package com.luo.wctweb.util; 
 import java.awt.Color; 
 import java.awt.Font; 
 import java.awt.Graphics2D; 
 import java.awt.image.BufferedImage; 
 import java.io.ByteArrayOutputStream; 
 import java.io.File; 
 import java.util.Date; 
 import java.util.HashMap; 
 import java.util.Map; 
 import javax.imageio.ImageIO; 
 import javax.servlet.http.HttpServletRequest; 
 import com.google.zxing.BarcodeFormat; 
 import com.google.zxing.EncodeHintType; 
 import com.google.zxing.MultiFormatWriter; 
 import com.google.zxing.WriterException; 
 import com.google.zxing.common.BitMatrix; 
 import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; 
 import com.lz.lsf.util.Base64; 
 /** * @Description: (二維碼) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */ 
 public class ZXingCode { 
  private static final int QRCOLOR = 0xFF000000; //默認(rèn)是黑色 
  private static final int BGWHITE = 0xFFFFFFFF; //背景顏色 
  public static void main(String[] args) throws WriterException  
  {  
   try  
   {  
    getLogoQRCode("https://www.baidu.com/", null, "跳轉(zhuǎn)到百度的二維碼"); 
   }  
   catch (Exception e)  
   {  
    e.printStackTrace();  
   }  
  }  
  /** * 生成帶logo的二維碼圖片 * * @param qrPic * @param logoPic */ 
  public static String getLogoQRCode(String qrUrl,HttpServletRequest request,String productName) 
  { 
 // String filePath = request.getSession().getServletContext().getRealPath("/") + "resources/images/logoImages/llhlogo.png"; 
   //filePath是二維碼logo的路徑，但是實(shí)際中我們是放在項(xiàng)目的某個(gè)路徑下面的，所以路徑用上面的，把下面的注釋就好 
   String filePath = "C:/Users/luoguohui/Desktop/78310a55b319ebc4fa3aef658126cffc1f17168f.jpg"; //TODO  
   String content = qrUrl; 
   try 
   {  
    ZXingCode zp = new ZXingCode(); 
    BufferedImage bim = zp.getQR_CODEBufferedImage(content, BarcodeFormat.QR_CODE, 400, 400, zp.getDecodeHintType()); 
    return zp.addLogo_QRCode(bim, new File(filePath), new LogoConfig(), productName); 
   } 
   catch (Exception e) 
   { 
    e.printStackTrace(); 
   } 
   return null; 
  } 
  /** * 給二維碼圖片添加Logo * * @param qrPic * @param logoPic */ 
  public String addLogo_QRCode(BufferedImage bim, File logoPic, LogoConfig logoConfig, String productName) 
  { 
   try 
   { 
    /** * 讀取二維碼圖片，并構(gòu)建繪圖對(duì)象 */ 
    BufferedImage image = bim; 
    Graphics2D g = image.createGraphics(); 
    /** * 讀取Logo圖片 */ 
    BufferedImage logo = ImageIO.read(logoPic); 
    /** * 設(shè)置logo的大小,本人設(shè)置為二維碼圖片的20%,因?yàn)檫^(guò)大會(huì)蓋掉二維碼 */ 
    int widthLogo = logo.getWidth(null)>image.getWidth()*3/10?(image.getWidth()*3/10):logo.getWidth(null),  
     heightLogo = logo.getHeight(null)>image.getHeight()*3/10?(image.getHeight()*3/10):logo.getWidth(null); 
    /** * logo放在中心 */ 
    int x = (image.getWidth() - widthLogo) / 2; 
    int y = (image.getHeight() - heightLogo) / 2; 
    /** * logo放在右下角 * int x = (image.getWidth() - widthLogo); * int y = (image.getHeight() - heightLogo); */ 
    //開始繪制圖片 
    g.drawImage(logo, x, y, widthLogo, heightLogo, null); 
 // g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15); 
 // g.setStroke(new BasicStroke(logoConfig.getBorder())); 
 // g.setColor(logoConfig.getBorderColor()); 
 // g.drawRect(x, y, widthLogo, heightLogo); 
    g.dispose(); 
    //把商品名稱添加上去，商品名稱不要太長(zhǎng)哦，這里最多支持兩行。太長(zhǎng)就會(huì)自動(dòng)截取啦 
    if (productName != null && !productName.equals("")) { 
     //新的圖片，把帶logo的二維碼下面加上文字 
     BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR); 
     Graphics2D outg = outImage.createGraphics(); 
     //畫二維碼到新的面板 
     outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null); 
     //畫文字到新的面板 
     outg.setColor(Color.BLACK);  
     outg.setFont(new Font("宋體",Font.BOLD,30)); //字體、字型、字號(hào)  
     int strWidth = outg.getFontMetrics().stringWidth(productName); 
     if (strWidth > 399) { 
 // //長(zhǎng)度過(guò)長(zhǎng)就截取前面部分 
 // outg.drawString(productName, 0, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 5 ); //畫文字 
      //長(zhǎng)度過(guò)長(zhǎng)就換行 
      String productName1 = productName.substring(0, productName.length()/2); 
      String productName2 = productName.substring(productName.length()/2, productName.length()); 
      int strWidth1 = outg.getFontMetrics().stringWidth(productName1); 
      int strWidth2 = outg.getFontMetrics().stringWidth(productName2); 
      outg.drawString(productName1, 200 - strWidth1/2, image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); 
      BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR); 
