📄 barcodeean.java
字号:
}
/** Creates the bars for the barcode supplemental 2.
* @param _code the text with 2 digits
* @return the barcode
*/
public static byte[] getBarsSupplemental2(String _code) {
int code[] = new int[2];
for (int k = 0; k < code.length; ++k)
code[k] = _code.charAt(k) - '0';
byte bars[] = new byte[TOTALBARS_SUPP2];
int pb = 0;
int parity = (code[0] * 10 + code[1]) % 4;
bars[pb++] = 1;
bars[pb++] = 1;
bars[pb++] = 2;
byte sequence[] = PARITY2[parity];
for (int k = 0; k < sequence.length; ++k) {
if (k == 1) {
bars[pb++] = 1;
bars[pb++] = 1;
}
int c = code[k];
byte stripes[] = BARS[c];
if (sequence[k] == ODD) {
bars[pb++] = stripes[0];
bars[pb++] = stripes[1];
bars[pb++] = stripes[2];
bars[pb++] = stripes[3];
}
else {
bars[pb++] = stripes[3];
bars[pb++] = stripes[2];
bars[pb++] = stripes[1];
bars[pb++] = stripes[0];
}
}
return bars;
}
/** Creates the bars for the barcode supplemental 5.
* @param _code the text with 5 digits
* @return the barcode
*/
public static byte[] getBarsSupplemental5(String _code) {
int code[] = new int[5];
for (int k = 0; k < code.length; ++k)
code[k] = _code.charAt(k) - '0';
byte bars[] = new byte[TOTALBARS_SUPP5];
int pb = 0;
int parity = (((code[0] + code[2] + code[4]) * 3) + ((code[1] + code[3]) * 9)) % 10;
bars[pb++] = 1;
bars[pb++] = 1;
bars[pb++] = 2;
byte sequence[] = PARITY5[parity];
for (int k = 0; k < sequence.length; ++k) {
if (k != 0) {
bars[pb++] = 1;
bars[pb++] = 1;
}
int c = code[k];
byte stripes[] = BARS[c];
if (sequence[k] == ODD) {
bars[pb++] = stripes[0];
bars[pb++] = stripes[1];
bars[pb++] = stripes[2];
bars[pb++] = stripes[3];
}
else {
bars[pb++] = stripes[3];
bars[pb++] = stripes[2];
bars[pb++] = stripes[1];
bars[pb++] = stripes[0];
}
}
return bars;
}
/** Gets the maximum area that the barcode and the text, if
* any, will occupy. The lower left corner is always (0, 0).
* @return the size the barcode occupies.
*/
public Rectangle getBarcodeSize() {
float width = 0;
float height = barHeight;
if (font != null) {
if (baseline <= 0)
height += -baseline + size;
else
height += baseline - font.getFontDescriptor(BaseFont.DESCENT, size);
}
switch (codeType) {
case EAN13:
width = x * (11 + 12 * 7);
if (font != null) {
width += font.getWidthPoint(code.charAt(0), size);
}
break;
case EAN8:
width = x * (11 + 8 * 7);
break;
case UPCA:
width = x * (11 + 12 * 7);
if (font != null) {
width += font.getWidthPoint(code.charAt(0), size) + font.getWidthPoint(code.charAt(11), size);
}
break;
case UPCE:
width = x * (9 + 6 * 7);
if (font != null) {
width += font.getWidthPoint(code.charAt(0), size) + font.getWidthPoint(code.charAt(7), size);
}
break;
case SUPP2:
width = x * (6 + 2 * 7);
break;
case SUPP5:
width = x * (4 + 5 * 7 + 4 * 2);
break;
default:
throw new RuntimeException("Invalid code type.");
}
return new Rectangle(width, height);
}
/** Places the barcode in a <CODE>PdfContentByte</CODE>. The
* barcode is always placed at coodinates (0, 0). Use the
* translation matrix to move it elsewhere.<p>
* The bars and text are written in the following colors:<p>
* <P><TABLE BORDER=1>
* <TR>
* <TH><P><CODE>barColor</CODE></TH>
* <TH><P><CODE>textColor</CODE></TH>
* <TH><P>Result</TH>
* </TR>
* <TR>
* <TD><P><CODE>null</CODE></TD>
* <TD><P><CODE>null</CODE></TD>
* <TD><P>bars and text painted with current fill color</TD>
* </TR>
* <TR>
* <TD><P><CODE>barColor</CODE></TD>
* <TD><P><CODE>null</CODE></TD>
* <TD><P>bars and text painted with <CODE>barColor</CODE></TD>
* </TR>
* <TR>
* <TD><P><CODE>null</CODE></TD>
* <TD><P><CODE>textColor</CODE></TD>
* <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD>
* </TR>
* <TR>
* <TD><P><CODE>barColor</CODE></TD>
* <TD><P><CODE>textColor</CODE></TD>
* <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD>
* </TR>
* </TABLE>
* @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed
* @param barColor the color of the bars. It can be <CODE>null</CODE>
* @param textColor the color of the text. It can be <CODE>null</CODE>
* @return the dimensions the barcode occupies
*/
public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor) {
Rectangle rect = getBarcodeSize();
float barStartX = 0;
float barStartY = 0;
float textStartY = 0;
if (font != null) {
if (baseline <= 0)
textStartY = barHeight - baseline;
else {
