Java处理Webp图片格式转换的示例代码

dependencies {

   compile fileTree(dir:'src/main/resources/libs',include:['*.jar'])

}

< dependency >

   < groupId >com.github.nintha</ groupId >

   < artifactId >webp-imageio-core</ artifactId >

   < version >{versoin}</ version >

   < scope >system</ scope >

   < systemPath >${project.basedir}/libs/webp-imageio-core-{version}.jar</ systemPath >

</ dependency >

public static void main(String args[]) throws IOException {

   String inputPngPath = "test_pic/test.png" ;

   String inputJpgPath = "test_pic/test.jpg" ;

   String outputWebpPath = "test_pic/test_.webp" ;

   // Obtain an image to encode from somewhere

   BufferedImage image = ImageIO.read( new File(inputJpgPath));

   // Obtain a WebP ImageWriter instance

   ImageWriter writer = ImageIO.getImageWritersByMIMEType( "image/webp" ).next();

   // Configure encoding parameters

   WebPWriteParam writeParam = new WebPWriteParam(writer.getLocale());

   writeParam.setCompressionMode(WebPWriteParam.MODE_DEFAULT);

   // Configure the output on the ImageWriter

   writer.setOutput( new FileImageOutputStream( new File(outputWebpPath)));

   // Encode

   writer.write( null , new IIOImage(image, null , null ), writeParam);

}

public static void main(String args[]) throws IOException {

   String inputWebpPath = "test_pic/test.webp" ;

   String outputJpgPath = "test_pic/test_.jpg" ;

   String outputJpegPath = "test_pic/test_.jpeg" ;

   String outputPngPath = "test_pic/test_.png" ;

   // Obtain a WebP ImageReader instance

   ImageReader reader = ImageIO.getImageReadersByMIMEType( "image/webp" ).next();

   // Configure decoding parameters

   WebPReadParam readParam = new WebPReadParam();

   readParam.setBypassFiltering( true );

   // Configure the input on the ImageReader

   reader.setInput( new FileImageInputStream( new File(inputWebpPath)));

   // Decode the image

   BufferedImage image = reader.read( 0 , readParam);

   ImageIO.write(image, "png" , new File(outputPngPath));

   ImageIO.write(image, "jpg" , new File(outputJpgPath));

   ImageIO.write(image, "jpeg" , new File(outputJpegPath));

}