base圖片保存到sqlserver,讀取出來不一樣的問題

把 data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABAMAAAJBCAYAAAAz/nxzAAAgAElEQVR4nOy9WYwkS3ffd+/9vvt9JE2KiyhaAk3ZkGmKsGXTkgzBEC1YBi0DJgRKEAwK9ItAiA8G........QAQRAEQRAEQRAEQegz/j/448aEK/0qmQAAAABJRU5ErkJggg== 這樣的base64String圖片

使用byte[] b = org.ajax4jsf.util.base64.Base64.decodeBase64((signedBase64Customerdisk).getBytes("UTF-8"));存儲到sqlserver的image type的欄位,

讀取的時候 byte[] b = org.apache.commons.codec.binary.Base64.encodeBase64(imageBinary);

打印 : System.out.println("get form db :"+new String(org.ajax4jsf.util.base64.Base64.encodeBase64(imageBinary),"UTF-8"));

發現這段字串末尾部分變成了 data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABAMAAAJBCAYAAAAz/nxzAAAgAElEQVR4nOy9WYwkS3ffd+/9vvt9JE2KiyhaAk3ZkGmKsGXTkgzBEC1YBi0DJgRKEAwK9ItAiA8G........QAQRAEQRAEQRAEQegz/j/448aEK/0qmQAAAABJRU5ErkJgAAA= 

百思不得其解

后在存儲的時候

public byte[] imageDataToByte(String imageData) throws IOException {
		
	    byte[] imgByteArray = org.ajax4jsf.util.base64.Base64.decodeBase64(imageData.getBytes());
	    InputStream in = new ByteArrayInputStream(imgByteArray);
		
	    ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
	    int ch;
	    while ((ch = in.read()) != -1)
	    {
	       bytestream.write(ch);
	    }
	    byte imgdata[]=bytestream.toByteArray();
	    bytestream.close();
	    return imgdata;
}

使用改方法把base64的String進行轉換為byte后問題解決~~