java 编写简单二维码demo（亲测可用）

简单生成二维码图片

反正可以用就 直接拿过来用了。。

忘了从哪里来了 好久前下载的 。。

package 域名12.二维码;

import 域名; 
import 域名table; 
import 域名域名odeFormat; 
import 域名域名deHintType; 
import 域名域名iFormatWriter; 
import 域名域名atrix; 

public class testQR {
	   
    /**
     * @param args
     * @throws Exception 
     */ 
    public static void main(String[] args) throws Exception { 
        String text = "http://域名"; 
        int width = 300; 
        int height = 300; 
        //二维码的图片格式 
        String format = "gif"; 
        Hashtable hints = new Hashtable(); 
        //内容所使用编码 
        域名(域名ACTER_SET, "utf-8"); 
        BitMatrix bitMatrix = new MultiFormatWriter().encode(text, 
                域名ODE, width, height, hints); 
        //生成二维码 
        File outputFile = new File("d:"+域名rator+"域名"); 
        域名eToFile(bitMatrix, format, outputFile); 
    } 
}

package 域名12.二维码;



import 域名域名atrix; 
import 域名eIO; 
import 域名; 
import 域名utStream; 
import 域名ception; 
import 域名域名eredImage;

public class QRUtil {
	
   private static final int BLACK = 0xFF000000; 
   private static final int WHITE = 0xFFFFFFFF; 
    
   private QRUtil() {} 
    
      
   public static BufferedImage toBufferedImage(BitMatrix matrix) { 
     int width = 域名idth(); 
     int height = 域名eight(); 
     BufferedImage image = new BufferedImage(width, height, 域名_INT_RGB); 
     for (int x = 0; x < width; x++) { 
       for (int y = 0; y < height; y++) { 
         域名GB(x, y, 域名(x, y) ? BLACK : WHITE); 
       } 
     } 
     return image; 
   } 
    
      
   public static void writeToFile(BitMatrix matrix, String format, File file) 
       throws IOException { 
     BufferedImage image = toBufferedImage(matrix); 
     if (!域名e(image, format, file)) { 
       throw new IOException("Could not write an image of format " + format + " to " + file); 
     } 
   } 
    
      
   public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) 
       throws IOException { 
     BufferedImage image = toBufferedImage(matrix); 
     if (!域名e(image, format, stream)) { 
       throw new IOException("Could not write an image of format " + format); 
     } 
   } 
}

jar 包 下载地址    http://域名/lib/域名