| BarcodeServlet | 
Barcode generator servlet
 A servlet that creates PNG image of a barcode
 according to the parameters sent to a the servlet
 
 Mandatory HTTP parameters:
 
 barcodeType
 barcodeValue
 barcodeType
 
 
 Parameter Values:
 
 barcodeType: CODE128, CODE93 or INTERLEAVED2OF5
 barcodeValue: Any text if code128 or code93, any integer number if interleaved2of5
 sizeY: height in pixels of the image(default value: 50)
 rotation: angle to rotate the image: 0,90,180 or 270
 barColor:color of the bars: black,green, etc
 textColor:color of the text: black,green, etc
 showText: Show the text true/false
 transparent: Use transparent background true/false
 alignment: Text alignment: CENTER, LEFT or RIGHT
 fontName: anme of the font, for example Helvetica
 fontSize:Font size
 fontStyle: Font style: BOLD, ITALIC or PLAIN
 
 A very basic form to post data to generate a barcode
 
      <form method="POST" action="/JBars/BarcodeServlet">
        Barcode Type
        <input type="text" name="barcodeType" >
        <br>
        Text to encode:
        <input type="text" name="barcodeValue" >
        <br>
        Size Y(in pixels):
        <input type="text" name="sizeY" >
        <br>
        Rotation:
        <input type="text" name="rotation" >
        <br>
        Bar Color:
        <input type="text" name="barColor" >
        <br>
        showText:
        <input type="text" name="showText" >
        <br>
        fontName:
        <input type="text" name="fontName" >
        <br>
        fontSize:
        <input type="text" name="fontSize" >
        <br>
        fontStyle:
        <input type="text" name="fontStyle" >
        <br>
        transparent:
        <input type="text" name="transparent" >
        <br>
        alignment:
        <input type="text" name="alignment" >
        <br>
        <input type="submit" value="Generator Barcode">
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