本文提供将图片按照自定义尺寸进行裁剪的Java工具类,一如既往的实用主义。
<dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>30.1.1-jre</version> </dependency> <dependency> <groupId>org.bytedeco</groupId> <artifactId>javacv-platform</artifactId> <version>1.5.5</version> </dependency> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.5.2</version> </dependency> 复制代码
不废话,上代码。
package ai.guiji.csdn.tool; import cn.hutool.core.util.IdUtil; import com.google.common.base.Joiner; import com.google.common.base.Splitter; import org.bytedeco.javacpp.Loader; import java.io.File; import java.text.MessageFormat; import java.util.Arrays; import java.util.List; /** * @Program: csdn @ClassName: CutOutTool @Author: 剑客阿良_ALiang @Date: 2022-01-23 18:27 @Description: * 裁剪工具 @Version: V1.0 */ public class CutOutTool { /** * 图片裁剪 * * @param imagePath 图片地址 * @param outputDir 临时目录 * @param startX 裁剪起始x坐标 * @param startY 裁剪起始y坐标 * @param weight 裁剪宽度 * @param height 裁剪高度 * @throws Exception 异常 */ public static String cutOutImage( String imagePath, String outputDir, Integer startX, Integer startY, Integer weight, Integer height) throws Exception { List<String> paths = Splitter.on(".").splitToList(imagePath); String ext = paths.get(paths.size() - 1); if (!Arrays.asList("png", "jpg").contains(ext)) { throw new Exception("format error"); } String resultPath = Joiner.on(File.separator).join(Arrays.asList(outputDir, IdUtil.simpleUUID() + "." + ext)); String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class); ProcessBuilder builder = new ProcessBuilder( ffmpeg, "-i", imagePath, "-vf", MessageFormat.format( "crop={0}:{1}:{2}:{3}", String.valueOf(weight), String.valueOf(height), String.valueOf(startX), String.valueOf(startY)), "-y", resultPath); builder.inheritIO().start().waitFor(); return resultPath; } public static void main(String[] args) throws Exception { System.out.println( cutOutImage( "C:\\Users\\yi\\Desktop\\2054011.jpg", "C:\\Users\\yi\\Desktop\\", 0, 0, 1920, 2160)); } } 复制代码
代码说明:
1、cutOutImage方法参数分别为图片路径、输出临时目录、起始坐标x值、起始坐标y值、裁剪宽度、裁剪高度。
2、采用uuid作为临时输出唯一id,避免重复。
3、对文件后缀格式做了校验,可以按照需求自行调整。
4、裁剪尺寸不能超出图片限制,按照需求自行调整。
验证一下
准备的图片如下
执行结果
ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 10.2.0 (Rev5, Built by MSYS2 project) configuration: --prefix=.. --disable-iconv --disable-opencl --disable-sdl2 --disable-bzlib --disable-lzma --disable-linux-perf --enable-shared --enable-version3 --enable-runtime-cpudetect --enable-zlib --enable-libmp3lame --enable-libspeex --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-openssl --enable-libopenh264 --enable-libvpx --enable-libfreetype --enable-libopus --enable-cuda --enable-cuvid --enable-nvenc --enable-libmfx --enable-w32threads --enable-indev=dshow --target-os=mingw32 --cc='gcc -m64' --extra-cflags=-I../include/ --extra-ldflags=-L../lib/ --extra-libs='-static-libgcc -static-libstdc++ -Wl,-Bstatic -lstdc++ -lgcc_eh -lWs2_32 -lcrypt32 -lpthread -lz -lm -Wl,-Bdynamic -lole32 -luuid' libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 Input #0, image2, from 'C:\Users\yi\Desktop\2054011.jpg': Duration: 00:00:00.04, start: 0.000000, bitrate: 255438 kb/s Stream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 3840x2160, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native)) Press [q] to stop, [?] for help Output #0, image2, to 'C:\Users\yi\Desktop\\d1013fbee79e4380a01c574addf72afb.jpg': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: mjpeg, yuvj444p(pc), 1920x2160, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc58.91.100 mjpeg Side data: cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A frame= 1 fps=0.0 q=10.4 Lsize=N/A time=00:00:00.04 bitrate=N/A speed=0.201x video:234kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown C:\Users\yi\Desktop\\d1013fbee79e4380a01c574addf72afb.jpg Process finished with exit code 0 复制代码
结果图如下
OK,没什么问题。
没啥好总结的,还是提醒一下,需要注意图片的尺寸,裁剪的时候不能超出尺寸范围。
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我们赤着脚在自己的生命里行走,沿途无数的荆棘在等着你向前冲,它们在你的身上划出一道道伤口,让你痛,让你懂,教你怎样继续走。——《夏至未至》 复制代码
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