下面通过代码给大家介绍Java gif图片转换为jpg格式,具体代码如下所示:
if(fileName.toLowerCase().endsWith(".gif")){//由于头像上传支持JPG、JPEG、BMP、GIF、PNG格式图片.而商汤人脸设备仅支持JPG、JPEG、BMP、PNG,故如图片为GIF格式需要转换
fileParams.put("avatarFile", api.GifToJpg(avatar_file));
}else{
fileParams.put("avatarFile", api.getBytes(avatar_file));
}
/**
* 将文件转换为byte二进制流
* @param f
* @return
*/
public static byte[] getBytes(File f) {
try {
InputStream in = new FileInputStream(f);
ByteArrayOutputStream out = new ByteArrayOutputStream(1024);
byte[] b = new byte[1024];
int n;
while ((n = in.read(b)) != -1)
out.write(b, 0, n);
in.close();
out.close();
return out.toByteArray();
} catch (IOException e) {
logger.error("***请设置文件路径***");
e.printStackTrace();
}
return null;
}
/**
* 将gif格式图片转换为jpg格式文件,并直接返回byte二进制流
* @param file
* @return
*/
public static byte[] GifToJpg(File file){
BufferedImage bufferedImage;
ByteArrayOutputStream out = new ByteArrayOutputStream(1024);
try {
// read image file
bufferedImage = ImageIO.read(file);
// create a blank, RGB, same width and height, and a white
BufferedImage newBufferedImage = new BufferedImage(
bufferedImage.getWidth(), bufferedImage.getHeight(),
BufferedImage.TYPE_INT_RGB);
// TYPE_INT_RGB:创建一个RBG图像,24位深度,成功将32位图转化成24位
newBufferedImage.createGraphics().drawImage(bufferedImage, 0, 0,Color.WHITE, null);
// write to jpeg file
ImageIO.write(newBufferedImage, "jpg",out);//转换输出到二进制数组流
//ImageIO.write(newBufferedImage, "jpg",new File("c:\\java.jpg"));//转换输出到文件
return out.toByteArray();//二进制流
} catch (IOException e) {
logger.error("***GifToJpg方法报错***");
e.printStackTrace();
}
return null;
}
知识点扩展:
用java将png图片转换成jpg格式的图片
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class ConvertImageFile {
public static void main(String[] args) {
BufferedImage bufferedImage;
try {
//read image file
bufferedImage = ImageIO.read(new File("c:\\java.png"));
// create a blank, RGB, same width and height, and a white background
BufferedImage newBufferedImage = new BufferedImage(bufferedImage.getWidth(),
bufferedImage.getHeight(), BufferedImage.TYPE_INT_RGB);
//TYPE_INT_RGB:创建一个RBG图像,24位深度,成功将32位图转化成24位
newBufferedImage.createGraphics().drawImage(bufferedImage, 0, 0, Color.WHITE, null);
// write to jpeg file
ImageIO.write(newBufferedImage, "jpg", new File("c:\\java.jpg"));
System.out.println("Done");
} catch (IOException e) {
e.printStackTrace();
}
}
}
总结
以上所述是小编给大家介绍的Java gif图片转换为jpg格式,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持!
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