Campus Shop -4 store registration function module -3thumbnailator picture processing and packaging Util

1. Initial use thumbnailator

1.1 download dependence

<!-- https://mvnrepository.com/artifact/net.coobird/thumbnailator -->
<dependency>
    <groupId>net.coobird</groupId>
    <artifactId>thumbnailator</artifactId>
    <version>0.4.8</version>
</dependency>

1.2 GitHub add a watermark image example

Thumbnails.of(new File("original.jpg"))//原始图片
        .size(160, 160)//指定图片的大小
        .rotate(90)//旋转
        .watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File("watermark.png")), 0.5f)//水印的位置、水印图片、透明度0.0f~1.0f
        .outputQuality(0.8)//输出图片质量
        .toFile(new File("image-with-watermark.jpg"));//输出图片存放位置

1.3 Example

package com.csj2018.o2o.util;

import java.io.File;

import javax.imageio.ImageIO;

import net.coobird.thumbnailator.Thumbnails;
import net.coobird.thumbnailator.geometry.Positions;

public class ImageUtil {
    public static void main(String[] args) throws Exception {
        String basePath = Thread.currentThread().getContextClassLoader().getResource("").getPath();
        //先获取新的水印
        Thumbnails.of(new File(basePath + "water.png")).size(30, 30).toFile(new File(basePath + "newwater.png"));
        //添加水印
        Thumbnails.of(new File("/Users/chenshanju/Downloads/cat.jpg")).size(200, 200)
                .watermark(Positions.BOTTOM_RIGHT, ImageIO.read(new File(basePath + "newwater.png")), 1.0f)
                .outputQuality(0.8).toFile("/Users/chenshanju/Downloads/newcat.jpg");
    }
}

2.