将字节数组转换为图像（png）

Question

我有一个byte []，它是通过从某个表中获取数据而返回的。我想将这个字节数组转换为png图像。 注意：我没有像其他地方类似的例子中的图像字节数组。

 byte[] bytes = modelDashboardService.exportMyQueuePNG("pp83900","1");

InputStream in = new ByteArrayInputStream(bytes);

BufferedImage bImageFromConvert = ImageIO.read(in);//ImageIO.read(url);//

if(bImageFromConvert != null){
  ImageIO.write(bImageFromConvert, "png", new File(
  "D:/test1.png"));

}

My byte[] is not null but my BufferedImage is null .

请帮忙。

字节[]是： [37,80,68,70,45,49,46,55,10,37，-30，-29，-49，-45,10,51,32,48,32,111,98,106,10 ，60,60,47,76,101,110,103,116,104,32,52,57,50,47,70,105,108,116,101,114,47,70,108,97,116 ，101,68,101,99,111,100,101,62,62,115,116,114,101,97,109,10,120，-100，-115，-107,65,111，-29 ，32,16，-123，-17，-2,21,115，-20,30,66，-127,1，-116，-113，-39，-124，-83，-68,90， -59，-87,67，-38，-12，-76,90，-75,77，-91,85，-93，-86，-67，-12，-17，-17,24， - 127,55，-119,113，-99,67,34，-20，-9，-15,24,63,6，-101，-125，-128，-103,0,14，-70， -46，-12，-1,120,40，-34，-117，-17，-66，-96,107，-91，-63,63，-47,96，-90,120,55， 112，-66，-72,37，-115,51,11，-35,79，-64，-57,75,97,21，-109，-96，-71,6，-93，-104 ，-48,64，-32，-57,115，-79,63,101，-124，-78,12,117，-96,80,50,110,71,40，-53，-103， -62,64,9,73,19，-14,20,114，-53,74，-100,90,17,75，-55,108,53,69,41,44,25,87,83 ，-108，-26，-126，-119,73,4 7,109,52，-61,73,47,35,43，-90,39，-95,10，-103，-55,81,93，-8,18,126，-46，-122， -36，-48,12,13，-97，-7，-12,55,81,28，-119，-67，-105，-13,121,39,121,36，-24,94， -50,39，-100，-28，-111,104，-109,60，-110,105,47，-25，-61,76,114,62，-59,94，-51，-57 ，-73，-95，-8，-88，-85，-69,62，-25，-108，-77,53,93,114,40，-64,31，-118，-21,31 ，-126,34,0，-65,47，-82，-36，-50,45，-74，-66，-2，-26，-1，-98，-111,84,45， - 111,87，-51,10--4，-61，-38,117,58，-99，-122,35,63，-95,121,8,123，-32,88,47,51， -80，-107,33，-6,1，-68,104,86，-66,109,126，-63,124，-31，-21，-69，-38,63,12，-89 ，-94，-32,97,91,6,83,55,126，-34，-6，-29，-70,19,25,43,95，-50,125，-90,108,44 ，85，-40，-58，-127，-35,114，-21,78，-52,34，-9，-91，-103，-62,42,108，-6，-40,99 ，29,27,38,54,26，-34，-76，-51,118，-3，-69，-55,17，-68,12，-60，-3，-54，-75， -61,37,53，-57，-48,72，-105,44，-103，-40，-72，-92，-37，-47,78,55,57,79， 83，-122，-18，-69，-56,51，-78，-47，-77,117,119，-75，-69,119,57,34,62,70,102,61， - 125，-126，-27,58,39，-77,92,68，-113,67，-53，-8,85,58,28，-128，-117,12,35,27,29， -87，-119，-4,118,19,45，-33,51,47,28，-28，-35,113,58,20,88，-123，-63，-21，-1， -9,65,21，-107,82，-97,41，-15,6,41，-74,87,110,79，-21,53，-52,32,72,115,86， - 18，-6，-49，-53,51，-55,111，-5,84,15，-92,25，-99，-91,84，-12，-91，-126，-21， -35,94，-64，-14,13,78,12，-93,76,110，-40，-35，-96,47，-41,44,13，-56，-26,31， 113,64,107，-53,10,101,110,100,115,116,114,101,97,109,10,101,110,100,111,98,106,10,53,32,48 ，32,111,98,106,10,60,60,47,80,97,114,101,110,116,32,52,32,48,32,82,47,67,111,110,116 ，101,110,116,115,32,51,32,48,32,82,47,84,121,112,101,47,80,97,103,101,47,82,101,115,111 ，117,114,99,101,115,60,60,47,88,79,98,106,101,99,116,60,60,47,88,102,49,32,49,32,48 ， 32,82,62,62,47,70,111,110,116,60,60,47,70,49,32,50,32,48,32,82,62,62,62,62,47， 77,101,100,105,97,66,111,120,91,48,32,48,32,53,57,53,32,56,52,50,93,47,82,111,116， 97,116,101,32,57,48,62,62,10,101,110,100,111,98,106,10,50,32,48,32,111,98,106,10,60， 60,47,66,97,115,101,70,111,110,116,47,72,101,108,118,101,116,105,99,97,47,84,121,112,101， 47,70,111,110,116,47,69,110,99,111,100,105,110,103,47,87,105,110,65,110,115,105,69,110,99， 111,100,105,110,103,47,83,117,98,116,121,112,101,47,84,121,112,101,49,62,62,10,101,110,100， 