      Graphics2D outg2 = outImage2.createGraphics(); 
      outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null); 
      outg2.setColor(Color.BLACK);  
      outg2.setFont(new Font("宋體",Font.BOLD,30)); //字體、字型、字號(hào)  
      outg2.drawString(productName2, 200 - strWidth2/2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight())/2 + 5 ); 
      outg2.dispose();  
      outImage2.flush(); 
      outImage = outImage2; 
     }else { 
      outg.drawString(productName, 200 - strWidth/2 , image.getHeight() + (outImage.getHeight() - image.getHeight())/2 + 12 ); //畫文字  
     } 
     outg.dispose();  
     outImage.flush(); 
     image = outImage; 
    } 
    logo.flush(); 
    image.flush(); 
    ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
    baos.flush(); 
    ImageIO.write(image, "png", baos); 
    //二維碼生成的路徑，但是實(shí)際項(xiàng)目中，我們是把這生成的二維碼顯示到界面上的，因此下面的折行代碼可以注釋掉 
    //可以看到這個(gè)方法最終返回的是這個(gè)二維碼的imageBase64字符串 
    //前端用 <img src="data:image/png;base64,${imageBase64QRCode}"/> 其中${imageBase64QRCode}對(duì)應(yīng)二維碼的imageBase64字符串 
    ImageIO.write(image, "png", new File("C:/Users/luoguohui/Desktop/TDC-" + new Date().getTime() + "test.png")); //TODO  
    String imageBase64QRCode = Base64.byteArrayToBase64(baos.toByteArray()); 
    baos.close(); 
    return imageBase64QRCode; 
   } 
   catch (Exception e) 
   { 
    e.printStackTrace(); 
   } 
   return null; 
  } 
  /** * 構(gòu)建初始化二維碼 * * @param bm * @return */ 
  public BufferedImage fileToBufferedImage(BitMatrix bm) 
  { 
   BufferedImage image = null; 
   try 
   { 
    int w = bm.getWidth(), h = bm.getHeight(); 
    image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); 
    for (int x = 0; x < w; x++) 
    { 
     for (int y = 0; y < h; y++) 
     { 
      image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE); 
     } 
    } 
   } 
   catch (Exception e) 
   { 
    e.printStackTrace(); 
   } 
   return image; 
  } 
  /** * 生成二維碼bufferedImage圖片 * * @param content * 編碼內(nèi)容 * @param barcodeFormat * 編碼類型 * @param width * 圖片寬度 * @param height * 圖片高度 * @param hints * 設(shè)置參數(shù) * @return */ 
  public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints) 
  { 
   MultiFormatWriter multiFormatWriter = null; 
   BitMatrix bm = null; 
   BufferedImage image = null; 
   try 
   { 
    multiFormatWriter = new MultiFormatWriter(); 
    // 參數(shù)順序分別為：編碼內(nèi)容，編碼類型，生成圖片寬度，生成圖片高度，設(shè)置參數(shù) 
    bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints); 
    int w = bm.getWidth(); 
    int h = bm.getHeight(); 
    image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); 
    // 開始利用二維碼數(shù)據(jù)創(chuàng)建Bitmap圖片，分別設(shè)為黑（0xFFFFFFFF）白（0xFF000000）兩色 
    for (int x = 0; x < w; x++) 
    { 
     for (int y = 0; y < h; y++) 
     { 
      image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE); 
     } 
    } 
   } 
   catch (WriterException e) 
   { 
    e.printStackTrace(); 
   } 
   return image; 
  } 
  /** * 設(shè)置二維碼的格式參數(shù) * * @return */ 
  public Map<EncodeHintType, Object> getDecodeHintType() 
  { 
   // 用于設(shè)置QR二維碼參數(shù) 
   Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(); 
   // 設(shè)置QR二維碼的糾錯(cuò)級(jí)別（H為最高級(jí)別）具體級(jí)別信息 
   hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); 
   // 設(shè)置編碼方式 
   hints.put(EncodeHintType.CHARACTER_SET, "utf-8"); 
   hints.put(EncodeHintType.MARGIN, 0); 
   hints.put(EncodeHintType.MAX_SIZE, 350); 
   hints.put(EncodeHintType.MIN_SIZE, 100); 
   return hints; 
  } 
 } 
  class LogoConfig 
  { 
   // logo默認(rèn)邊框顏色 
   public static final Color DEFAULT_BORDERCOLOR = Color.WHITE; 
   // logo默認(rèn)邊框?qū)挾?
   public static final int DEFAULT_BORDER = 2; 
   // logo大小默認(rèn)為照片的1/5 
   public static final int DEFAULT_LOGOPART = 5; 
   private final int border = DEFAULT_BORDER; 
   private final Color borderColor; 
   private final int logoPart; 
   /** * Creates a default config with on color {@link #BLACK} and off color * {@link #WHITE}, generating normal black-on-white barcodes. */ 
   public LogoConfig() 
   { 
    this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART); 
   } 
   public LogoConfig(Color borderColor, int logoPart) 
   { 
    this.borderColor = borderColor; 
    this.logoPart = logoPart; 
   } 
   public Color getBorderColor() 
   { 
    return borderColor; 
   } 
   public int getBorder() 
   { 
    return border; 
   } 
   public int getLogoPart() 
   { 
    return logoPart; 
   } 
  }