二維碼（Quick Response Code），又稱二維條碼，它是用特定的幾何圖形按一定規律在平面（二維方向）上分佈的黑白相間的圖形，是所有資訊資料的一把鑰匙。在現代商業活動中，可實現的應用十分廣泛，如：產品防偽/溯源、廣告推送、網站連結、資料下載、商品交易、定位/導航、電子商務應用、車輛管理、資訊傳遞等。如今智慧手機掃一掃（簡稱313）功能的應用使得二維碼更加普遍，隨著國內物聯網產業的蓬勃發展，更多的二維碼技術應用解決方案被開發，二維碼成為移動網際網路入口真正成為現實。

前端JQUERY生成方法:

依賴JS檔案:  ↓ ↓ ↓

生成二維碼頁面位置插入如下div:

<div id="code"></div>

 頁面載入程式碼:

<script>
var id="${param.qrcode}";
if(id!=""&&id!=null){
$("#code").qrcode({
render: "table", //table方式
width: 200, //寬度
height:200, //高度
text: id //任意內容
});
}
</script>

 後臺GOOGLE  ZXING生成方法:

生成本地JPG二維碼圖片:

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
public class test {
public static void main(String[] args){
try {
 
String content ="www.centit.com";
String path = "C:/";
 
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
 
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 400, 400,hints);
File file1 = new File(path,"二維碼.jpg");
MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
 
} catch (Exception e) {
e.printStackTrace();
}
}
 

MatrixToImageWriter.java

public final class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private MatrixToImageWriter() {}
 
public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
}
}
return image;
}
 
public static void writeToFile(BitMatrix matrix, String format, File file)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format " + format + " to " + file);
}
}
 
public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}
}

依賴JRA包:core-2.0.jar,SOURCE:core-2.0-sources.jar

POM:

<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>2.0</version>
</dependency>