import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
这两个包在编译期间无法通过,设置了forbidden reference(access rules) 为warning
但是编译还是没有办法通过,完整代码如下:
package com.demo.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class ImageUtil {
private static final char[] chars = { '0', '1', '2', '3', '4', '5', '6',
'7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I' };
private static final int SIZE = 4;
private static final int LINES = 20;
private static final int WIDTH = 100;
private static final int HEIGHT = 60;
private static final int FONT_SIZE = 40;
public static Map<String, BufferedImage> createImage() {
StringBuffer sb = new StringBuffer();
BufferedImage image = new BufferedImage(WIDTH, HEIGHT,
BufferedImage.TYPE_INT_BGR);
Graphics graphics = image.getGraphics();
graphics.setColor(Color.LIGHT_GRAY);
graphics.fillRect(0, 0, WIDTH, HEIGHT);
Random rm = new Random();
// 随机字符
for (int i = 1; i <= SIZE; i++) {
int r = rm.nextInt(chars.length);
graphics.setColor(getRandomColor());
graphics.setFont(new Font(null, Font.BOLD + Font.ITALIC, FONT_SIZE));
graphics.drawString(chars[r] + "", (i - 1) * WIDTH / SIZE,
HEIGHT / 2);
sb.append(chars[i]);
}
// 干扰线
for (int i = 1; i < LINES; i++) {
graphics.setColor(getRandomColor());
graphics.drawLine(rm.nextInt(WIDTH), rm.nextInt(HEIGHT),
rm.nextInt(WIDTH), rm.nextInt(HEIGHT));
}
Map<String, BufferedImage> map = new HashMap<String, BufferedImage>();
map.put(sb.toString(), image);
return map;
}
public static Color getRandomColor() {
Random rm = new Random();
Color color = new Color(rm.nextInt(256), rm.nextInt(256),
rm.nextInt(256));
return color;
}
public static InputStream getInputStream(BufferedImage image)
throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);
encoder.encode(image);
byte[] imageBts = bos.toByteArray();
InputStream in = new ByteArrayInputStream(imageBts);
return in;
}
}