Java後端生成二維碼
pom.xml文件需要添加依賴jar包:
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.1</version>
</dependency>
生成二維碼的工具類:
package com.wust.Hisportal.user.admin.util;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import javax.imageio.ImageIO;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
/**
* 二維碼工具類
* @author yanzc
*
*/
public class QRCodeUtil {
private static final Logger logger = LoggerFactory.getLogger(QRCodeUtil.class);
//二維碼顏色
private static final int BLACK = 0xFF000000;
//二維碼顏色
private static final int WHITE = 0xFFFFFFFF;
//二維碼寬
private static final int width = 200;
//二維碼高
private static final int height = 200;
//二維碼生成格式
private static final String imageType = "jpg";
public static void main(String[] args) throws Exception {
String str = "人員編碼:1234;人員姓名:李四;";
zxingCodeCreate(str, "D:/二維碼.jpg");
}
/**
* 生成二維碼
* @param text 二維碼內容
* @param outPutPath 二維碼生成保存路徑
*/
public static void zxingCodeCreate(String text, String outPutPath){
Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();
//設置編碼字符集
his.put(EncodeHintType.CHARACTER_SET, "utf-8");
try {
//1、生成二維碼
BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);
//2、獲取二維碼寬高
int codeWidth = encode.getWidth();
int codeHeight = encode.getHeight();
//3、將二維碼放入緩衝流
BufferedImage image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);
for (int i = 0; i < codeWidth; i++) {
for (int j = 0; j < codeHeight; j++) {
//4、循環將二維碼內容定入圖片
image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);
}
}
File outPutImage = new File(outPutPath);
//如果圖片不存在創建圖片
if(!outPutImage.exists())
outPutImage.createNewFile();
//5、將二維碼寫入圖片
ImageIO.write(image, imageType, outPutImage);
} catch (WriterException e) {
e.printStackTrace();
logger.info("二維碼生成失敗");
} catch (IOException e) {
e.printStackTrace();
logger.info("生成二維碼圖片失敗");
}
}
/**
* 二維碼解析
* @param analyzePath 二維碼路徑
* @return
* @throws IOException
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public static String zxingCodeAnalyze(String analyzePath) throws Exception{
MultiFormatReader formatReader = new MultiFormatReader();
String resultStr = null;
try {
File file = new File(analyzePath);
if (!file.exists()) {
return "二維碼不存在";
}
BufferedImage image = ImageIO.read(file);
LuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
Result result = formatReader.decode(binaryBitmap, hints);
resultStr = result.getText();
} catch (NotFoundException e) {
e.printStackTrace();
}
logger.info(resultStr);
return resultStr;
}
}