Java压缩或放大图像处理

大量的图片如何统一处理成固定宽度、或者固定长宽的图片，java中的java.awt包下面的一些类就可以实现图片处理的功能，下面就是自己写的一个简单的实例

     /**   
     *@Description: 压缩或放大图像处理 
     */   
    package cn.lulei.image.deal;    
      
    import java.awt.Color;  
    import java.awt.Font;  
    import java.awt.Graphics2D;  
    import java.awt.Image;  
    import java.awt.image.BufferedImage;  
    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;  
        
    public class DealImage {  
      
        private File file = null;  
        private String inputDir;  
        private String outputDir;  
        private String inputFileName;  
        private String outputFileName;  
        private int outputWidth;  
        private int outputHeight;  
        private boolean proportion;//是否等比压缩  
          
        public DealImage() {  
            this.inputDir = "";  
            this.outputDir = "";  
            this.inputFileName = "";  
            this.outputFileName = "";  
            this.outputHeight = 200;  
            this.outputWidth = 200;  
            this.proportion = true;  
        }  
          
        public void setInputDir(String inputDir){  
            this.inputDir = inputDir;  
        }  
        public void setOutputDir(String outputDir){  
            this.outputDir = outputDir;  
        }  
        public void setInputFileName(String inputFileName){  
            this.inputFileName = inputFileName;  
        }  
        public void setOutputFileName(String outputFileName){  
            this.outputFileName = outputFileName;  
        }  
        public void setWidthAngHeight(int outputWidth,int outputHeight){  
            this.outputWidth = outputWidth;  
            this.outputHeight = outputHeight;  
        }  
          
        /** 
         * @param isVip 
         * @Date: 2013-8-7   
         * @Author: lulei   
         * @Description:处理图片 
         */  
        private void dealImage(boolean isVip) {  
            try {  
                this.file = new File(this.inputDir + this.inputFileName);  
                if (!this.file.exists()){  
                    return;  
                }  
                Image img = ImageIO.read(this.file);  
                if (img.getWidth(null) == -1) {  
                    return;  
                }  
                int[] widthAndHeight = this.getNewWidthAndHeight(img);  
                BufferedImage bufferedImage = new BufferedImage(widthAndHeight[0],widthAndHeight[1],BufferedImage.TYPE_INT_RGB);  
                Graphics2D g = bufferedImage.createGraphics();  
                g.drawImage(img.getScaledInstance(widthAndHeight[0],Image.SCALE_SMOOTH),null);  
                if (!isVip) {  
                    g.setFont(new Font("楷体",Font.ITALIC,14));  
                    g.setColor(Color.getHSBColor(1.0f,0.3f,1.0f));  
                    g.drawString("想要添加的水印",widthAndHeight[0]/3,widthAndHeight[1]/2);  
                }  
                File fileOut = new File(this.outputDir);  
                if (!fileOut.exists()) {  
                    fileOut.mkdirs();  
                }  
                FileOutputStream fileOutputStream = new FileOutputStream(this.outputDir + this.outputFileName);  
                JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fileOutputStream);  
                encoder.encode(bufferedImage);  
                g.dispose();  
                fileOutputStream.close();  
            } catch (Exception e) {  
    //          e.printStackTrace();  
                System.out.println("There're some errors when handling picture which path is :" + this.inputDir + this.inputFileName);  
            }  
        }  
          
        /** 
         * @param inputDir 
         * @param inputFileName 
         * @param outputDir 
         * @param outputFileName 
         * @param isVip 
         * @Date: 2013-8-7   
         * @Author: lulei   
         * @Description:处理图片 
         */  
        public void dealImage(String inputDir,String inputFileName,String outputDir,String outputFileName,boolean isVip) {  
            this.dealImage(inputDir,inputFileName,outputDir,outputFileName,this.outputWidth,this.outputHeight,this.proportion,isVip);  
        }  
          
        /** 
         * @param inputDir 
         * @param inputFileName 
         * @param outputDir 
         * @param outputFileName 
         * @param outputWidth 
         * @param outputHeight 
         * @param isVip 
         * @Date: 2013-8-7   
         * @Author: lulei   
         * @Description:处理图片 
         */  
        public void dealImage(String inputDir,int outputWidth,int outputHeight,outputWidth,outputHeight,isVip);  
        }  
          
