如下为java生成二维码工具类，可以选择生成文件，或者直接在页面生成:

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.nio.file.FileSystems;

import java.util.HashMap;

import java.util.Map;

import javax.imageio.ImageIO;

import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.alibaba.fastjson.JSONObject;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.Binarizer;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.DecodeHintType;

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.client.j2se.MatrixToImageWriter;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.common.HybridBinarizer;

/**

*

* 二维码工具类

* @see [相关类/方法]

* @since [产品/模块版本]

*/

public class QRCodeUtil

{

private static final Logger log = LoggerFactory.getLogger(QRCodeUtil.class);

/**

*

* 生成二维码文件测试

* @param filePath 文件路径

* @param fileName 文件名

* @param number 编号

* @param phone 手机号

* @see [类、类#方法、类#成员]

*/

public static void generatEncodeTest(String filePath, String fileName, String number, String phone)

{

int width = 200; // 图像宽度

int height = 200; // 图像高度

String format = "png";// 图像类型

JSONObject json = new JSONObject();

json.put("number",number);

json.put("phone", phone);

String content = json.toJSONString();// 内容

Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

try

{

BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵

String path = FileSystems.getDefault().getPath(filePath, fileName).toString();

File file = new File(path);

MatrixToImageWriter.writeToFile(bitMatrix, format, file);// 输出图像

System.out.println("二维码输出成功");

System.out.println("图片地址：" + filePath + fileName);

System.out.println("---------------------------");

}

catch (WriterException e)

{

e.printStackTrace();

System.out.println("二维码输出异常");

}

catch (IOException e)

{

e.printStackTrace();

System.out.println("二维码输出异常");

}

}

/**

*

* 解析二维码内容测试

* @param filePath 二维码绝对路径

* @see [类、类#方法、类#成员]

*/

public static void parseDecodeTest(String filePath)

{

BufferedImage image;

try

{

image = ImageIO.read(new File(filePath));

LuminanceSource source = new BufferedImageLuminanceSource(image);

Binarizer binarizer = new HybridBinarizer(source);

BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);

Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();

hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");

Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码

JSONObject content = JSONObject.parseObject(result.getText());

StringBuffer sb = new StringBuffer();

sb.append("编号：")

.append(content.getString("number"))

.append("\r\n")

.append("手机号码:")

.append(content.getString("phone"));

String returnText = sb.toString();

System.out.println(returnText);

}

catch (IOException e)

{

e.printStackTrace();

}

catch (NotFoundException e)

{

e.printStackTrace();

}

}

/**

*

* 生成二维码输出流

* 在jsp页面中直接展示时使用

* 无须保存 即生成即展示

* @param response

* @param number 编号

* @param phone 手机号

* @see [类、类#方法、类#成员]

*/

public static void generatEncode(HttpServletResponse response, String number, String phone)

{

JSONObject json = new JSONObject();

json.put("number",number);

json.put("phone", phone);

String content = json.toJSONString();// 内容

int width = 200; // 图像宽度

int height = 200; // 图像高度

String format = "png";// 图像类型

Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();

hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

try

{

BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵

MatrixToImageWriter.writeToStream(bitMatrix, format, response.getOutputStream());// 输出图像

log.info("二维码输出成功");

}

catch (WriterException e)

{

e.printStackTrace();

log.error("二维码输出异常");

}

catch (IOException e)

{

e.printStackTrace();

log.error("二维码输出异常");

}

}

public static void main(String[] args)

{

generatEncodeTest("D:\\","zxing.png","001","13019931996");

parseDecodeTest("D:\\zxing.png");

}

}