1、生成条形码的java后台代码如下,需要下载jbarcode-0.2.8.jar
package com.xxx;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jbarcode.JBarcode;
import org.jbarcode.encode.Code128Encoder;
import org.jbarcode.encode.Code39Encoder;
import org.jbarcode.encode.EAN13Encoder;
import org.jbarcode.encode.InvalidAtributeException;
import org.jbarcode.paint.BaseLineTextPainter;
import org.jbarcode.paint.EAN13TextPainter;
import org.jbarcode.paint.WideRatioCodedPainter;
import org.jbarcode.paint.WidthCodedPainter;
public class