thumbnailator工具类代码实例

thumbnailator工具类代码实例

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
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.Position;

public class ImageUtil {
    public static void main(String[] args) throws IOException {
        int x = 0;
        int y = 0;//左上

        int w = 300;
        int h = 500;//右下
        imgSourceRegion("e:/upload/1508166546722.jpg", "e:/upload/top", x, y, x + w, y + h, 768, 576, true);
    }

    /**
     * 指定大小进行缩放 若图片横比width小，高比height小，不变 若图片横比width小，高比height大，高缩小到height，图片比例不变
     * 若图片横比width大，高比height小，横缩小到width，图片比例不变
     * 若图片横比width大，高比height大，图片按比例缩小，横为width或高为height
     *
     * @param source 输入源
     * @param output 输出源
     * @param width  宽
     * @param height 高
     * @throws IOException
     */
    public static void imgThumb(String source, String output, int width, int height, float quality) throws IOException {
        Thumbnails.of(source).size(width, height).outputQuality(quality).outputFormat("jpg").toFile(output);
    }

    /**
     * 指定大小进行缩放
     *
     * @param source 输入源
     * @param output 输出源
     * @param width  宽
     * @param height 高
     * @throws IOException
     */
    public static void imgThumb(File source, String output, int width, int height, float quality) throws IOException {
        Thumbnails.of(source).size(width, height).outputQuality(quality).outputFormat("jpg").toFile(output);
    }

    /**
     * 按照比例进行缩放
     *
     * @param source 输入源
     * @param output 输出源
     * @throws IOException
     */
    public static void imgScale(String source, String output, double scale) throws IOException {
        Thumbnails.of(source).scale(scale).outputFormat("jpg").toFile(output);
    }

    public static void imgScale(File source, String output, double scale) throws IOException {
        Thumbnails.of(source).scale(scale).outputFormat("jpg").toFile(output);
    }

    /**
     * 不按照比例，指定大小进行缩放
     *
     * @param source          输入源
     * @param output          输出源
     * @param width           宽
     * @param height          高
     * @param keepAspectRatio 默认是按照比例缩放的,值为false 时不按比例缩放
     */
    public static void imgNoScale(String source, String output, int width, int height, boolean keepAspectRatio)
            throws IOException {
        Thumbnails.of(source).size(width, height).keepAspectRatio(keepAspectRatio).outputFormat("jpg").toFile(output);
    }

    public static void imgNoScale(File source, String output, int width, int height, boolean keepAspectRatio)
            throws IOException {
        Thumbnails.of(source).size(width, height).keepAspectRatio(keepAspectRatio).outputFormat("jpg").toFile(output);
    }

    /**
     * 旋转 ,正数：顺时针 负数：逆时针
     *
     * @param source 输入源
     * @param output 输出源
     * @param width  宽
     * @param height 高
     * @param rotate 角度
     */
    public static void imgRotate(String source, String output, int width, int height, double rotate)
            throws IOException {
        Thumbnails.of(source).size(width, height).rotate(rotate).outputFormat("jpg").toFile(output);
    }

    public static void imgRotate(File source, String output, int width, int height, double rotate) throws IOException {
        Thumbnails.of(source).size(width, height).rotate(rotate).outputFormat("jpg").toFile(output);
    }

    /**
     * 水印
     *
     * @param source       输入源
     * @param output       输入源
     * @param width        宽
     * @param height       高
     * @param position     水印位置 Positions.BOTTOM_RIGHT o.5f
     * @param watermark    水印图片地址
     * @param transparency 透明度 0.5f
     * @param quality      图片质量 0.8f
     */
    public static void imgWatermark(String source, String output, int width, int height, Position position,
                                    String watermark, float transparency, float quality) throws IOException {
        Thumbnails.of(source).size(width, height).watermark(position, ImageIO.read(new File(watermark)), transparency)
                .outputQuality(0.8f).outputFormat("jpg").toFile(output);
    }

    public static void imgWatermark(File source, String output, int width, int height, Position position,
                                    String watermark, float transparency, float quality) throws IOException {
        Thumbnails.of(source).size(width, height).watermark(position, ImageIO.read(new File(watermark)), transparency)
                .outputQuality(0.8f).outputFormat("jpg").toFile(output);
    }

