Thumbnails本地文件壓縮及MultipartFile類型文件壓縮后轉MultipartFile

本地文件壓縮

1.添加pom依賴

      <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.9</version>
      </dependency>

2.代碼
Thumbnails.of("壓縮前路徑").scale(0.25f).toFile("壓縮后路徑");

MultipartFile類型文件壓縮后轉MultipartFile

1.添加pom依賴

      <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.9</version>
      </dependency>

2.代碼 MultipartFile file

ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
Thumbnails.of(file.getInputStream())
                            .scale(0.9f)
                            .toOutputStream(outputStream);
byte[] bytes = outputStream.toByteArray();
                InputStream inputStream = new ByteArrayInputStream(bytes);
                MultipartFile mfileInfos = new MockMultipartFile(file.getOriginalFilename(), file.getOriginalFilename(), file.getContentType(), inputStream);