<span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px; background-color: rgb(255, 255, 255);">1、生成条形码的java后台代码如下,需要下载</span><a target=_blank target="_blank" href="http://download.csdn.net/detail/fzdswz/7985773" style="font-family: Arial; font-size: 14px; line-height: 26px; color: rgb(51, 102, 153); text-decoration: none; background-color: rgb(255, 255, 255);">jbarcode-0.2.8.jar</a>
- 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 BarCodeServlet extends HttpServlet {
- private static final long serialVersionUID = 1L;
- private JBarcode jBarcode;
- /**
- * 初始化条形码对象
- */
- public void init(ServletConfig conf) throws ServletException {
- super.init(conf);
- // 默认生成code39类型条形码
- jBarcode = new JBarcode(Code39Encoder.getInstance(),
- WideRatioCodedPainter.getInstance(),
- BaseLineTextPainter.getInstance());
- jBarcode.setShowText(true);// 显示图片下字符串内容
- jBarcode.setShowCheckDigit(true);// 显示字符串内容中是否显示检查码内容
- jBarcode.setCheckDigit(false);// 不生成检查码
- }
- public void doGet(HttpServletRequest req, HttpServletResponse resp)
- throws ServletException, IOException {
- resp.setContentType("image/gif");
- resp.setHeader("Pragma", "no-cache");
- resp.setHeader("Cache-Control", "no-cache");
- // 传入的参数,
- // 如果是判断条件,则用0,1表示,‘0’即无效或者不现实,‘1’即有效或者显示
- // 字符串参数
- String msg = req.getParameter("msg");
- // 是否显示图片下字符串内容
- String showText = req.getParameter("st");
- // 是否显示检查码内容
- String showCheckDigit = req.getParameter("scd");
- // 是否生成检查码
- String checkDigit = req.getParameter("cd");
- // 生成条形码类型
- String codeType = req.getParameter("codeType");
- //设置条形码barHeight
- String barH = req.getParameter("barH");
- //设置XDimension
- String barXD = req.getParameter("barXD");
- // 判断字符串内容
- if (msg == null)
- //msg = "788515004012";
- // 判断显示图片下字符串内容
- if ("0".equals(showText))
- jBarcode.setShowText(false);
- //判断barHeight
- if(barH != null && !barH.equals("")){
- double x = Double.valueOf(barH);
- jBarcode.setBarHeight(x);
- }
- if(barXD != null && !barXD.equals("")){
- try {
- //jBarcode.setWideRatio(10);
- jBarcode.setXDimension(Double.valueOf(barXD));
- } catch (InvalidAtributeException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }else{
- try {
- //jBarcode.setWideRatio(10);
- jBarcode.setXDimension(Double.valueOf(0.5));
- } catch (InvalidAtributeException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- // 判断显示检查码内容
- if ("1".equals(showCheckDigit))
- jBarcode.setShowText(true);
- // 判断生成检查码
- if ("1".equals(checkDigit))
- jBarcode.setShowText(true);
- // 判断生成条形码类型
- if(codeType != null && !"".equals(codeType)){
- if (codeType.equalsIgnoreCase("EAN13")) {
- // EAN13条形码基本属性,必要添加条件
- jBarcode.setEncoder(EAN13Encoder.getInstance());
- jBarcode.setPainter(WidthCodedPainter.getInstance());
- jBarcode.setTextPainter(EAN13TextPainter.getInstance());
- //必须需要以下属性
- jBarcode.setCheckDigit(true);
- } else if(codeType.equalsIgnoreCase("code128")){
- jBarcode.setEncoder(Code128Encoder.getInstance());
- jBarcode.setPainter(WidthCodedPainter.getInstance());
- jBarcode.setTextPainter(BaseLineTextPainter.getInstance());
- jBarcode.setCheckDigit(false);
- jBarcode.setShowCheckDigit(false);
- }else{
- // 这里设置 根据不同的条件设定生成的条形码基本属性,如EAN13。
- // 通过if...else...来判断即可
- // 默认生成的是Code39
- // 默认生成code39类型条形码
- }
- }
- // 生成条形码,并通过输出来展示在页面上
- try {
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- BufferedImage localBufferedImage = jBarcode.createBarcode(msg);
- ImageIO.write(localBufferedImage, "png", out);
- byte[] b = out.toByteArray();
- resp.getOutputStream().write(b);
- } catch (InvalidAtributeException e) {
- e.printStackTrace();
- }
- }
- public void doPost(HttpServletRequest req, HttpServletResponse resp)
- throws ServletException, IOException {
- try {
- doGet(req, resp);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
2、前台jsp显示代码:传递的参数可以自己设置,参考java后台代码jBarcode对象。
- <img style="vertical-align:middle;" src="<%=request.getContextPath()%>/BarCodeServlet?msg=${placeOrderNo}&barH=12.2&barXD=0.4&codeType=code128"/>
3、在web.xml配置java类:
- <servlet>
- <servlet-name>BarCodeServlet</servlet-name>
- <servlet-class>com.xxx.BarCodeServlet</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>BarCodeServlet</servlet-name>
- <url-pattern>/BarCodeServlet</url-pattern>
- </servlet-mapping>
注:对于jBarcode的参数设置可以看引用的包里面的org.jbarcode.demo的代码。支持多种格式的条形码生成。