package com.eatle.utils;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
/**
* @corpor 公司：深讯信科
* @author 作者：谭又中
* @explain 释义：图形工具类
* @version 日期：2012-10-11 下午01:30:44
*/
public class ImageUtil
{
/**
* @Description: 缩略图像
* @throws IOException
* @param sourceImg : 源图像File
* @param targetImg : 生成路径File
* @param targetSize : 缩小目标尺寸
*/
public static void thumbnails(File sourceImg, File targetImg,
float targetSize) throws IOException
{
Image src = ImageIO.read(sourceImg); // 构造Image对象
int old_w = src.getWidth(null); // 得到源图宽
int old_h = src.getHeight(null); // 得到源图高
int new_w = 0;
int new_h = 0;
float tempdouble;
if (old_w > old_h)
{
tempdouble = old_w / targetSize;
}
else
{
tempdouble = old_h / targetSize;
}
new_w = Math.round(old_w / tempdouble); // 计算新图宽
new_h = Math.round(old_h / tempdouble); // 计算新图高
BufferedImage target = new BufferedImage(new_w, new_h,
BufferedImage.TYPE_INT_RGB);
target.getGraphics().drawImage(src, 0, 0, new_w, new_h, null);
FileOutputStream newImage = new FileOutputStream(targetImg);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newImage);
encoder.encode(target);
newImage.close();
}
/**
* @Description: 图片缩放(图片等比例缩放为指定大小，空白部分以白色填充)
* @param srcPath 源图片路径
* @param destPath 缩放后图片路径
*/
public static void zoomImage(String srcPath, String destPath,
int destHeight, int destWidth)
{
try
{
BufferedImage srcBufferedImage = ImageIO.read(new File(srcPath));
int imgWidth = destWidth;
int imgHeight = destHeight;
int srcWidth = srcBufferedImage.getWidth();
int srcHeight = srcBufferedImage.getHeight();
if (srcHeight >= srcWidth)
{
imgWidth = (int) Math
.round(((destHeight * 1.0 / srcHeight) * srcWidth));
}
else
{
imgHeight = (int) Math
.round(((destWidth * 1.0 / srcWidth) * srcHeight));
}
BufferedImage destBufferedImage = new BufferedImage(destWidth,
destHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics2D = destBufferedImage.createGraphics();
graphics2D.setBackground(Color.WHITE);
graphics2D.clearRect(0, 0, destWidth, destHeight);
graphics2D.drawImage(srcBufferedImage.getScaledInstance(imgWidth,
imgHeight, Image.SCALE_SMOOTH), (destWidth / 2)
- (imgWidth / 2), (destHeight / 2) - (imgHeight / 2), null);
graphics2D.dispose();
ImageIO.write(destBufferedImage, "JPEG", new File(destPath));
}
catch (IOException e)
{
e.printStackTrace();
}
}
/**
* 给图片添加水印、可设置水印图片旋转角度
*
* @param iconPath 水印图片路径
* @param srcImgPath 源图片路径
* @param targerPath 目标图片路径
* @param degree 水印图片旋转角度
* @param width 宽度(与左相比)
* @param height 高度(与顶相比)
* @param clarity 透明度(小于1的数)越接近0越透明
*/
public static void waterMarkImageByIcon(String iconPath, String srcImgPath,
String targerPath, Integer degree, Integer width, Integer height,
float clarity)
{
OutputStream os = null;
try
{
Image srcImg = ImageIO.read(new File(srcImgPath));
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),
srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);
// 得到画笔对象
// Graphics g= buffImg.getGraphics();
Graphics2D g = buffImg.createGraphics();
// 设置对线段的锯齿状边缘处理
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg
.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);
if (null != degree)
{
// 设置水印旋转
g.rotate(Math.toRadians(degree),
(double) buffImg.getWidth() / 2, (double) buffImg
.getHeight() / 2);
}
// 水印图象的路径 水印一般为gif或者png的，这样可设置透明度
ImageIcon imgIcon = new ImageIcon(iconPath);
// 得到Image对象。
Image img = imgIcon.getImage();
float alpha = clarity; // 透明度
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));
// 表示水印图片的位置
g.drawImage(img, width, height, null);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
g.dispose();
os = new FileOutputStream(targerPath);
// 生成图片
ImageIO.write(buffImg, "JPG", os);
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
try
{
if (null != os)
os.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
/**
* 给图片添加水印、可设置水印图片旋转角度
*
* @param logoText 水印文字
* @param srcImgPath 源图片路径
* @param targerPath 目标图片路径
* @param degree 水印图片旋转角度
* @param width 宽度(与左相比)
* @param height 高度(与顶相比)
* @param clarity 透明度(小于1的数)越接近0越透明
*/
public static void waterMarkByText(String logoText, String srcImgPath,
String targerPath, Integer degree, Integer width, Integer height,
Float clarity)
{
// 主图片的路径
InputStream is = null;
OutputStream os = null;
try
{
Image srcImg = ImageIO.read(new File(srcImgPath));
BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),
srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);
// 得到画笔对象
// Graphics g= buffImg.getGraphics();
Graphics2D g = buffImg.createGraphics();
// 设置对线段的锯齿状边缘处理
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg
.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);
if (null != degree)
{
// 设置水印旋转
g.rotate(Math.toRadians(degree),
(double) buffImg.getWidth() / 2, (double) buffImg
.getHeight() / 2);
}
// 设置颜色
g.setColor(Color.red);
// 设置 Font
g.setFont(new Font("宋体", Font.BOLD, 30));
float alpha = clarity;
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
alpha));
// 第一参数->设置的内容，后面两个参数->文字在图片上的坐标位置(x,y) .
g.drawString(logoText, width, height);
g.dispose();
os = new FileOutputStream(targerPath);
// 生成图片
ImageIO.write(buffImg, "JPG", os);
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
try
{
if (null != is)
is.close();
}
catch (Exception e)
{
e.printStackTrace();
}
try
{
if (null != os)
os.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
public static void main(String[] args) throws IOException
{
// thumbnails(new File("c:/a.jpg"), new File("c:/b.jpg"), 100);
thumbnails(new File("c:/c.png"), new File("c:/d.png"), 100);
}
}