Android版:
public byte[] getBitmapByte(Bitmap bitmap){ ByteArrayOutputStream out = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out); try { out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } return out.toByteArray(); } public Bitmap getBitmapFromByte(byte[] temp){ if(temp != null){ Bitmap bitmap = BitmapFactory.decodeByteArray(temp, 0, temp.length); return bitmap; }else{ return null; } } public static Bitmap drawableToBitmap(Drawable drawable){ int width = drawable.getIntrinsicWidth(); int height = drawable.getIntrinsicHeight(); Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565); Canvas canvas = new Canvas(bitmap); drawable.setBounds(0,0,width,height); drawable.draw(canvas); return bitmap; }
Java版
import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; public class TestImageBinary { static BASE64Encoder encoder = new sun.misc.BASE64Encoder(); static BASE64Decoder decoder = new sun.misc.BASE64Decoder(); public static void main(String[] args) { System.out.println(getImageBinary()); base64StringToImage(getImageBinary()); } static String getImageBinary(){ File f = new File("c://20090709442.jpg"); BufferedImage bi; try { bi = ImageIO.read(f); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write(bi, "jpg", baos); byte[] bytes = baos.toByteArray(); return encoder.encodeBuffer(bytes).trim(); } catch (IOException e) { e.printStackTrace(); } return null; } static void base64StringToImage(String base64String){ try { byte[] bytes1 = decoder.decodeBuffer(base64String); ByteArrayInputStream bais = new ByteArrayInputStream(bytes1); BufferedImage bi1 =ImageIO.read(bais); File w2 = new File("c://QQ.bmp");//可以是jpg,png,gif格式 ImageIO.write(bi1, "jpg", w2);//不管输出什么格式图片,此处不需改动 } catch (IOException e) { e.printStackTrace(); } } }