图片和base64
http://ben-bai.blogspot.jp/2012/08/java-convert-image-to-base64-string-and.html
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Java代码 package test; import java.io.IOException; import sun.misc.BASE64Encoder; import sun.misc.BASE64Decoder; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.awt.image.BufferedImage; import javax.imageio.ImageIO; public class ImageUtils { /** * Decode string to image * @param imageString The string to decode * @return decoded image */ public static BufferedImage decodeToImage(String imageString) { BufferedImage image = null; byte[] imageByte; try { BASE64Decoder decoder = new BASE64Decoder(); imageByte = decoder.decodeBuffer(imageString); ByteArrayInputStream bis = new ByteArrayInputStream(imageByte); image = ImageIO.read(bis); bis.close(); } catch (Exception e) { e.printStackTrace(); } return image; } /** * Encode image to string * @param image The image to encode * @param type jpeg, bmp, ... * @return encoded string */ public static String encodeToString(BufferedImage image, String type) { String imageString = null; ByteArrayOutputStream bos = new ByteArrayOutputStream(); try { ImageIO.write(image, type, bos); byte[] imageBytes = bos.toByteArray(); BASE64Encoder encoder = new BASE64Encoder(); imageString = encoder.encode(imageBytes); bos.close(); } catch (IOException e) { e.printStackTrace(); } return imageString; } public static void main (String args[]) throws IOException { /* Test image to string and string to image start */ BufferedImage img = ImageIO.read(new File("files/img/TestImage.png")); BufferedImage newImg; String imgstr; imgstr = encodeToString(img, "png"); System.out.println(imgstr); newImg = decodeToImage(imgstr); ImageIO.write(newImg, "png", new File("files/img/CopyOfTestImage.png")); /* Test image to string and string to image finish */ } } |
