java读取图片

Java code:

import java.awt.image.*;
import java.awt.*;
import java.io.*;
import javax.imageio.*;

public class ImageByte {

/**
* 转换Image数据为byte数组
*
* @param image
* Image对象
* @param format
* image格式字符串.如"jpeg","png"
* @return byte数组
*/
public static byte[] imageToBytes(BufferedImage image, String format) {
BufferedImage bImage = new BufferedImage(image.getWidth(null), image
.getHeight(null), BufferedImage.TYPE_INT_ARGB);
Graphics bg = bImage.getGraphics();
bg.drawImage(image, 0, 0, null);
bg.dispose();

ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
ImageIO.write(bImage, format, out);
} catch (IOException e) {
e.printStackTrace();
// Log.log(null,"imageToBytes(): " e);
}
return out.toByteArray();
}

/**
* 转换byte数组为Image
*
* @param bytes
* Image的bytes数据数组
* @param filename
* 为要生成新的文件名
* @return boolean
*/
public static boolean ByteToImage(byte[] b, String filename) {
boolean bl = false;
File binaryFile = new File("e:\\test\\" + filename + ".