    /**
     * 裁剪图片
     *
     * @param source          输入源
     * @param output          输出源
     * @param position        裁剪位置
     * @param x               裁剪区域x
     * @param y               裁剪区域y
     * @param width           宽
     * @param height          高
     * @param keepAspectRatio 默认是按照比例缩放的,值为false 时不按比例缩放
     */
    public static void imgSourceRegion(String source, String output, Position position, int x, int y, int width,
                                       int height, boolean keepAspectRatio) throws IOException {
        Thumbnails.of(source).sourceRegion(position, x, y).size(width, height).keepAspectRatio(keepAspectRatio)
                .outputFormat("jpg").toFile(output);
    }

    public static void imgSourceRegion(File source, String output, Position position, int x, int y, int width,
                                       int height, boolean keepAspectRatio) throws IOException {
        Thumbnails.of(source).sourceRegion(position, x, y).size(width, height).keepAspectRatio(keepAspectRatio)
                .outputFormat("jpg").toFile(output);
    }

    /**
     * 按坐标裁剪
     *
     * @param source          输入源
     * @param output          输出源
     * @param x               起始x坐标
     * @param y               起始y坐标
     * @param x1              结束x坐标
     * @param y1              结束y坐标
     * @param width           宽
     * @param height          高
     * @param keepAspectRatio 默认是按照比例缩放的,值为false 时不按比例缩放
     */
    public static void imgSourceRegion(String source, String output, int x, int y, int x1, int y1, int width,
                                       int height, boolean keepAspectRatio) throws IOException {
        Thumbnails.of(source).sourceRegion(x, y, x1, y1).size(width, height).keepAspectRatio(keepAspectRatio)
                .toFile(output);
    }

    public static void imgSourceRegion(File source, String output, int x, int y, int x1, int y1, int width, int height,
                                       boolean keepAspectRatio) throws IOException {
        Thumbnails.of(source).sourceRegion(x, y, x1, y1).size(width, height).keepAspectRatio(keepAspectRatio)
                .outputFormat("jpg").toFile(output);
    }

    /**
     * 转化图像格式
     *
     * @param source 输入源
     * @param output 输出源
     * @param width  宽
     * @param height 高
     * @param format 图片类型，gif、png、jpg
     */
    public static void imgFormat(String source, String output, int width, int height, String format)
            throws IOException {
        Thumbnails.of(source).size(width, height).outputFormat(format).toFile(output);
    }

    public static void imgFormat(File source, String output, int width, int height, String format) throws IOException {
        Thumbnails.of(source).size(width, height).outputFormat(format).outputFormat("jpg").toFile(output);
    }

    /**
     * 输出到OutputStream
     *
     * @param source 输入源
     * @param output 输出源
     * @param width  宽
     * @param height 高
     * @return toOutputStream(流对象)
     */
    public static OutputStream imgOutputStream(String source, String output, int width, int height) throws IOException {
        OutputStream os = new FileOutputStream(output);
        Thumbnails.of(source).size(width, height).outputFormat("jpg").toOutputStream(os);
        return os;
    }

    public static OutputStream imgOutputStream(File source, String output, int width, int height) throws IOException {
        OutputStream os = new FileOutputStream(output);
        Thumbnails.of(source).size(width, height).outputFormat("jpg").toOutputStream(os);
        return os;
    }

    /**
     * 输出到BufferedImage
     *
     * @param source 输入源
     * @param output 输出源
     * @param width  宽
     * @param height 高
     * @param format 图片类型，gif、png、jpg
     * @return BufferedImage
     */
    public static BufferedImage imgBufferedImage(String source, String output, int width, int height, String format)
            throws IOException {
        BufferedImage buf = Thumbnails.of(source).size(width, height).outputFormat("jpg").asBufferedImage();
        ImageIO.write(buf, format, new File(output));
        return buf;
    }

    public static BufferedImage imgBufferedImage(File source, String output, int width, int height, String format)
            throws IOException {
        BufferedImage buf = Thumbnails.of(source).size(width, height).outputFormat("jpg").asBufferedImage();
        ImageIO.write(buf, format, new File(output));
        return buf;
    }
}

        jar包下载
         
        net.coobird
        thumbnailator
        0.4.8