图片添加水印和压缩

[Java]代码

package net.leebao.core.util;

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;

/**

* 图片水印

*/

public class ImageUtil {

/**

* @param args

*/

public static void main(String[] args) {

String srcImgPath = "E:/zhzq/1.png";

String iconPath = "E:/zhzq/2.jpg";

String targerPath = "E:/zhzq/4.png";

// 给图片添加水印

//ImageUtil.waterMarkImageByIcon("java水印图片", iconPath, srcImgPath, targerPath, 0, 0, 0, 0.5f);

ImageUtil.waterMarkByText("java水印图片", srcImgPath, targerPath, 0, 0, 0, 0.5f);

// 给图片添加水印,水印旋转-45

//

}

/**

* 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 logoText, 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));

System.out.println("width:" + srcImg.getWidth(null));

System.out.println("height:" + srcImg.getHeight(null));

BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null), srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);

// 得到画笔对象

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.drawImage(img, srcImg.getWidth(null) - img.getWidth(null), srcImg.getHeight(null) - img.getHeight(null), null);

//g.drawString(logoText, srcImg.getWidth(null) - img.getWidth(null), srcImg.getHeight(null) - img.getHeight(null));

g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));

g.dispose();

os = new FileOutputStream(targerPath);

// 生成图片

ImageIO.write(buffImg, "JPG", os);

System.out.println("添加水印图片完成!");

} 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);

System.out.println("添加水印文字完成!");

} 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();

}

}

}

/**

* 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();

}

}

}