条形码 (Barcode)

条形码用于表示与某个对象相关的数据，该数据可通过光学机器进行读取。最初的条形码系统是通过平行线间宽度和间距的不同来表示数据，可称为线性条形码或一维条形码( 1D)。后来条形码逐渐演变成矩形、点、六边形等 2D 几何图案。虽然 2D 系统使用了一系列符号，但是它们通常也被称为条形码。条形码最初由特定的光学扫描器进行扫描，该光学扫面器被称为条形码读取器。后来扫描器和解释软件成功应用于桌面打印机和智能手机等设备。福昕 PDF SDK 提供了从给定字符串生成条形码位图的应用程序。以下表格列出了福昕 PDF SDK 支持的条形码类型。

条形码类型	Code39	Code128	EAN8	UPCA	EAN13	ITF	PDF417	QR
维度	1D	1D	1D	1D	1D	1D	2D	2D

从字符串生成条形码位图

c++

#include "include/common/fs_common.h"
#include "include/common/fs_barcode.h"

using namespace foxit;
using namespace foxit::common;
using foxit::common::Library;
...

// Strings used as barcode content.
WString sz_code_string = L"TEST-SHEET";
  
// Barcode format types.
Barcode::Format code_format = Barcode::e_FormatCode39;

//Format error correction level of QR code.
Barcode::QRErrorCorrectionLevel sz_qr_level = Barcode::e_QRCorrectionLevelLow;
  
//Image names for the saved image files for QR code.
WString bmp_qr_name = L"/QR_CODE_TestForBarcodeQrCode_L.bmp";

// Unit width for barcode in pixels, preferred value is 1-5 pixels.
int unit_width = 2;

// Unit height for barcode in pixels, preferred value is >= 20 pixels.
int unit_height = 120;

Barcode barcode;
Bitmap bitmap = barcode.GenerateBitmap(sz_code_string, code_format, unit_width, unit_height, sz_qr_level);
...

C

#include "include/fs_basictypes_c.h"
#include "include/fs_common_c.h"
#include "include/fs_barcode_c.h"
...

// Strings used as barcode content.
const wchar_t* sz_code_string = L"TEST-SHEET";
  
// Barcode format types.
FSFormat code_format = e_FSFormatCode39;

//Format error correction level of QR code.
FSQRErrorCorrectionLevel sz_qr_level = e_FSQRCorrectionLevelLow;
  
//Image names for the saved image files for QR code.
const wchar_t* bmp_qr_name = L"/QR_CODE_TestForBarcodeQrCode_L.bmp";

// Unit width for barcode in pixels, preferred value is 1-5 pixels.
int unit_width = 2;

// Unit height for barcode in pixels, preferred value is >= 20 pixels.
int unit_height = 120;

FS_BARCODE_HANDLE barcode;
FSDK_Barcode_Create(barcode);
FS_BITMAP_HANDLE bitmap;
FSDK_Barcode_GenerateBitmap(barcode, sz_code_string, code_format, unit_width, unit_height, sz_qr_level, &bitmap);
...

java

import com.foxit.sdk.common.Barcode;
...

// Strings used as barcode content.
String codeStr = "TEST-SHEET"
  
// Barcode format types.
int codeFormat = Barcode.e_FormatCode39;

// Format error correction level of QR code.
int qrLevel = Barcode.e_QRCorrectionLevelLow;
  
// Image names for the saved image files for QR code.
String bmpQrName = "/QR_CODE_TestForBarcodeQrCode_L.bmp";

// Unit width for barcode in pixels, preferred value is 1-5 pixels.
int unitWidth = 2;

// Unit height for barcode in pixels, preferred value is >= 20 pixels.
int unitHeight = 120;

Barcode barcode = new Barcode();
Bitmap bitmap = barcode.generateBitmap(codeStr, codeFormat, unitWidth, unitHeight, qrLevel);
...

py

import sys
import site

if sys.version_info.major == 2:
    _PYTHON2_ = True
else:
    _PYTHON2_ = False

if _PYTHON2_:
    #replace with the python2 lib path
    site.addsitedir('../../../')
    from FoxitPDFSDKPython2 import *
else:
    from FoxitPDFSDKPython3 import *
...

# Strings used as barcode content.
sz_code_string = "TEST-SHEET"
  
# Barcode format types.
code_format = Barcode.e_FormatCode39

#Format error correction level of QR code.
sz_qr_level = Barcode.e_QRCorrectionLevelLow
  
#Image names for the saved image files for QR code.
bmp_qr_name = "/QR_CODE_TestForBarcodeQrCode_L.bmp"

# Unit width for barcode in pixels, preferred value is 1-5 pixels.
unit_width = 2

# Unit height for barcode in pixels, preferred value is >= 20 pixels.
unit_height = 120

barcode = Barcode() 
bitmap = barcode.GenerateBitmap(sz_code_string, code_format, unit_width, unit_height, sz_qr_level)

objc

#include "FSPDFObjC.h"
...

// Strings used as barcode content.
NSString *code_string = @"TEST-SHEET";
// Barcode format types.
FSBarcodeFormat code_format = FSBarcodeFormatCode39;
// Format error correction level of QR code.
FSBarcodeQRErrorCorrectionLevel qr_level = FSBarcodeQRCorrectionLevelLow;
// Unit width for barcode in pixels, preferred value is 1-5 pixels.
int unitWidth = 2;
// Unit height for barcode in pixels, preferred value is >= 20 pixels.
int unitHeight = 120;

FSBarcode *barcode = [[FSBarcode alloc] init];
FSBitmap *bitmap = [barcode generateBitmap: code_string format:code_format unit_width:unit_width unit_height:unit_height level:qr_level];
...

js

const FSDK = require("@foxitsoftware/foxit-pdf-sdk-node");
...

// Strings used as barcode content.
let sz_code_string = "TEST-SHEET";

// Barcode format types.
let code_format = FSDK.Barcode.e_FormatCode39;

// Format error correction level of QR code.
let sz_qr_level = FSDK.Barcode.e_QRCorrectionLevelLow;

// Image names for the saved image files for QR code.
let bmp_qr_name = "/QR_CODE_TestForBarcodeQrCode_L.bmp";

// Unit width for barcode in pixels, preferred value is 1-5 pixels.
let unit_width = 2;

// Unit height for barcode in pixels, preferred value is >= 20 pixels.
let unit_height = 120;

let barcode = new FSDK.Barcode();
let bitmap = barcode.GenerateBitmap(sz_code_string, code_format, unit_width, unit_height, sz_qr_level);

csharp

using foxit;
using foxit.common;
using foxit.common.fxcrt;
...

// Strings used as barcode content.
String sz_code_str = "TEST-SHEET";

// Barcode format types.
Barcode.Format sz_code_format = Barcode.Format.e_FormatCode39;

//Format error correction level of QR code.
Barcode.QRErrorCorrectionLevel qr_level = Barcode.QRErrorCorrectionLevel.e_QRCorrectionLevelLow;

//Image names for the saved image files for QR code.
String sz_bmp_qr_name = "/QR_CODE_TestForBarcodeQrCode_L.bmp";

// Unit width for barcode in pixels, preferred value is 1-5 pixels.
int unit_width = 2;

// Unit height for barcode in pixels, preferred value is >= 20 pixels.
int unit_height = 120;

Barcode barcode;
Barcode barcode = new Barcode();

foxit.common.Bitmap bitmap = barcode.GenerateBitmap(sz_code_str, sz_code_format, unit_width, unit_height, qr_level);
...