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();
		

	}