Thumbnails 图片处理

package com.image;import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import javax.imageio.ImageIO;import net.coobird.thumbnailator.Thumbnails;import net.coobird.thumbnailator.geometry.Positions;/** *  * @author PanYu *  */public class ThumbnailatorTest {    /**     *      * @param args     * @throws IOException     */    public static void main(String[] args) throws IOException {        ThumbnailatorTest thumbnailatorTest = new ThumbnailatorTest();        thumbnailatorTest.test1();        thumbnailatorTest.test2();        thumbnailatorTest.test3();        thumbnailatorTest.test4();        thumbnailatorTest.test5();        thumbnailatorTest.test6();        thumbnailatorTest.test7();        thumbnailatorTest.test8();        thumbnailatorTest.test9();    }    /**     * 指定大小进行缩放     *      * @throws IOException     */    private void test1() throws IOException {        /*         * size(width,height) 若图片横比200小，高比300小，不变         * 若图片横比200小，高比300大，高缩小到300，图片比例不变 若图片横比200大，高比300小，横缩小到200，图片比例不变         * 若图片横比200大，高比300大，图片按比例缩小，横为200或高为300         */        Thumbnails.of("images/test.jpg").size(200, 300).toFile("C:/image_200x300.jpg");        Thumbnails.of("images/test.jpg").size(2560, 2048).toFile("C:/image_2560x2048.jpg");    }    /**     * 按照比例进行缩放     *      * @throws IOException     */    private void test2() throws IOException {        /**         * scale(比例)         */        Thumbnails.of("images/test.jpg").scale(0.25f).toFile("C:/image_25%.jpg");        Thumbnails.of("images/test.jpg").scale(1.10f).toFile("C:/image_110%.jpg");    }    /**     * 不按照比例，指定大小进行缩放     *      * @throws IOException     */    private void test3() throws IOException {        /**         * keepAspectRatio(false) 默认是按照比例缩放的         */        Thumbnails.of("images/test.jpg").size(120, 120).keepAspectRatio(false).toFile("C:/image_120x120.jpg");    }    /**     * 旋转     *      * @throws IOException     */    private void test4() throws IOException {        /**         * rotate(角度),正数：顺时针 负数：逆时针         */        Thumbnails.of("images/test.jpg").size(1280, 1024).rotate(90).toFile("C:/image+90.jpg");        Thumbnails.of("images/test.jpg").size(1280, 1024).rotate(-90).toFile("C:/iamge-90.jpg");    }    /**     * 水印     *      * @throws IOException     */    private void test5() throws IOException {        /**         * watermark(位置，水印图，透明度)         */        Thumbnails.of("images/test.jpg").size(1280, 1024).watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File("images/watermark.png")), 0.5f)                .outputQuality(0.8f).toFile("C:/image_watermark_bottom_right.jpg");        Thumbnails.of("images/test.jpg").size(1280, 1024).watermark(Positions.CENTER, ImageIO.read(new File("images/watermark.png")), 0.5f)                .outputQuality(0.8f).toFile("C:/image_watermark_center.jpg");    }    /**     * 裁剪     *      * @throws IOException     */    private void test6() throws IOException {        /**         * 图片中心400*400的区域         */        Thumbnails.of("images/test.jpg").sourceRegion(Positions.CENTER, 400, 400).size(200, 200).keepAspectRatio(false)                .toFile("C:/image_region_center.jpg");        /**         * 图片右下400*400的区域         */        Thumbnails.of("images/test.jpg").sourceRegion(Positions.BOTTOM_RIGHT, 400, 400).size(200, 200).keepAspectRatio(false)                .toFile("C:/image_region_bootom_right.jpg");        /**         * 指定坐标         */        Thumbnails.of("images/test.jpg").sourceRegion(600, 500, 400, 400).size(200, 200).keepAspectRatio(false).toFile("C:/image_region_coord.jpg");    }    /**     * 转化图像格式     *      * @throws IOException     */    private void test7() throws IOException {        /**         * outputFormat(图像格式)         */        Thumbnails.of("images/test.jpg").size(1280, 1024).outputFormat("png").toFile("C:/image_1280x1024.png");        Thumbnails.of("images/test.jpg").size(1280, 1024).outputFormat("gif").toFile("C:/image_1280x1024.gif");    }    /**     * 输出到OutputStream     *      * @throws IOException     */    private void test8() throws IOException {        /**         * toOutputStream(流对象)         */        OutputStream os = new FileOutputStream("C:/image_1280x1024_OutputStream.png");        Thumbnails.of("images/test.jpg").size(1280, 1024).toOutputStream(os);    }    /**     * 输出到BufferedImage     *      * @throws IOException     */    private void test9() throws IOException {        /**         * asBufferedImage() 返回BufferedImage         */        BufferedImage thumbnail = Thumbnails.of("images/test.jpg").size(1280, 1024).asBufferedImage();        ImageIO.write(thumbnail, "jpg", new File("C:/image_1280x1024_BufferedImage.jpg"));    }}