JAVA 按任意角度旋转图片，并生成新的旋转后图片（转自：http://www.hackchina.com/r/21265/RotateImage.java__html）

import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import javax.swing.JPanel;

public class RotateImage extends JPanel {

Image image;

BufferedImage bufImage; // 用于显示的缓冲区图像

BufferedImage originalBufImage; // 原始缓冲区图像

Graphics2D bufImageG; // 缓冲区图像的图形环境

public void loadImage(String fileName) {

image = this.getToolkit().getImage(fileName); // 取得图像
MediaTracker mt = new MediaTracker(this); // 实例化媒体加载器
mt.addImage(image, 0); // 增加图像到加载器中
try {
mt.waitForAll(); // 等待图片加载
} catch (Exception ex) {
ex.printStackTrace(); // 输出出错信息
}
originalBufImage = new BufferedImage(image.getWidth(this), image
.getHeight(this), BufferedImage.TYPE_INT_ARGB); // 创建原始缓冲区图像
bufImage = originalBufImage;
bufImageG = bufImage.createGraphics(); // 创建bufImage的图形环境
bufImageG.drawImage(image, 0, 0, this); // 传输源图像数据到缓冲区图像中
}

// 过滤图像
public void ratoteImage(int angle) {

if (bufImage == null)
return; // 如果bufImage为空则直接返回
BufferedImage filteredBufImage = new BufferedImage(
image.getWidth(this), image.getHeight(this),
BufferedImage.TYPE_INT_RGB); // 过滤后的图像

AffineTransform transform = new AffineTransform(); // 仿射变换对象
transform.rotate(java.lang.Math.toRadians(angle),
image.getWidth(this) / 2, image.getHeight(this) / 2); // 旋转图像

AffineTransformOp imageOp = new AffineTransformOp(transform, null);// 创建仿射变换操作对象
imageOp.filter(originalBufImage, filteredBufImage);// 过滤图像，目标图像在filteredBufImage
bufImage = filteredBufImage; // 让用于显示的缓冲区图像指向过滤后的图像

drawImg(bufImage);
}

public void drawImg(BufferedImage image) {
ImageWriter writer = null;
ImageTypeSpecifier type = ImageTypeSpecifier
.createFromRenderedImage(image);
Iterator iter = ImageIO.getImageWriters(type, "jpg");
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
if (writer == null) {
return;
}
IIOImage iioImage = new IIOImage(image, null, null);
ImageWriteParam param = writer.getDefaultWriteParam();

param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);

param.setCompressionQuality((float) ((1) / 10.0));
ImageOutputStream outputStream;
try {
outputStream = ImageIO
.createImageOutputStream(new File("test.jpg"));
writer.setOutput(outputStream);
writer.write(null, iioImage, param);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* @param args
*/
public static void main(String[] args) {
RotateImage rotateImg = new RotateImage();
rotateImg.loadImage("bm.jpg"); // 装载图片
rotateImg.ratoteImage(90);

}

}