Java生成二维码可添加logo和文字功能

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: (二维码) * @author：luoguohui * @date：2015-10-29 下午05:27:13 */ 
 public class zxingcode { 
  private static final int qrcolor = 0xff000000; //默认是黑色 
  private static final int bgwhite = 0xffffffff; //背景颜色 
  public static void main(string[] args) throws writerexception  
  {  
   try  
   {  
    getlogoqrcode("https://www.baidu.com/", null, "跳转到百度的二维码"); 
   }  
   catch (exception e)  
   {  
    e.printstacktrace();  
   }  
  }  
  /** * 生成带logo的二维码图片 * * @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是二维码logo的路径，但是实际中我们是放在项目的某个路径下面的，所以路径用上面的，把下面的注释就好 
   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; 
  } 
  /** * 给二维码图片添加logo * * @param qrpic * @param logopic */ 
  public string addlogo_qrcode(bufferedimage bim, file logopic, logoconfig logoconfig, string productname) 
  { 
   try 
   { 
    /** * 读取二维码图片，并构建绘图对象 */ 
    bufferedimage image = bim; 
    graphics2d g = image.creategraphics(); 
    /** * 读取logo图片 */ 
    bufferedimage logo = imageio.read(logopic); 
    /** * 设置logo的大小,本人设置为二维码图片的20%,因为过大会盖掉二维码 */ 
    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); */ 
    //开始绘制图片 
    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(); 
    //把商品名称添加上去，商品名称不要太长哦，这里最多支持两行。太长就会自动截取啦 
    if (productname != null && !productname.equals("")) { 
     //新的图片，把带logo的二维码下面加上文字 
     bufferedimage outimage = new bufferedimage(400, 445, bufferedimage.type_4byte_abgr); 
     graphics2d outg = outimage.creategraphics(); 
     //画二维码到新的面板 
     outg.drawimage(image, 0, 0, image.getwidth(), image.getheight(), null); 
     //画文字到新的面板 
     outg.setcolor(color.black);  
     outg.setfont(new font("宋体",font.bold,30)); //字体、字型、字号  
     int strwidth = outg.getfontmetrics().stringwidth(productname); 
     if (strwidth > 399) { 
 // //长度过长就截取前面部分 
 // outg.drawstring(productname, 0, image.getheight() + (outimage.getheight() - image.getheight())/2 + 5 ); //画文字 
      //长度过长就换行 
      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("宋体",font.bold,30)); //字体、字型、字号  
      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 ); //画文字  
     } 
     outg.dispose();  
     outimage.flush(); 
     image = outimage; 
    } 
    logo.flush(); 
    image.flush(); 
    bytearrayoutputstream baos = new bytearrayoutputstream(); 
    baos.flush(); 
    imageio.write(image, "png", baos); 
    //二维码生成的路径，但是实际项目中，我们是把这生成的二维码显示到界面上的，因此下面的折行代码可以注释掉 
    //可以看到这个方法最终返回的是这个二维码的imagebase64字符串 
    //前端用 <img src="data:image/png;base64,${imagebase64qrcode}"/> 其中${imagebase64qrcode}对应二维码的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; 
  } 
  /** * 构建初始化二维码 * * @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; 
  } 
  /** * 生成二维码bufferedimage图片 * * @param content * 编码内容 * @param barcodeformat * 编码类型 * @param width * 图片宽度 * @param height * 图片高度 * @param hints * 设置参数 * @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(); 
    // 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数 
    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); 
    // 开始利用二维码数据创建bitmap图片，分别设为黑（0xffffffff）白（0xff000000）两色 
    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; 
  } 
  /** * 设置二维码的格式参数 * * @return */ 
  public map<encodehinttype, object> getdecodehinttype() 
  { 
   // 用于设置qr二维码参数 
   map<encodehinttype, object> hints = new hashmap<encodehinttype, object>(); 
   // 设置qr二维码的纠错级别（h为最高级别）具体级别信息 
   hints.put(encodehinttype.error_correction, errorcorrectionlevel.h); 
   // 设置编码方式 
   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默认边框颜色 
   public static final color default_bordercolor = color.white; 
   // logo默认边框宽度 
   public static final int default_border = 2; 
   // logo大小默认为照片的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; 
   } 
  }