java生产条形码

准备：jbarcode-0.2.8.jar,下载地址：jbarcode-0.2.8.zip

jsp:

<img src="<%=basePath%>barcode/showBarCode" alt="" style="width: 200px; height: 150px;">

controller

1import java.io.BufferedOutputStream;
2import java.io.ByteArrayInputStream;
3import java.io.InputStream;
4
5import javax.servlet.http.HttpServletRequest;
6import javax.servlet.http.HttpServletResponse;
7
8import org.springframework.stereotype.Controller;
9import org.springframework.web.bind.annotation.RequestMapping;
10
11import util.OneBarcodeUtil;
12
13@Controller
14@RequestMapping("/barcode")
15public class BarcodeController {
16    @RequestMapping("/")
17    public String index(){
18        return "barcode";
19    }
20    @RequestMapping("/showBarCode")
21    public void showIMG(HttpServletRequest req,HttpServletResponse resp) throws Exception{
22        OneBarcodeUtil obu = new OneBarcodeUtil();
23        byte[] bs = obu.createBarcodeDefault("123123123");//这里是条码号
24         InputStream in = new ByteArrayInputStream(bs);// 业务逻辑取得图片的byte[]
25         BufferedOutputStream bout = new BufferedOutputStream(resp.getOutputStream()); 
26         //从输入流到输出流  
27        try {    
28          //  byte b[] = new byte[1024];    
29            int len = in.read(bs);    
30            while (len > 0) {    
31                bout.write(bs, 0, len);    
32                len = in.read(bs);    
33            }    
34        } catch (Exception e) {    
35            throw e;     
36        } finally {    
37            bout.close();    
38            in.close();    
39        }  
40    }
41}

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工具类

1import java.awt.image.BufferedImage;
2import java.io.IOException;
3import java.lang.reflect.Constructor;
4
5import org.jbarcode.JBarcode;
6import org.jbarcode.encode.BarcodeEncoder;
7import org.jbarcode.encode.Code39Encoder;
8import org.jbarcode.paint.BaseLineTextPainter;
9import org.jbarcode.paint.EAN13TextPainter;
10import org.jbarcode.paint.WideRatioCodedPainter;
11import org.jbarcode.paint.WidthCodedPainter;
12import org.jbarcode.util.ImageUtil;
13
14public class OneBarcodeUtil { 
15
16    
17       
18    /** 
19     * 生成一维码 
20     * @param value 值 
21     * @return 
22     */  
23    public static byte[] createBarcodeDefault(String value){  
24        return createBarcode(Code39Encoder.class,value,false);  
25    }  
26    
27    
28  //产生一维码图片  
29    public static byte[] createBarcode(Class<?> clazz,String value,boolean checkDigit){  
30          try{  
31              JBarcode localJBarcode = new JBarcode(getInstance(clazz),WidthCodedPainter.getInstance(),EAN13TextPainter.getInstance());    
32              localJBarcode.setPainter(WideRatioCodedPainter.getInstance());    
33              localJBarcode.setTextPainter(BaseLineTextPainter.getInstance());    
34              localJBarcode.setCheckDigit(checkDigit);  
35              localJBarcode.setShowCheckDigit(checkDigit);  
36              return getBytes(localJBarcode.createBarcode(value));    
37          }catch (Exception e) {  
38            e.printStackTrace();  
39            return null;  
40        }  
41    }  
42    
43    
44    //获取单例的对象  
45    private static BarcodeEncoder getInstance(Class<?> clazz) throws Exception{  
46        Constructor<?>[] constructors=clazz.getDeclaredConstructors();  
47        Constructor<?> privateConstructor = constructors[0];  
48        privateConstructor.setAccessible(true);  
49        return (BarcodeEncoder)privateConstructor.newInstance();  
50          
51    }  
52      
53    //获取图片字节码数组  
54    private static byte[] getBytes(BufferedImage paramBufferedImage) throws IOException{    
55          return ImageUtil.encode(paramBufferedImage,"jpeg", 96, 96);  
56    }    
57    
58    
59}

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 启动项目访问：http://localhost:8080/wxPublic/barcode/

生产条形码：