JMagick处理图片代码收集

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Java

JMagick ImageMagick

写在前面的话：

如果要在Web Application Server(Resin,Tomcat)，需要再运行时加入参数： -Djmagick.systemclassloader=no

或者在程序中写入：System.setProperty("jmagick.systemclassloader", "no");

但是，个人在JBoss上，后者不太管用，所以，建议大家用前者，即启动服务器时加启动参数！

(//Tell jmagick.magick.Magick to not use the system ClassLoader)

可能遇到的问题：

Exceptions/Errors:
java.lang.NoClassDefFoundError: Could not initialize class magick.ImageInfo
java.lang.UnsatisfiedLinkError: no JMagick in java.library.path

Things I've tried so far:
1) copied jmagick.jar to JAVA_HOME/jre/lib/ext
2) copied jmagick.jar to tomcat（your server） common lib & webapp/web-inf/lib
3) set LD_LIBRARY_PATH=/usr/local/lib in tomcat startup script
4) tried setting -Djava.library.path=/usr/local/lib -Djmagick.systemclassloader=no in tomcat startup script

自己收藏一下JMagick处理图片的代码，方便随时查阅：

package org.wsr.util;

import java.awt.Dimension;  
import java.awt.Point;  
import java.awt.Rectangle;  
import java.io.File;  
  
import magick.CompositeOperator;  
import magick.CompressionType;  
import magick.DrawInfo;  
import magick.ImageInfo;  
import magick.MagickException;  
import magick.MagickImage;  
import magick.PixelPacket;  
import magick.PreviewType;  
  
public class JMagicjWrapper {  
	
public static void main(String[] args) throws MagickException{  
        
        //test for function imageResize   
          
//        JMagicjWrapper.imageResize("pics.jpg", "reSize20x30.png", 20, 30);  
//        JMagicjWrapper.imageResize("pics.jpg", "reSize250x200.jpeg", 250, 200);  
//        JMagicjWrapper.imageResize("pics.jpg", "reSize50x50.jpg", 50, 50);  
//        JMagicjWrapper.imageResize("pics.jpg", "reSize120x120.bmp", 120, 120);  
//        JMagicjWrapper.imageResize("pics.jpg", "reSize.tif", 20, 30);//not create file   
//          
          
        //test for function createWaterPrintByImg   
        JMagicjWrapper.createWaterPrintByImg("f://1.jpg", "f://4.jpg", "f://watermark.gif", new Point(0,0));  
        //JMagicjWrapper.imageResize("wpl.gif", "logo250x200.gif", 250, 200);  
        //Because file "wpl.gif" may not be release, the later function cause a error, can not open file handle.   
        //JMagicjWrapper.createWaterPrintByImg("pics.jpg", "wpl.gif", "logoFull.jpg", new Point(1680,1050));//not create file   
        //JMagicjWrapper.createWaterPrintByImg("pics.jpg", "wpl.gif", "logoExt.jpg", new Point(2000,1000));//not create file   
          
        //test for function createWaterPrintByText   
        //This function can not handle Chinese Character, I'll continue to takle the issue    
        //JMagicjWrapper.createWaterPrintByText("pics1.jpg", "wpt.gif", "For Test", new Point(300,300), 100);  
    }  
  
    private static final String[] Type = {  
        ".JPG",  
        ".JPEG",  
        ".BMP",  
        ".GIF",  
        ".PNG"  
    };  
      
    public static boolean checkType(String path){  
        for (int i = 0; i < Type.length; i++) {  
            if (path.toUpperCase().endsWith(Type[i])) {  
                return true;  
            }else {  
                continue;  
            }  
        }  
        return false;  
    }  
      
    /**改变图片大小 
     * @param   filePath    原图片位置 
     *          toPath      新图片位置 
     *          width       新图片的宽度 
     *          height      新图片的高度 
     * @return  
     * @throw 
     * @author sulliy@sina.com 2010-8-11 
     */  
    public static void imageResize(String filePath, String toPath, int width, int height)  
            throws MagickException {  
        ImageInfo info = null;  
        MagickImage image = null;  
        Dimension imageDim = null;  
        MagickImage scaled = null;  
          
        if (!checkType(filePath) || !checkType(toPath)) {  
            return;  
        }  
          
        try {  
            info = new ImageInfo();
            image = new MagickImage(info);  
            imageDim = image.getDimension();  
            if (width <= 0 || height <= 0) {  
                height = 120;  
                width = 120;  
            }  
            scaled = image.scaleImage(width, height);  
            scaled.setFileName(toPath);  
            scaled.writeImage(info);  
        } finally {  
            if (scaled != null) {  
                scaled.destroyImages();  
            }  
        }  
    }  
  
    /**创建图片水印 
     * @param       filePath    源文件路径 
     *              toImg       生成文件位置 
     *              logoPath    logo路径 
     *              pos         logo在源图片中的相对位置，以像素点为单位 
     * @return  
     * @throw   MagickException 
     * @author sulliy@sina.com 2010-8-11 
     */  
    public static void createWaterPrintByImg(String filePath, String toImg,  
            String logoPath, Point pos) throws MagickException {  
        if (!checkType(filePath) || !checkType(toImg) || !checkType(logoPath)) {  
            return;  
        }
          
       ImageInfo info = new ImageInfo();  
        MagickImage fImage = null;  
        MagickImage sImage = null;  
        MagickImage fLogo = null;  
        MagickImage sLogo = null;  
        Dimension imageDim = null;
        Dimension logoDim = null;
        try {
        	//原来图片
            fImage = new MagickImage(new ImageInfo(filePath));
            imageDim = fImage.getDimension();
            int width = imageDim.width;
            int height = imageDim.height;
            sImage = fImage.scaleImage(width, height);
              
            fLogo = new MagickImage(new ImageInfo(logoPath));
            logoDim = fLogo.getDimension();
            int lw = logoDim.width;
            int lh = logoDim.height;
            sLogo = fLogo.scaleImage(lw, lh);
              
