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feat: 添加图片处理工具类（Thumbnailator.java）
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① 图片缩放/无缩放输出；
② 输出图片的格式有两种：文件所在目录 + 文件二进制流；
③ 转换图片格式（gif, png, jpg）；
④ 旋转图片；（正数：顺时针，负数：逆时针）
⑤ 按照坐标裁剪图片；
⑥ 对图片进行水印；
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@GitSuperDrew
GitSuperDrew committed Mar 2, 2021
1 parent 5920e9d commit 37d02ed
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6 changes: 6 additions & 0 deletions springboot-aop/pom.xml
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</properties>

<dependencies>
<!--图片处理类 google图片处理工具（非常好的图片开源工具）-->
<dependency>
<groupId>net.coobird</groupId>
<artifactId>thumbnailator</artifactId>
<version>0.4.8</version>
</dependency>
<!--barcode--><!-- pdf -->
<dependency>
<groupId>com.google.zxing</groupId>
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314 changes: 314 additions & 0 deletions springboot-aop/src/main/java/com/study/module/util/image/ThumbnailatorUtil.java
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package com.study.module.util.image;

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

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;

/**
* 一个非常好的图片处理类工具：thumbnailator
* <p>Thumbnailator是一个非常好的图片开源工具，可以很好的完成图片处理。
* 从API提供现有的图像文件和图像对象的缩略图中简化了缩略过程，两三行代码就能够从现有图片生成缩略图，
* 且允许微调缩略图生成，同时保持了需要写入到最低限度的代码量。同时还支持根据一个目录批量生成缩略图。
* </p>
*
* @author drew
* @date 2021/3/2 9:36
**/
public class ThumbnailatorUtil {

public static void main(String[] args) {
String output = "D:/" + UUID.randomUUID().toString().substring(0, 8).concat(".png");
// imgThumb("D:/logo.png", output, 20, 20);
ImgWatermark("D:/source_0.png", output, 300, 300, Positions.BOTTOM_RIGHT, "D:/logo.png",0.5f, 0.8f);
}

/**
* 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
*/
public static void imgThumb(String source, String output, int width, int height) {
try {
Thumbnails.of(source).size(width, height).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 指定大小进行缩放
*
* @param source 输入源
* @param output 输出源
* @param width 宽
* @param height 高
*/
public static void imgThumb(File source, String output, int width, int height) {
try {
Thumbnails.of(source).size(width, height).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 按照比例进行缩放
*
* @param source 输入源
* @param output 输出源
* @param scale 缩放比例
*/
public static void imgScale(String source, String output, double scale) {
try {
Thumbnails.of(source).scale(scale).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void imgScale(File source, String output, double scale) {
try {
Thumbnails.of(source).scale(scale).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 不按照比例，指定大小进行缩放
*
* @param source 输入源（文件路径，例如：D:/demo.jpg）
* @param output 输出源(输出文件所在的目录： D:/demo.jpg)
* @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) {
try {
Thumbnails.of(source).size(width, height).keepAspectRatio(keepAspectRatio).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void imgNoScale(File source, String output, int width, int height, boolean keepAspectRatio) {
try {
Thumbnails.of(source).size(width, height).keepAspectRatio(keepAspectRatio).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 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) {
try {
Thumbnails.of(source).size(width, height).rotate(rotate).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void imgRotate(File source, String output, int width, int height, double rotate) {
try {
Thumbnails.of(source).size(width, height).rotate(rotate).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 水印(对图片源文件进行图片水印)
*
* @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(例如：D:/output.png)
* @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) {
try {
Thumbnails.of(source).size(width, height).watermark(position, ImageIO.read(new File(watermark)), transparency).outputQuality(0.8f).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void ImgWatermark(File source, String output, int width, int height, Position position, String watermark, float transparency, float quality) {
try {
Thumbnails.of(source).size(width, height).watermark(position, ImageIO.read(new File(watermark)), transparency).outputQuality(0.8f).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 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) {
try {
Thumbnails.of(source).sourceRegion(position, x, y).size(width, height).keepAspectRatio(keepAspectRatio).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void imgSourceRegion(File source, String output, Position position, int x, int y, int width, int height, boolean keepAspectRatio) {
try {
Thumbnails.of(source).sourceRegion(position, x, y).size(width, height).keepAspectRatio(keepAspectRatio).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 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) {
try {
Thumbnails.of(source).sourceRegion(x, y, x1, y1).size(width, height).keepAspectRatio(keepAspectRatio).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void imgSourceRegion(File source, String output, int x, int y, int x1, int y1, int width, int height, boolean keepAspectRatio) {
try {
Thumbnails.of(source).sourceRegion(x, y, x1, y1).size(width, height).keepAspectRatio(keepAspectRatio).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 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) {
try {
Thumbnails.of(source).size(width, height).outputFormat(format).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

public static void imgFormat(File source, String output, int width, int height, String format) {
try {
Thumbnails.of(source).size(width, height).outputFormat(format).toFile(output);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 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) {
OutputStream os = null;
try {
os = new FileOutputStream(output);
Thumbnails.of(source).size(width, height).toOutputStream(os);
} catch (IOException e) {
e.printStackTrace();
}
return os;
}

public static OutputStream imgOutputStream(File source, String output, int width, int height) {
OutputStream os = null;
try {
os = new FileOutputStream(output);
Thumbnails.of(source).size(width, height).toOutputStream(os);
} catch (IOException e) {
e.printStackTrace();
}
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) {
BufferedImage buf = null;
try {
buf = Thumbnails.of(source).size(width, height).asBufferedImage();
ImageIO.write(buf, format, new File(output));
} catch (IOException e) {
e.printStackTrace();
}
return buf;
}

public static BufferedImage imgBufferedImage(File source, String output, int width, int height, String format) {
BufferedImage buf = null;
try {
buf = Thumbnails.of(source).size(width, height).asBufferedImage();
ImageIO.write(buf, format, new File(output));
} catch (IOException e) {
e.printStackTrace();
}
return buf;
}

}

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