textStartY = -font.getFontDescriptor(BaseFont.DESCENT, size);
barStartY = textStartY + baseline;
}
}
switch (codeType) {
case EAN13:
case UPCA:
case UPCE:
if (font != null)
barStartX += font.getWidthPoint(code.charAt(0), size);
break;
}
byte bars[] = null;
int guard[] = GUARD_EMPTY;
switch (codeType) {
case EAN13:
bars = getBarsEAN13(code);
guard = GUARD_EAN13;
break;
case EAN8:
bars = getBarsEAN8(code);
guard = GUARD_EAN8;
break;
case UPCA:
bars = getBarsEAN13("0" + code);
guard = GUARD_UPCA;
break;
case UPCE:
bars = getBarsUPCE(code);
guard = GUARD_UPCE;
break;
case SUPP2:
bars = getBarsSupplemental2(code);
break;
case SUPP5:
bars = getBarsSupplemental5(code);
break;
}
float keepBarX = barStartX;
boolean print = true;
float gd = 0;
if (font != null && baseline > 0 && guardBars) {
gd = baseline / 2;
}
if (barColor != null)
cb.setColorFill(barColor);
for (int k = 0; k < bars.length; ++k) {
float w = bars[k] * x;
if (print) {
if (Arrays.binarySearch(guard, k) >= 0)
cb.rectangle(barStartX, barStartY - gd, w - inkSpreading, barHeight + gd);
else
cb.rectangle(barStartX, barStartY, w - inkSpreading, barHeight);
}
print = !print;
barStartX += w;
}
cb.fill();
if (font != null) {
if (textColor != null)
cb.setColorFill(textColor);
cb.beginText();
cb.setFontAndSize(font, size);
switch (codeType) {
case EAN13:
cb.setTextMatrix(0, textStartY);
cb.showText(code.substring(0, 1));
for (int k = 1; k < 13; ++k) {
String c = code.substring(k, k + 1);
float len = font.getWidthPoint(c, size);
float pX = keepBarX + TEXTPOS_EAN13[k - 1] * x - len / 2;
cb.setTextMatrix(pX, textStartY);
cb.showText(c);
}
break;
case EAN8:
for (int k = 0; k < 8; ++k) {
String c = code.substring(k, k + 1);
float len = font.getWidthPoint(c, size);
float pX = TEXTPOS_EAN8[k] * x - len / 2;
cb.setTextMatrix(pX, textStartY);
cb.showText(c);
}
break;
case UPCA:
cb.setTextMatrix(0, textStartY);
cb.showText(code.substring(0, 1));
for (int k = 1; k < 11; ++k) {
String c = code.substring(k, k + 1);
float len = font.getWidthPoint(c, size);
float pX = keepBarX + TEXTPOS_EAN13[k] * x - len / 2;
cb.setTextMatrix(pX, textStartY);
cb.showText(c);
}
cb.setTextMatrix(keepBarX + x * (11 + 12 * 7), textStartY);
cb.showText(code.substring(11, 12));
break;
case UPCE:
cb.setTextMatrix(0, textStartY);
cb.showText(code.substring(0, 1));
for (int k = 1; k < 7; ++k) {
String c = code.substring(k, k + 1);
float len = font.getWidthPoint(c, size);
float pX = keepBarX + TEXTPOS_EAN13[k - 1] * x - len / 2;
cb.setTextMatrix(pX, textStartY);
cb.showText(c);
}
cb.setTextMatrix(keepBarX + x * (9 + 6 * 7), textStartY);
cb.showText(code.substring(7, 8));
break;
case SUPP2:
case SUPP5:
for (int k = 0; k < code.length(); ++k) {
String c = code.substring(k, k + 1);
float len = font.getWidthPoint(c, size);
float pX = (7.5f + (9 * k)) * x - len / 2;
cb.setTextMatrix(pX, textStartY);
cb.showText(c);
}
break;
}
cb.endText();
}
return rect;
}
/** Creates a <CODE>java.awt.Image</CODE>. This image only
* contains the bars without any text.
* @param foreground the color of the bars
* @param background the color of the background
* @return the image
*/
public java.awt.Image createAwtImage(Color foreground, Color background) {
int f = foreground.getRGB();
int g = background.getRGB();
Canvas canvas = new Canvas();
int width = 0;
byte bars[] = null;
switch (codeType) {
case EAN13:
bars = getBarsEAN13(code);
width = 11 + 12 * 7;
break;
case EAN8:
bars = getBarsEAN8(code);
width = 11 + 8 * 7;
break;
case UPCA:
bars = getBarsEAN13("0" + code);
width = 11 + 12 * 7;
break;
case UPCE:
bars = getBarsUPCE(code);
width = 9 + 6 * 7;
break;
case SUPP2:
bars = getBarsSupplemental2(code);
width = 6 + 2 * 7;
break;
case SUPP5:
bars = getBarsSupplemental5(code);
width = 4 + 5 * 7 + 4 * 2;
break;
default:
throw new RuntimeException("Invalid code type.");
}
boolean print = true;
int ptr = 0;
int height = (int)barHeight;
int pix[] = new int[width * height];
for (int k = 0; k < bars.length; ++k) {
int w = bars[k];
int c = g;
if (print)
c = f;
print = !print;
for (int j = 0; j < w; ++j)
pix[ptr++] = c;
}
for (int k = width; k < pix.length; k += width) {
System.arraycopy(pix, 0, pix, k, width);
}
Image img = canvas.createImage(new MemoryImageSource(width, height, pix, 0, width));
return img;
}
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -