条形码barcode4j的使用

1.去http://barcode4j.sourceforge.net/下载文件,(源代码和生成好的都要下载)

2.解压barcode4j-2.0alpha2-bin.zip这个包，在build目录下有barcode4j.jar，在lib目录下有avalon-framework-4.2.0.jar， 将barcode4j.jar和avalon-framework-4.2.0.jar添加到项目的lib中,eclipse中只要复制到web-inf下面的lib里面就OK了.

3.解压将barcode4j-2.0alpha2-src.zip，将srcjavaorgkrysalisbarcode4jservlet目录下的BarcodeServlet.java类的代码拷出来，修改默认的图片显示方式，找到        if (format == null) format = MimeTypes.MIME_JPEG;这一行,表示默认的格式为JPEG文件

4.将以下这段servlet配置在web.xml中
<servlet>
<servlet-name>BarcodeServlet</servlet-name>
<servlet-class>com.yourname.BarcodeServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>BarcodeServlet</servlet-name>
<url-pattern>/barcode</url-pattern>
</servlet-mapping>

5.在页面中添加<img src="<%=request.getContextPath() %>/barcode?msg=12345678" height="50px" width=130px/>

type是生成条形码的类型:

看例子就明白了

<table border="1">
   <tr>
   <td>
   <h1>code39</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=0123456789&type=code39" height="100px" width=300px/>
   </td>
   <td>
   <h1>code128</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=0123456789&type=code128" height="100px" width=300px/>
</td>
<td>
   <h1>Codabar</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=0123456789&type=codabar" height="100px" width=300px/>
</td>
</tr>
<tr>
<td>
<h1>intl2of5</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=01234567890540&type=intl2of5" height="100px" width=300px/>
</td>
<td>
<h1>upc-a</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=012345678912&type=upc-a" height="100px" width=300px/>
</td>
<td>
<h1>ean-13</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=200123457893&type=ean-13" height="100px" width=300px/>
</td>
<td>
<h1>ean-8</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=20123451&type=ean-8" height="100px" width=300px/>
</td>
</tr>

<tr>
<td>
<h1>postnet</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=01234567890540&type=postnet" height="100px" width=300px/>
</td>
<td>
<h1>royal-mail-cbc</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=012345AS678912&type=royal-mail-cbc" height="100px" width=300px/>
</td>
<td>
<h1>pdf417</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=200123457893&type=pdf417" height="100px" width=300px/>
</td>
<td>
<h1>datamatrix</h1>
   <img src="<%=request.getContextPath()%>/barcode?msg=20123451&type=datamatrix" height="100px" width=300px/>
</td>
</tr>
</table>