111,98,106,10,49,32,48,32,111,98,106,10,60,60,47,84,121,112,101,47,88,79,98,106,101， 99,116,47,82,101,115,111,117,114,99,101,115,60,60,47,70,111,110,116,60,60,47,70,49,32， 50,32,48,32,82,62,62,62,62,47,83,117,98,116,121,112,101,47,70,111,114,109,47,66,66， 111,12 0,91,48,32,48,32,51,48,32,49,54,93,47,77,97,116,114,105,120,32,91,49,32,48,32， 48,32,49,32,48,32,48,93,47,76,101,110,103,116,104,32,52,52,47,70,111,114,109,84,121， 112,101,32,49,47,70,105,108,116,101,114,47,70,108,97,116,101,68,101,99,111,100,101,62,62， 115,116,114,101,97,109,10,120，-100,43，-28,114,10，-31,50,84,48,0,66,67,5,35,32,12 ，-55，-27，-46,119,51,84,48,4，-78，-46，-72,52,12,53,67，-78，-72,92,67，-72， 2，-71,0，-88,92,8,34,10,101,110,100,115,116,114,101,97,109,10,101,110,100,111,98,106， 10,52,32,48,32,111,98,106,10,60,60,47,84,121,112,101,47,80,97,103,101,115,47,67,111， 117,110,116,32,49,47,75,105,100,115,91,53,32,48,32,82,93,62,62,10,101,110,100,111,98， 106,10,54,32,48,32,111,98,106,10,60,60,47,84,121,112,101,47,67,97,116,97,108,111,103， 47,80,97,103,101,115,32,52,32,48， 32,82,62,62,10,101,110,100,111,98,106,10,55,32,48,32,111,98,106,10,60,60,47,80,114， 111,100,117,99,101,114,40,105,84,101,120,116，-82,32,53,46,53,46,53,32，-87,50,48,48， 48,45,50,48,49,52,32,105,84,101,120,116,32,71,114,111,117,112,32,78,86,32,92,40,65， 71,80,76,45,118,101,114,115,105,111,110,92,41,41,47,77,111,100,68,97,116,101,40,68,58， 50,48,49,54,48,51,50,51,49,54,51,54,53,55,43,48,53,39,51,48,39,41,47,67,114， 101,97,116,105,111,110,68,97,116,101,40,68,58,50,48,49,54,48,51,50,51,49,54,51,54， 53,55,43,48,53,39,51,48,39,41,62,62,10,101,110,100,111,98,106,10,120,114,101,102,10， 48,32,56,10,48,48,48,48,48,48,48,48,48,48,32,54,53,53,51,53,32,102,32,10,48， 48,48,48,48,48,48,56,48,54,32,48,48,48,48,48,32,110,32,10,48,48,48,48,48,48， 48,55,49,56,32,48,48,48,48,48,32,110 ，32,10,48,48,48,48,48,48,48,48,49,53,32,48,48,48,48,48,32,110,32,10,48,48,48 ，48,48,48,49,48,50,50,32,48,48,48,48,48,32,110,32,10,48,48,48,48,48,48,48,53 ，55,52,32,48,48,48,48,48,32,110,32,10,48,48,48,48,48,48,49,48,55,51,32,48,48 ，48,48,48,32,110,32,10,48,48,48,48,48,48,49,49,49,56,32,48,48,48,48,48,32,110 ，32,10,116,114,97,105,108,101,114,10,60,60,47,82,111,111,116,32,54,32,48,32,82,47,73 ，68,32,91,60,98,101,55,48,97,57,52,52,57,97,102,57,50,56,55,97,54,48,100,99,53 ，98,57,97,48,57,48,101,49,50,49,54,62,60,98,101,55,48,97,57,52,52,57,97,102,57 ，50,56,55,97,54,48,100,99,53,98,57,97,48,57,48,101,49,50,49,54,62,93,47,73,110 ，102,111,32,55,32,48,32,82,47,83,105,122,101,32,56,62,62,10,37,105,84,101,120,116,45 ，53,56,53,46,53,10,115,116,97,114,116,120,114,101,102 ，10,49,50,55,53,10,37,37,69,79,70,10]

Answer 1

尝试以下代码：

 private void saveImage(String path, final byte[] bytes) throws IOException {
        final File file = new File(path);
        final FileOutputStream fileOut = new FileOutputStream(file );
        fileOut.write(bytes);
        fileOut.flush();
        fileOut.close();
    }

Answer 2

根据ImageIO.read(InputStream input)的文件：

  

返回BufferedImage作为解码提供的InputStream的结果，其中ImageReader自动从当前注册的那些中选择InputStream。 ImageInputStream包含在ImageReader中。如果没有已注册的null声明能够阅读结果流，则会返回l1 = [1, 2, 3] l2 = l1 del l1[:] print(l2) 。

我最好的猜测是，您从表中检索的字节数组不是来自（有效）图像。

Answer 3

使用它：

File file = new File(getFilesDir()+"/file.png");
FileOutputStream fos = new FileOutputStream(file);

//write your byteArray here
fos.write(byteArray);
fos.flush();
fos.close();

请参阅此link