Java图片高优化压缩

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Java进行图片压缩，能够等比压缩和同等图片大小压缩
现在我要去项目合并使用了，自己看源代码吧
import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder;import javax.imageio.ImageIO;import java.awt.*;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;public class CompressPicDemo {    private File file = null; // 文件对象    private String inputDir; // 输入图路径    private String outputDir; // 输出图路径    private String inputFileName; // 输入图文件名    private String outputFileName; // 输出图文件名    private int outputWidth = 2000; // 默认输出图片宽    private int outputHeight = 2000; // 默认输出图片高    private boolean proportion = true; // 是否等比缩放标记(默认为等比缩放)    public CompressPicDemo() { // 初始化变量        inputDir = "";        outputDir = "";        inputFileName = "";        outputFileName = "";        outputWidth = 2000;        outputHeight = 2000;    }    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 setOutputWidth(int outputWidth) {        this.outputWidth = outputWidth;    }    public void setOutputHeight(int outputHeight) {        this.outputHeight = outputHeight;    }    public void setWidthAndHeight(int width, int height) {        this.outputWidth = width;        this.outputHeight = height;    }    /*     * 获得图片大小     * 传入参数 String path ：图片路径     */    public long getPicSize(String path) {        file = new File(path);        return file.length();    }    // 图片处理    public String compressPic() {        try {            //获得源文件            file = new File(inputDir + inputFileName);            if (!file.exists()) {                return "";            }            Image img = ImageIO.read(file);            // 判断图片格式是否正确            if (img.getWidth(null) == -1) {                System.out.println(" can't read,retry!" + "<BR>");                return "no";            } else {                int newWidth;                int newHeight;                // 判断是否是等比缩放                if (this.proportion == true) {                    // 为等比缩放计算输出的图片宽度及高度                    double rate1 = ((double) img.getWidth(null)) / (double) outputWidth + 0.1;                    double rate2 = ((double) img.getHeight(null)) / (double) outputHeight + 0.1;                    // 根据缩放比率大的进行缩放控制                    double rate = rate1 > rate2 ? rate1 : rate2;                    newWidth = (int) (((double) img.getWidth(null)) / rate);                    newHeight = (int) (((double) img.getHeight(null)) / rate);                } else {                    newWidth = img.getWidth(null); // 输出的图片宽度                    newHeight = img.getHeight(null); // 输出的图片高度                }                BufferedImage tag = new BufferedImage((int) newWidth, (int) newHeight, BufferedImage.TYPE_INT_RGB);                 /*                 * Image.SCALE_SMOOTH 的缩略算法 生成缩略图片的平滑度的                 * 优先级比速度高 生成的图片质量比较好 但速度慢                 */                tag.getGraphics().drawImage(img.getScaledInstance(newWidth, newHeight, Image.SCALE_SMOOTH), 0, 0, null);                FileOutputStream out = new FileOutputStream(outputDir + outputFileName);                // JPEGImageEncoder可适用于其他图片类型的转换                JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);                encoder.encode(tag);                out.close();            }        } catch (IOException ex) {            ex.printStackTrace();        }        return "ok";    }    public String compressPic(String inputDir, String outputDir, String inputFileName, String outputFileName) {        // 输入图路径        this.inputDir = inputDir;        // 输出图路径        this.outputDir = outputDir;        // 输入图文件名        this.inputFileName = inputFileName;        // 输出图文件名        this.outputFileName = outputFileName;        return compressPic();    }    public String compressPic(String inputDir, String outputDir, String inputFileName, String outputFileName, int width, int height, boolean gp) {        // 输入图路径        this.inputDir = inputDir;        // 输出图路径        this.outputDir = outputDir;        // 输入图文件名        this.inputFileName = inputFileName;        // 输出图文件名        this.outputFileName = outputFileName;        // 设置图片长宽        setWidthAndHeight(width, height);        // 是否是等比缩放 标记        this.proportion = gp;        return compressPic();    }    // main测试    // compressPic(大图片路径,生成小图片路径,大图片文件名,生成小图片文名,生成小图片宽度,生成小图片高度,是否等比缩放(默认为true))    public static void main(String[] args) {        CompressPicDemo mypic = new CompressPicDemo();        System.out.println("输入的图片大小：" + mypic.getPicSize("e:\\P50202-105817.jpg") / 1024 + "KB");        mypic.compressPic("e:\\", "e:\\", "P50202-105817.jpg", "aP50202-105817.jpg", 100, 100, false);        mypic.compressPic("e:\\", "e:\\", "P50202-105817.jpg", "bP50202-105817.jpg", 2000, 2000, true);    }}
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