Java将GIF图像转换为PNG格式 [英] Java convert GIF image to PNG format

问题描述

我必须构建一个Java Servlet，该Java Servlet接收图像并将返回的图像转换为PNG格式.我怎样才能做到这一点? 通过转换，我并不意味着更改文件扩展名，如某些示例所示.

I have to build a Java servlet that receives an image and returns that image converted to PNG format. How can I achieve this? By converting I don't mean changing the file extension, like some examples suggest.

提前谢谢！

推荐答案

尝试一下:

package demo;

import javax.imageio.ImageIO;
import java.io.File;
import java.io.IOException;

public class Main {
    public static void main( String [] args ) throws IOException { 
        File input = new File("input.gif");
        File output = new File("output.png");

        ImageIO.write( ImageIO.read( input ), "png", ouput);
    }
}

阅读 ImageIO .

当然，您可能希望改为从流中读取和写入.

Of course, you may want to read and write from an stream instead.

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