-------------引入JAR 包
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.xuanfeiyang.erp.util.BarCodeUtil;
public class BarCodeServlet extends HttpServlet{
private final static Logger logger = LoggerFactory.getLogger(BarCodeServlet.class);
private static final long serialVersionUID = -6703344493738422103L;
private static final String KEY = "keycode";
private static final String WIDTH = "mwidth";
private static final String HEIGHT = "mheight";
private final String CONTENT_TYPE = "image/png";
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setContentType(CONTENT_TYPE);
String keycode = req.getParameter(KEY);
int width=135;
int height=50;
if (keycode != null && !"".equals(keycode)) {
OutputStream stream = null;
try {
String mwidth = req.getParameter(WIDTH);
if (mwidth != null && !"".equals(mwidth.trim())) {
width=Integer.valueOf(mwidth);
}
String mheight = req.getParameter(HEIGHT);
if (mheight != null && !"".equals(mheight.trim())) {
height = Integer.valueOf(mheight);
}
stream = resp.getOutputStream();
BufferedImage img = BarCodeUtil.getBarcode(keycode, width, height);
ImageIO.write(img, "PNG", stream);
} catch (Exception e) {
logger.error("生成条形码图片出错", e);
} finally {
if (stream != null) {
stream.flush();
stream.close();
}
}
}
}
java 生成条形码 代码显示到页面
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转载自keney-oak.iteye.com/blog/2254653
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