = in.read(buf);
			while (len != -1) {
				out.write(buf, 0, len);
				len = in.read(buf);
			}
			out.close();
			fo.close();
			in.close();
			fi.close();
		} catch (IOException e) {

			e.printStackTrace();
		}

	}

	public static void main(String[] args) throws IOException {
		// File originalImage = new File("C:\\11.jpg");
		// resize(originalImage, new File("c:\\11-0.jpg"),150, 0.7f);
		// resize(originalImage, new File("c:\\11-1.jpg"),150, 1f);
		// File originalImage = new File("E:/1.jpg");
		// resize(originalImage, new File("E:/1203-0.png"), 500, 0.7f);
		// resize(originalImage, new File("E:/1203-1.png"), 500, 1f);
		long time = System.currentTimeMillis();
		process("E:/1.jpg");
		System.out.println(System.currentTimeMillis() - time);
		// copyImage(new File("E:/Post.java"), new File("E:/Post2.java"));
		// copyImage("E:/1.jpg","E:/1_0.jpg");
	}
}

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