Java 生成二维码上传第三方平台（详解）

港控/mmm° 2022-03-09 12:18 143阅读 0赞

我们的这个第三方平台目前使用的是七牛云

pom.xml:

<dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
    </dependency>
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>core</artifactId>
        <version>3.1.0</version>
    </dependency>
    <dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>javase</artifactId>
        <version>3.0.0</version>
    </dependency>
    
    <dependency>
        <groupId>com.qiniu</groupId>
        <artifactId>qiniu-java-sdk</artifactId>
        <version>7.2.18</version>
    </dependency>

生成二维码并且上传：

package org.ewhl.common.utils;
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.HashMap;
    import java.util.Map;
    
    import javax.imageio.ImageIO;
    
    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;
    
    public class QRCodeUtil {
    	//二维码颜色  
        private static final int BLACK = 0xFF000000;  
        //二维码颜色  
        private static final int WHITE = 0xFFFFFFFF;  
      
        /*public static void main(String[] args) throws Exception {
        	zxingCodeCreate("http://www.baidu.com", 300, 300, "D:/qrcode.jpg", "jpg");
        	zxingCodeAnalyze("D:/qrcode.jpg");
    	}*/
        /**  生成二维码
         * @param text    二维码内容
         * @param width    二维码宽 
         * @param height    二维码高 
         * @param outPutPath    二维码生成保存路径 
         * @param imageType     二维码生成格式 
         */  
        public static Map<String,Object> zxingCodeCreate(String text, int width, int height){  
            Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();  
            //设置编码字符集  
            his.put(EncodeHintType.CHARACTER_SET, "utf-8");  
            try {  
                //1、生成二维码  
                BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);  
                //2、获取二维码宽高  
                int codeWidth = encode.getWidth();  
                int codeHeight = encode.getHeight();  
                //3、将二维码放入缓冲流  
                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、循环将二维码内容定入图片  
                        image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);  
                    }  
                } 
                // 创建一个输出流
                ByteArrayOutputStream os = new ByteArrayOutputStream();
                //将图片写出到指定位置（复制图片）
                ImageIO.write(image, "jpg", os);  
                // 创建输入流获取存放输出流信息
                // toByteArray(): 创建一个新分配的字节数组,数组的大小和当前输出流的大小,内容是当前输出流的拷贝。
                InputStream is = new ByteArrayInputStream(os.toByteArray());  
                // 定义一个 Map 集合 存放返回值
                // UploadUtils.upload：调用七牛云的方法（因为返回值是Map类型的，所以用Map来存放）
                Map<String,Object> retMap = UploadUtils.upload(is);
                return retMap;
                /*//存储到本地
                File outPutImage = new File(outPutPath);  
                //如果图片不存在创建图片  
                if(!outPutImage.exists())  
                	//outPutImage.createNewFile();  
                //5、将二维码写入图片  
                ImageIO.write(image, imageType, outPutImage);  */
            } catch (WriterException e) {  
                e.printStackTrace();  
                System.out.println("二维码生成失败");  
            } catch (IOException e) {  
                e.printStackTrace();  
                System.out.println("生成二维码图片失败");  
            }
    		return null;  
        }  
          
        /** 二维码解析 
         * @param analyzePath    二维码路径 
         * @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 "二维码不存在";  
                }  
                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();  
            }    
            System.out.println(resultStr);
            return resultStr;  
        }  
          
    }

七牛云代码：

package org.ewhl.common.utils;
    
    import java.io.InputStream;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.UUID;
    
    import com.google.gson.Gson;
    import com.qiniu.common.QiniuException;
    import com.qiniu.common.Zone;
    import com.qiniu.http.Response;
    import com.qiniu.storage.Configuration;
    import com.qiniu.storage.UploadManager;
    import com.qiniu.storage.model.DefaultPutRet;
    import com.qiniu.util.Auth;
    public class UploadUtils {
    
    	public static Map<String,Object> upload(InputStream stream) {
    
    		Map<String,Object> retMap = new HashMap<String,Object>();
    		// 构造一个带指定Zone对象的配置类
    		Configuration cfg = new Configuration(Zone.zone0());
    		// ...其他参数参考类注释
    		UploadManager uploadManager = new UploadManager(cfg);
    		// ...生成上传凭证，然后准备上传
    		String accessKey = "凭证码";
    		String secretKey = "凭证码";
    		String bucket = "wdlife";
    		// 默认不指定key的情况下，以文件内容的hash值作为文件名
    		String key = UUID.randomUUID().toString().replaceAll("\\-", "");
    		try {
    			Auth auth = Auth.create(accessKey, secretKey);
    			String upToken = auth.uploadToken(bucket);
    			try {
    				Response response = uploadManager.put(stream, key, upToken, null, null);
    				// 解析上传成功的结果
    				DefaultPutRet putRet = new Gson().fromJson(response.bodyString(), DefaultPutRet.class);
    				retMap.put("url","上传的连接"+putRet.key);
    				retMap.put("hash",putRet.hash);
    				/*System.out.println(putRet.key);
    				System.out.println(putRet.hash);*/
    			} catch (QiniuException ex) {
    				Response r = ex.response;
    				System.err.println(r.toString());
    				try {
    					System.err.println(r.bodyString());
    				} catch (QiniuException ex2) {
    					ex2.printStackTrace();
    				}
    			}
    		} catch (Exception ex) {
    			ex.printStackTrace();
    		}
    		return retMap;
    	}
    }

因为本身自己也是小白，然后第一次写这种上传，如有不对的地方，请留言指教，谢谢！！