java生成二维码，qrcode

通过barcode4j生成

@Controller
@RequestMapping("/bar/{code}")
public class BarCodeController {
	@RequestMapping(method = RequestMethod.GET)
	public void show(@PathVariable("code") String code,
			HttpServletRequest request, HttpServletResponse response)
			throws ConfigurationException, BarcodeException, IOException {
		DefaultConfiguration cfg = new DefaultConfiguration("barcode");
		DefaultConfiguration child = new DefaultConfiguration("datamatrix"); //code128
		DefaultConfiguration attr;
		//attr= new DefaultConfiguration("height");
		//attr.setValue("10");
		cfg.addChild(child);
		//child.addChild(attr);
		attr = new DefaultConfiguration("module-width");
		attr.setValue("0.6");
		child.addChild(attr);
		int orientation = 0;
		 int resolution = 300; 
		 
		BarcodeUtil util = BarcodeUtil.getInstance();
		BarcodeGenerator gen = util.createBarcodeGenerator(cfg);

		ByteArrayOutputStream bout = new ByteArrayOutputStream(4096);

		
		BitmapCanvasProvider bitmap = new BitmapCanvasProvider(bout,
				MimeTypes.MIME_JPEG, resolution, BufferedImage.TYPE_BYTE_BINARY,
				false, orientation);
		gen.generateBarcode(bitmap,code);
		try {
			bitmap.finish();
		} catch (IOException e) {
		} finally {
			try {
				bout.close();
			} catch (IOException e) {
			}
		}
		response.setContentType(MimeTypes.MIME_JPEG);
		response.setContentLength(bout.size());
		response.getOutputStream().write(bout.toByteArray());
		response.getOutputStream().flush();
	}
}

通过zxing生成

package gov.rsj.controller; 

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

/** 
 * @author fox 
 * @date 2012-3-22 下午3:12:33 
 * @version 1.0
 * @description QRCODE 条形码  需要javase.jar和core.jar两个包
 */
@Controller
@RequestMapping("/qrbar/{code}")
public class QrBarCodeController {
	@RequestMapping(method = RequestMethod.GET)
	public void show(@PathVariable("code") String code,
			HttpServletRequest request, HttpServletResponse response){
		QRCodeWriter writer = new QRCodeWriter();
		response.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-Control", "no-cache");
		response.setDateHeader("Expires", 0);
		response.setContentType("image/jpeg");
        BitMatrix bitMatrix = null;
        try {
            bitMatrix = writer.encode(code, BarcodeFormat.QR_CODE, 300, 300);
            MatrixToImageWriter.writeToStream(bitMatrix, "jpeg", response.getOutputStream());
            response.getOutputStream().flush();
            response.getOutputStream().close();
        } catch (WriterException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        
		
	}
}