            //开始打水印，从左上角开始;如果到右边界则重新开始一行的打印(x=0,y=y+h)
            int startX = 0;
            int startY = 0;
            do {            	
                sImage.compositeImage(CompositeOperator.AtopCompositeOp, sLogo,  
                        startX, startY);
                startX += (logoDim.width + 60);
            	if (startX >= width){
            		startY += logoDim.height * 2;
            		startX = 0;
            	}
    		} while(startY <= height);
            
            sImage.setFileName(toImg);
            sImage.writeImage(info);
        } finally {
            if (fImage != null) {
                fImage.destroyImages();
            }
            if (sImage != null) {
            	sImage.destroyImages();
            }
            if (fLogo != null) {
            	fLogo.destroyImages();
            }
            if (sLogo != null) {
            	sLogo.destroyImages();
            }
        }
    }
  
    /**创建文字水印 
     * @param       filePath    源文件路径 
     *              toImg       生成文件位置 
     *              text        水印文本 
     *              pos         logo在源图片中的相对位置，以像素点为单位 
     *              pointSize   用于设置点阵大小 
     * @return  
     * @throw   MagickException 
     * @author sulliy@sina.com 2010-8-11 
     */  
    public static void createWaterPrintByText(String filePath, String toImg, String text  
            , Point pos, int pointSize)  
            throws MagickException {  
        if (!checkType(filePath) || !checkType(toImg)) {  
            return;  
        }  
          
        if (null == text || "".equals(text)) {  
            text = "sulliy@sina.com";  
        }  
          
        ImageInfo info = new ImageInfo(filePath);  
        if (filePath.toUpperCase().endsWith("JPG")  
                || filePath.toUpperCase().endsWith("JPEG")) {  
            info.setCompression(CompressionType.JPEGCompression); // 压缩类别为JPEG格式   
            info.setPreviewType(PreviewType.JPEGPreview); // 预览格式为JPEG格式   
            info.setQuality(95);  
        }  
        MagickImage aImage = new MagickImage(info);  
        Dimension imageDim = aImage.getDimension();  
        int width = imageDim.width;  
        int height = imageDim.height;  
          
        if (width <= (int)pos.getX() || height <= (int)pos.getY()) {  
            pos.setLocation(0, 0);  
        }  
          
        int a = 0;  
        int b = 0;  
        String[] as = text.split("");  
        for (String string : as) {  
            if (string.matches("[/u4E00-/u9FA5]")) {  
                a++;  
            }  
            if (string.matches("[a-zA-Z0-9]")) {  
                b++;  
            }  
        }  
        int tl = a * 12 + b * 6 ;//字符长度   
        MagickImage scaled = aImage.scaleImage(width, height);  
        if (width > tl && height > 5) {  
            DrawInfo aInfo = new DrawInfo(info);  
            aInfo.setFill(PixelPacket.queryColorDatabase("white"));  
            aInfo.setUnderColor(new PixelPacket(65535, 65535, 65535, 65535));//设置为透明颜色   
            aInfo.setPointsize(pointSize);  
            // 解决中文乱码问题,自己可以去随意定义个自己喜欢字体，我在这用的微软雅黑   
            String fontPath = "C:/WINDOWS/Fonts/MSIMHEI.TTF";  
            // String fontPath = "/usr/maindata/MSYH.TTF";   
            aInfo.setFont(fontPath);  
            aInfo.setTextAntialias(true);  
            aInfo.setOpacity(0);//透明度   
            aInfo.setText(text);  
            aInfo.setGeometry("+" + ((int)pos.getX() + "+" + (int)pos.getY()));  
            scaled.annotateImage(aInfo);  
        }  
        scaled.setFileName(toImg);  
        scaled.writeImage(info);  
        scaled.destroyImages();  
    }  
  
    /**切取图片 
     * @param       imgPath     原图路径 
     *              toPath      生成文件位置 
     *              w           左上位置横坐标 
     *              h           左上位置竖坐标 
     *              x           右下位置横坐标 
     *              y           右下位置竖坐标 
     * @return  
     * @throw   MagickException 
     * @author sulliy@sina.com 2010-8-11 
     */  
    public static void cutImg(String imgPath, String toPath, int w, int h,  
            int x, int y) throws MagickException {  
        ImageInfo infoS = null;  
        MagickImage image = null;  
        MagickImage cropped = null;  
        Rectangle rect = null;  
        try {  
            infoS = new ImageInfo(imgPath);  
            image = new MagickImage(infoS);  
            rect = new Rectangle(x, y, w, h);  
            cropped = image.cropImage(rect);  
            cropped.setFileName(toPath);  
            cropped.writeImage(infoS);  
  
        } finally {  
            if (cropped != null) {  
                cropped.destroyImages();  
            }  
        }  
    }  
      
    /**删除图片文件 
     * @param   src     图片位置 
     * @return  
     * @throw 
     * @author sulliy@sina.com 2010-8-11 
     */  
    public static boolean removeFile(String src) throws SecurityException{  
        try {  
            if (!checkType(src)) {  
                return false;  
            }  
              
            File file = new File(src);  
            return file.delete();         
        } catch (Exception e) {  
            e.printStackTrace();  
            return false;  
        }  
    }
    
}

参考：

1、http://blog.csdn.net/sulliy/article/details/5805709

2、http://txf2004.iteye.com/blog/989659

3、http://txf2004.iteye.com/blog/989658

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