This servlet lets you produce QR codes for links. Internally servlet uses Google Charts API and caches data for the better performance.
How to use this servlet:
a) download qrcodePackage.jar and save it in WEB-INF/lib
b) describe this servlet in web.xml file. Servlet accepts the following initial parameters:
dir - Describes an existing directory on your server for the saved content
proxyHost - Optional parameter. Describes a proxy host for your internet connection
proxyPort - Optional parameter. Describes a proxy port for your internet connection
width - Optional parameter. Describes a width for the image. Default value is 300
height - Optional parameter. Describes a height for the image. Default value is 300
For example:
<servlet>
<servlet-name>QRCodeServlet</servlet-name>
<servlet-class>com.jsos.qr.QRCodeServlet</servlet-class>
<init-param>
<param-name>dir</param-name>
<param-value>/my_cache</param-value>
</init-param>
</servlet>
c) describe a mapping for this servlet in web.xml file. E.g.:
<servlet-mapping>
<servlet-name>QRCodeServlet</servlet-name>
<url-pattern>/servlet/qrcode</url-pattern>
</servlet-mapping>
and now in your applications you can use servlet in the following forms
/servlet/qrcode?your_url
e.g. /servlet/qrcode?http://www.servletsuite.com
and you will get the following image:
You can describe the proxy settings for the servlet itself.
Parameters are proxyHost and proxyPort. E.g.:
<servlet>
<servlet-name>QRCodeServlet</servlet-name>
<servlet-class>com.jsos.qr.QRCodeServlet</servlet-class>
<init-param>
<param-name>dir</param-name>
<param-value>/my_cache</param-value>
</init-param>
<init-param>
<param-name>proxyHost</param-name>
<param-value>192.168.0.1</param-value>
</init-param>
<init-param>
<param-name>proxyPort</param-name>
<param-value>8080</param-value>
</init-param>
</servlet>
For downloading:
QR code servlet: qrcodePackage.jar
See also JSOS - the largest collection of servlets and filters.