Thumbnails的使用

因为项目需要做一个图片的微服务，用到了mongoDB,springboot,springCloud,等。其中因为需要对图片做处理。查看资料看到Thumbnails，于是，对Thumbnails的功能做了一些简单的使用。

这是两张原图，及路径。

 public static void test2() throws IOException{ File file = new File("E:/图像/juan_/test_s/juan_yts1.jpg"); // 指定坐标 Thumbnails.of(file).sourceRegion(3850, 1500, 600, 2000).size( 600, 2000).keepAspectRatio(false).toFile( "E:/图像/juan_/test_c/juan_backup20.jpg"); } 

这是裁剪过后的图片

private static void test1() throws FileNotFoundException, IOException{ File file = new File("E:/图像/juan_/test_s/xifu_66.jpg"); //scale0.3是一个double类型的数字，缩放比例，大于1就是变大，小于1就是缩小 //Thumbnails.of(new FileInputStream(file)).scale(0.3).toFile(new File("E:/图像/juan_/juan_buck.jpg")); //按照比例进行缩放 Thumbnails.of(file).scale(0.25f).toFile("E:/图像/juan_/test_c/juan_backup1.jpg"); Thumbnails.of(file).scale(1.10f).toFile("E:/图像/juan_/test_c/juan_backup2.jpg"); //指定大小进行缩放 Thumbnails.of(file).size(200, 300).toFile("E:/图像/juan_/test_c/juan_backup3.jpg"); Thumbnails.of(file).size(2560, 2048).toFile("E:/图像/juan_/test_c/juan_backup4.jpg"); //旋转 Thumbnails.of(file).size(1280, 1024).rotate(90).toFile("E:/图像/juan_/test_c/juan_backup5.jpg"); Thumbnails.of(file).size(1280, 1024).rotate(-90).toFile("E:/图像/juan_/test_c/juan_backup6.jpg"); / * 不按照比例，指定大小进行缩放 * keepAspectRatio(false) 默认是按照比例缩放的 */ Thumbnails.of(file).size(120, 120).keepAspectRatio(false).toFile("E:/图像/juan_/test_c/juan_backup7.jpg"); // 水印 watermark(位置，水印图，透明度) Thumbnails.of(file).size(1280, 1024).watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File("E:/图像/juan_/test_c/juan_backup20.jpg")), 0.5f) .outputQuality(0.8f).toFile("E:/图像/juan_/test_c/juan_backup8.jpg"); Thumbnails.of(file).size(1280, 1024).watermark( Positions.CENTER, ImageIO.read(new File("E:/图像/juan_/test_c/juan_backup20.jpg")), 0.5f) .outputQuality(0.8f).toFile("E:/图像/juan_/test_c/juan_backup9.jpg"); //裁剪 // 图片中心400*400的区域 Thumbnails.of(file).sourceRegion(Positions.CENTER, 400, 400).size(200, 200).keepAspectRatio(false).toFile( "E:/图像/juan_/test_c/juan_backup10.jpg"); // 图片右下400*400的区域 Thumbnails.of(file).sourceRegion(Positions.BOTTOM_RIGHT, 400, 400).size(200, 200).keepAspectRatio(false).toFile( "E:/图像/juan_/test_c/juan_backup11.jpg"); // 指定坐标 Thumbnails.of(file).sourceRegion(600, 500, 400, 400).size( 200, 200).keepAspectRatio(false).toFile( "E:/图像/juan_/test_c/juan_backup12.jpg"); //转化图像格式 / * outputFormat(图像格式) */ Thumbnails.of(file).size(1280, 1024).outputFormat("jpeg") .toFile("E:/图像/juan_/test_c/juan_backup13.jpeg"); Thumbnails.of(file).size(1280, 1024).outputFormat("gif") .toFile("E:/图像/juan_/test_c/juan_backup14.gif"); Thumbnails.of(file).size(1280, 1024).outputFormat("jpg") .toFile("E:/图像/juan_/test_c/juan_backup15.jpg"); Thumbnails.of(file).size(1280, 1024).outputFormat("bmp") .toFile("E:/图像/juan_/test_c/juan_backup16.bmp"); //输出到OutputStream //toOutputStream(流对象) OutputStream os = new FileOutputStream( "E:/图像/juan_/test_c/juan_backup17.jpg"); Thumbnails.of(file).size(1280, 1024).toOutputStream(os); // 输出到BufferedImage / * asBufferedImage() 返回BufferedImage */ BufferedImage thumbnail = Thumbnails.of(file).size(1280, 1024).asBufferedImage(); ImageIO.write(thumbnail, "jpg", new File( "E:/图像/juan_/test_c/juan_backup18.jpg")); }

水印

package test; import java.awt.image.BufferedImage; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.UUID; import javax.imageio.ImageIO; import net.coobird.thumbnailator.Thumbnails; import net.coobird.thumbnailator.Thumbnails.Builder; import net.coobird.thumbnailator.geometry.Positions; public class LiunnTest { private static final float PIC_SIZE = 500 * 1024; public static void main(String[] args) throws FileNotFoundException, IOException { // TODO Auto-generated method stub test1(); }