Java Postnet Generator
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numeric data 0-9. 5, 6, 9, 11digits length only The structure of a Postnet: |
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1. Generate Postnet in Java class with the changing of barcode properties.
// Create Java POSTNET object
Postnet barcode = new Postnet();
// Set POSTNET data text to encode
barcode.setData("987654321");
// Generate POSTNET barcode & print into Graphics2D object
//barcode.drawBarcode("Java Graphics2D object");
// Generate POSTNET barcode & encode into GIF format
barcode.drawBarcode("C://barcode-postnet.gif");
// Generate POSTNET barcode & encode into JPEG format
barcode.drawBarcode("C://barcode-postnet.jpg");
2. Generate & encode Postnet to EPS with changing the values concerned.
// Create Java Postnet object
Postnet barcode = new Postnet();
// Set Postnet data text to encode
barcode.setData("987654321");
// Generate Postnet barcode & encode into EPS
barcode.drawBarcode2EPS("C://barcode-postnet.eps");
3. Generate & encode Postnet in html or jsp pages.
1. Copy barcode folder and its contents from demo package to Apache Tomcat.
2. Start Apache Tomcat, go to http://YourDomain:Port/barcode/barcode?DATA=987654321&TYPE=postnet
3. Insert an image tag (img) into your page. For example,
<imgsrc="http://YourDomain:Port/barcode/barcode?DATA=987654321&TYPE=postnet" />
4. Two ways to set the width and height of generated barcode Postnet image.
1. Set the values of the barcodeWidth and barcodeHeight properties.Postnet Basic Settings
Properties | Value |
Comments
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Property | URL | Options | Default | |
data | DATA | (Data to encode in the Codabar) | "" | Postnet value to encode Postnet Character Set:
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addCheckSum | ADD-CHECK-SUM | (Data to encode in the Codabar) | false | addCheckSum property is not applied here. Java Barcode will automatically add one checksum character. |
Postnet Special Settings
Properties | Value | Comments |
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Property | URL | Options | Default | |
ShortTallRatio |
SHORT-TALL-RATIO |
float |
0.4of | Short bar vs tall bar (Y) ratio |
Postnet Text Settings
Properties | Value | Comments |
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Property | URL | Options | Default | |
showText
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SHOW-TEXT |
true or false |
true |
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textColor
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TEXT-COLOR |
Color |
black | Color of the shown text |
textFont
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TEXT-FONT
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Font |
new Font("Arial",Font.PLAIN,11) | The font, font style and font size of the text |
textMargin
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TEXT-MARGIN
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float |
6 | The space between the text and the barcode symbol |
Postnet Size Settings
Properties | Value | Comments |
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Property | URL | Options | Default | |
rotate
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ROTATE |
Degree0, 90, 180, 270 |
0 (Barcode.ROTATE) | Rotate the Angle of the Codabar images |
autoResize
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AUTO-RESIZE |
true or false |
false | Auto resize the generated barcode image |
barcodeHeight |
BARCODE-HEIGHT |
float |
0 | Barcode image Height |
barcodeWidth |
BARCODE-WIDTH |
float |
0 | Barcode image Width |
bottomMargin |
BOTTOM-MARGIN |
float |
0 | Barcode image bottom margin size |
leftMargin | LEFT-MARGINE | float | 0 | Barcode image left margin size |
rightMargin | RIGHT-MARGIN | float | 0 | Barcode image right margin size. |
topMargin | TOP-MARGIN | float | 0 | Barcode image Top margin size |
barAlignment | BARALIGMENT | int | 1(center) | Barcode horizontal alignment inside the image. 0: left, 1: center, 2: right. |
uom |
UOM |
Pixel, Cm, or Inch |
0(Pixel) | Unit of Measure for all numeric properties.Valid values: 0: pixel; 1: inch; 2: cm. |
X | X | float | 1 | Width of barcode bar module (narrow bar), default is 1 pixel |
Y | Y | float | 30 | Height of barcode bar module, default is 30 pixel |
Postnet Color Settings
Properties | Value | Comments |
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Property | URL | Options | Default | |
backColor |
BACK -COLOR |
Color |
white | Barcode image background color |
foreColor |
FORE -COLOR |
Color |
black | Barcode image foreground color |
Postnet Image Settings
Properties | Value | Comments |
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Property | URL | Options | Default | |
resolution |
RESOLUTION |
int |
72 | Resolution of Codabar Image, Dots Per Inch |
Method
// generate barcode and output to OutputStream object
public boolean drawBarcode(OutputStream outputStream) throws Exception// generate barcode into a new BufferedImage object
public BufferedImage drawBarcode() throws Exception/*
Use this method to generate barcode, and save into gif or jpeg files
1. to save into gif file, filename ends with ".gif", like "c:\\barcode.gif"
2. to save into jpeg file, filename ends with ".jpg", like "c:\\barcode.jpg"
*/
public byte[] drawBarcodeToBytes() throws Exceptionpublic boolean drawBarcode(String imageFile) throws Exception
// Generate barcode and save into EPS file, the filename must ends with ".eps"
public void drawBarcode2EPS(String filename) throws Exception// Generate barcode on Graphics2D object within certain area
public void drawBarcode(Graphics2D g, Rectangle2D rectangle) throws Exception