        /** 
         * @param inputDir 
         * @param inputFileName 
         * @param outputDir 
         * @param outputFileName 
         * @param outputWidth 
         * @param outputHeight 
         * @param proportion 
         * @param isVip 
         * @Date: 2013-8-7   
         * @Author: lulei   
         * @Description:处理图片 
         */  
        public void dealImage(String inputDir,boolean proportion,boolean isVip) {  
            this.inputDir = inputDir;  
            this.inputFileName = inputFileName;  
            this.outputDir = outputDir;  
            this.outputFileName = outputFileName;  
            this.outputWidth = outputWidth;  
            this.outputHeight = outputHeight;  
            this.proportion = proportion;  
            this.dealImage(isVip);  
        }  
          
        /** 
         * @param img 
         * @return 
         * @Date: 2013-8-7   
         * @Author: lulei   
         * @Description:返回压缩后的图片宽和高 
         */  
        private int[] getNewWidthAndHeight(Image img){  
            int[] reInt = new int[2];  
            if (this.proportion) {  
                double rateW = ((double)img.getWidth(null)) / (double)this.outputWidth + 0.1;  
                double rateH = ((double)img.getHeight(null)) / (double)this.outputHeight + 0.1;  
                double rate = rateW > rateH ? rateW :rateH;  
                reInt[0] = (int)(((double)img.getWidth(null)) / rate);  
                reInt[1] = (int)(((double)img.getHeight(null)) / rate);  
            } else {  
                reInt[0] = this.outputWidth;  
                reInt[1] = this.outputHeight;  
            }  
            return reInt;  
        }  
    }  

 

 

下面的类是对图片文件或者图片文件夹做统一的处理：
Java代码  收藏代码

     /**   
     *@Description:   批处理文件夹下的所有图片   
     */   
    package cn.lulei.image.deal;    
      
    import java.io.File;  
      
    import cn.lulei.image.deal.DealImage;  
        
        
    public class DealImageFile {  
          
        //图片后缀名  
        private static String[] IMG_TYPE = {".jpg",".bmp",".jpeg",".png",".pcx",".tiff",".gif",".tga",".exif",".fpx",".svg",".psd","cdr",".pcd",".dxf",".ufo",".eps",".hdri",".ai",".raw"};   
        private static int outputHeight = 200;  
        private static int outputWidth = 200;  
        private static int count = 0;  
        private static boolean proportion = true;  
          
        public String dealImageFile(String inputDir,String outputDir) {  
            return this.dealImageFile(inputDir,proportion);  
        }  
          
        public String dealImageFile(String inputDir,int outputHeight) {  
            return this.dealImageFile(inputDir,proportion);  
        }  
        /** 
         * @param inputDir 
         * @param outputDir 
         * @param outputWidth 
         * @param outputHeight 
         * @param proportion 
         * @return 
         * @Date: 2013-8-7   
         * @Author: lulei   
         * @Description:批处理文件夹下的文件 
         */  
        public String dealImageFile(String inputDir,boolean proportion) {  
            File fileDir = new File(inputDir);  
            File[] files = fileDir.listFiles();  
            DealImage dealImage = new DealImage();  
            for (File file : files) {  
                String imgPath = file.toString().toLowerCase();  
                String fileName = imgPath.substring(inputDir.length());  
                if (this.isImage(imgPath)) {  
                    dealImage.dealImage(inputDir,fileName,proportion,true);  
                    count++;   
                } else if (file.isDirectory()) {  
                    if (!imgPath.equals(outputDir.toLowerCase())) {  
                        //这里是递归  
                        this.dealImageFile(imgPath,outputDir + "/" + fileName,proportion);  
                    }  
                }  
            }  
            return "Handle " + count + " pictures! ";  
        }  
          
        private boolean isImage(String imgPath) {  
            for (String str : IMG_TYPE) {  
                if (imgPath.endsWith(str)) {  
                    return true;  
                }  
            }  
            return false;  
        }  
          
        public static void main(String[] args) {  
            // TODO Auto-generated method stub    
              
        }  
      
    }