JAVA制作水印效果,字体和图片,调节透明度,使用了JIMI的类库

import java.io.IOException;

import java.awt.Graphics;

import java.awt.*;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.awt.image.ImageProducer;

import java.io.File;

import java.io.FileOutputStream;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

import com.sun.jimi.core.Jimi;

import com.sun.jimi.core.JimiException;

import com.sun.jimi.core.JimiWriter;

import com.sun.jimi.core.options.JPGOptions;

/**

* java做水印,字体和图片,调节透明度.

*

* @author myjava_024,老紫竹 JAVA世纪网(java2000.net)

*

*/

public class T {

/**

* 将任何格式的图片转换成JPG图片 source原图片路径 dest 转换后图片的路径

*/

public void toReduce(String source, String dest) {

try {

JPGOptions options = new JPGOptions();

options.setQuality(100);

// 图片格式在jimi的解码格式范围内

ImageProducer image = Jimi.getImageProducer(source);

// 图片编码

JimiWriter writer = Jimi.createJimiWriter(dest);

writer.setSource(image);

// 对输出文件的属性进行相关的设置，每种格式的属性都不一样

writer.setOptions(options);

writer.putImage(dest);

} catch (JimiException je) {

System.err.println("Error: " + je);

je.printStackTrace();

}

}

/**

* 实现对图片的抽取缩略并控制生成图的大小 oldfile原图片路径 newfile缩略后的 图片路径 wideths 缩略后图片的宽

* heights缩略后图片的高

*/

public void changDimension(String oldfile, String newfile, int wideths,

int heights) throws JimiException, IOException {

String temp = newfile;

File inputfile = null;

this.toReduce(oldfile, temp);

// 读入文件

inputfile = new File(temp);

// 构造Image对象

Image src = ImageIO.read(inputfile);

// double wideth = (double) src.getWidth(null); // 得到源图宽

// double height = (double) src.getHeight(null); // 得到源图长

int iWideth = wideths;

int iHeight = heights;

BufferedImage tag = null;

try {

tag = new BufferedImage(iWideth, iHeight, BufferedImage.TYPE_INT_RGB);

// 绘制缩小后的图

tag.getGraphics().drawImage(src, 0, 0, iWideth, iHeight, null);

JimiWriter writer = Jimi.createJimiWriter(newfile);

writer.setSource(tag);

writer.putImage(newfile);

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 给图片添加文字 oldfile newfile就不用多说了 text 就是给图片加的文字

*/

public void Imagefont(String oldfile, String newfile, String text) {

Image img;

String filename = oldfile.substring(oldfile.lastIndexOf(".") + 1);

String temp = newfile;

try {

if (!filename.equals("jpg")) {

this.toReduce(oldfile, newfile);

img = ImageIO.read(new File(temp));

} else {

img = ImageIO.read(new File(oldfile));

}

int width = img.getWidth(null);

int height = img.getHeight(null);

BufferedImage image = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics g = image.createGraphics();

g.drawImage(img, 0, 0, width, height, null);

g.setColor(Color.red);

g.setFont(new Font("Courier", Font.HANGING_BASELINE, 40));

g.drawString(text, width - 360, height - 72);

g.dispose();

FileOutputStream os = new FileOutputStream(temp);

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(os);

encoder.encode(image);

} catch (Exception e) {

e.getMessage();

}

}

/**

* 给图片添加水印，并控制水印图片的位置及透明度 oldfile newfile我也不说了 syoldfile 要添加的水印图片的路径 t

* 水印图品添加的位置 to 水印图片的透明度

*/

public void Imagese(String oldfile, String newfile, String syoldfile, int t,

float to) {

// 文件类型

String filename = oldfile.substring(oldfile.lastIndexOf(".") + 1);

System.out.println(filename);

Image img;

String temp = newfile;

float alpha = to;

try {

if (!filename.equals("jpg")) {

toReduce(oldfile, newfile);

img = ImageIO.read(new File(temp));

System.out.println("其他类型图片创建生成水印的图片");

} else {

img = ImageIO.read(new File(oldfile));

}

int width = img.getWidth(null);

int height = img.getHeight(null);

int ws = width / 3;

int hs = height / 3;

BufferedImage image = new BufferedImage(width, height,

BufferedImage.TYPE_INT_RGB);

Graphics2D g = image.createGraphics();

g.drawImage(img, 0, 0, width, height, null);

Image logo = ImageIO.read(new File(syoldfile));

int lw = logo.getWidth(null);

int lh = logo.getHeight(null);

// 设置图片透明度

g

.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,

alpha));

g.drawImage(logo, null, null);

switch (t) {

case 1:

g.drawImage(logo, 0, 0, lw, lh, null);

System.out.println("布局一");

break;

case 2:

g.drawImage(logo, ws, 0, lw, lh, null);

System.out.println("布局二");

break;

case 3:

g.drawImage(logo, 2 * ws, 0, lw, lh, null);

System.out.println("布局三");

break;

case 4:

g.drawImage(logo, 0, hs, lw, lh, null);

System.out.println("布局四");

break;

case 5:

g.drawImage(logo, ws, hs, lw, lh, null);

System.out.println("布局五");

break;

case 6:

g.drawImage(logo, 2 * ws, hs, lw, lh, null);

System.out.println("布局六");

break;

case 7:

g.drawImage(logo, 0, 2 * hs, lw, lh, null);

System.out.println("布局七");

break;

case 8:

g.drawImage(logo, ws, 2 * hs, lw, lh, null);

System.out.println("布局八");

break;

case 9:

g.drawImage(logo, 2 * ws, 2 * hs, lw, lh, null);

System.out.println("布局九");

break;

default:

break;

}

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

g.dispose();

// 生成图片

FileOutputStream oss = new FileOutputStream(temp);

JPEGImageEncoder encoders = JPEGCodec.createJPEGEncoder(oss);

encoders.encode(image);

} catch (Exception e) {

e.getMessage();

e.printStackTrace();

}

}

public static void main(String[] args) {

T test = new T();

// alpha表示透明度，alpha 必须是范围 [0.0, 1.0] 之内（包含边界值）的一个浮点数字

float alpha = 0.1f;

// 生成水印图

test.Imagese("d:/eclipse.jpg", "d:/eclipse_java2000.jpg",

"d:/java2000.jpg", 1, alpha);

/*

* test.Imagese("d:/001.jpg", "d:/aa/001.jpg", "d:/002.jpg", 1, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/002.jpg", "d:/002.jpg", 2, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/003.jpg", "d:/002.jpg", 3, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/004.jpg", "d:/002.jpg", 4, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/005.jpg", "d:/002.jpg", 5, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/006.jpg", "d:/002.jpg", 6, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/007.jpg", "d:/002.jpg", 7, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/008.jpg", "d:/002.jpg", 8, alpha);

* test.Imagese("d:/001.jpg", "d:/aa/009.jpg", "d:/002.jpg", 9, alpha);

*/

}

}