webp转成png、jpg、jpeg(亲测可用，无需安装动态链接库)

柔情只为你懂 2022-01-28 08:59 479阅读 0赞

Webp是Google推出的一种新型图片格式，相比于 传统的PNG/JPG图片有着更小体积的优势，在Web中有着广泛的应用。由于Webp格式推出比较晚， Jdk 内置的图片编解码库对此并不支持。

网上给出的Java环境解决方案往往需要手动在java.library.path中安装对应的动态链接库，windows是dll文件，linux是so文件。这对于开发部署非常不方便。

本文提供一种无需手动安装动态链接库，同时可以方便处理Webp的解决方案

项目git链接https://github.com/nintha/webp-imageio-core

webp-imageio-core.jar包  
链接：[https://pan.baidu.com/s/1xfB2OrbvAFnEk\_FNWE36rw][https_pan.baidu.com_s_1xfB2OrbvAFnEk_FNWE36rw]  
提取码：akzp

在项目中导入webp-imageio-core.jar包

webp编码

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);
    }

webp解码

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));
    
    }

原文章：[https://segmentfault.com/a/1190000016324137][https_segmentfault.com_a_1190000016324137]

[https_pan.baidu.com_s_1xfB2OrbvAFnEk_FNWE36rw]: https://pan.baidu.com/s/1xfB2OrbvAFnEk_FNWE36rw
[https_segmentfault.com_a_1190000016324137]: https://segmentfault.com/a/1190000016324137