java 介面實現壓縮後的生成多張二維碼
阿新 • • 發佈：2018-12-18
pom的jar包：
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>
package com.jinsuicloud.api.util; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; import java.awt.image.BufferedImage; import com.google.zxing.LuminanceSource; /** * LuminanceSource這類層次結構的目的是不同的點陣圖實現跨平臺為請求獲得灰度亮度值的標準介面。該介面只提供了抽象方法， * 因此可以生成和旋轉建立副本。這是為了確保一個讀者不修改原來的亮度源，並讓它在一個未知的狀態，在鏈中的其他讀者。 * https://zxing.github.io/zxing/apidocs/com/google/zxing/LuminanceSource.html * @author ljheee * */ public class BufferedImageLuminanceSource extends LuminanceSource { private final BufferedImage image; private final int left; private final int top; public BufferedImageLuminanceSource(BufferedImage image) { this(image, 0, 0, image.getWidth(), image.getHeight()); } /** * 構造方法 * @param image * @param left * @param top * @param width * @param height */ public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) { super(width, height); int sourceWidth = image.getWidth(); int sourceHeight = image.getHeight(); if (left + width > sourceWidth || top + height > sourceHeight) { throw new IllegalArgumentException("Crop rectangle does not fit within image data."); } for (int y = top; y < top + height; y++) { for (int x = left; x < left + width; x++) { if ((image.getRGB(x, y) & 0xFF000000) == 0) { image.setRGB(x, y, 0xFFFFFFFF); // = white } } } this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY); this.image.getGraphics().drawImage(image, 0, 0, null); this.left = left; this.top = top; } @Override public byte[] getRow(int y, byte[] row) {//從底層平臺的點陣圖提取一行（only one row）的亮度資料值 if (y < 0 || y >= getHeight()) { throw new IllegalArgumentException("Requested row is outside the image: " + y); } int width = getWidth(); if (row == null || row.length < width) { row = new byte[width]; } image.getRaster().getDataElements(left, top + y, width, 1, row); return row; } @Override public byte[] getMatrix() {///從底層平臺的點陣圖提取亮度資料值 int width = getWidth(); int height = getHeight(); int area = width * height; byte[] matrix = new byte[area]; image.getRaster().getDataElements(left, top, width, height, matrix); return matrix; } @Override public boolean isCropSupported() {//是否支援裁剪 return true; } /** * 返回一個新的物件與裁剪的影象資料。實現可以儲存對原始資料的引用，而不是複製。 */ @Override public LuminanceSource crop(int left, int top, int width, int height) { return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height); } @Override public boolean isRotateSupported() {//是否支援旋轉 return true; } @Override public LuminanceSource rotateCounterClockwise() {//逆時針旋轉影象資料的90度，返回一個新的物件。 int sourceWidth = image.getWidth(); int sourceHeight = image.getHeight(); AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth); BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY); Graphics2D g = rotatedImage.createGraphics(); g.drawImage(image, transform, null); g.dispose(); int width = getWidth(); return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width); } }
package com.jinsuicloud.api.util; import java.awt.BasicStroke; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Shape; import java.awt.geom.RoundRectangle2D; import java.awt.image.BufferedImage; import java.io.File; import java.io.OutputStream; import java.util.Date; import java.util.Hashtable; import java.util.Random; import javax.imageio.ImageIO; import com.google.zxing.BarcodeFormat; import com.google.zxing.BinaryBitmap; import com.google.zxing.DecodeHintType; import com.google.zxing.EncodeHintType; import com.google.zxing.MultiFormatReader; import com.google.zxing.MultiFormatWriter; import com.google.zxing.Result; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; /** * 二維碼生成工具 * @author ljheee * */ public class QRCodeUtil { private static final String CHARSET = "utf-8"; private static final String FORMAT_NAME = "JPG"; // 二維碼尺寸 private static final int QRCODE_SIZE = 300; // LOGO寬度 private static final int WIDTH = 60; // LOGO高度 private static final int HEIGHT = 60; /** * 生成二維碼 * @param content 源內容 * @param imgPath 生成二維碼儲存的路徑 * @param needCompress 是否要壓縮 * @return 返回二維碼圖片 * @throws Exception */ private static BufferedImage createImage(String content, String imgPath, boolean needCompress) throws Exception { Hashtable hints = new Hashtable(); hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); hints.put(EncodeHintType.CHARACTER_SET, CHARSET); hints.put(EncodeHintType.MARGIN, 1); BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints); int width = bitMatrix.getWidth(); int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF); } } if (imgPath == null || "".equals(imgPath)) { return image; } // 插入圖片 QRCodeUtil.insertImage(image, imgPath, needCompress); return image; } /** * 在生成的二維碼中插入圖片 * @param source * @param imgPath * @param needCompress * @throws Exception */ private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception { System.out.println("imgPath====="+imgPath); File file = new File(imgPath); if (!file.exists()) { System.err.println("" + imgPath + " 該檔案不存在！"); return; } Image src = ImageIO.read(new File(imgPath)); int width = src.getWidth(null); int height = src.getHeight(null); if (needCompress) { // 壓縮LOGO if (width > WIDTH) { width = WIDTH; } if (height > HEIGHT) { height = HEIGHT; } Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH); BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(image, 0, 0, null); // 繪製縮小後的圖 g.dispose(); src = image; } // 插入LOGO Graphics2D graph = source.createGraphics(); int x = (QRCODE_SIZE - width) / 2; int y = (QRCODE_SIZE - height) / 2; graph.drawImage(src, x, y, width, height, null); Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6); graph.setStroke(new BasicStroke(3f)); graph.draw(shape); graph.dispose(); } /** * 生成帶logo二維碼，並儲存到磁碟 * @param content * @param imgPath logo圖片 * @param destPath * @param needCompress * @throws Exception */ public static String encode(String uuid,String content, String imgPath, String destPath, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); mkdirs(destPath); String file = uuid + ".jpg";//生成隨機檔名 ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file)); System.err.println("圖片地址："+(destPath+"/"+file)); return destPath+"/"+file; } public static void mkdirs(String destPath) { File file = new File(destPath); // 當資料夾不存在時，mkdirs會自動建立多層目錄，區別於mkdir。(mkdir如果父目錄不存在則會丟擲異常) if (!file.exists() && !file.isDirectory()) { file.mkdirs(); } } public static void encode(String uuid,String content, String imgPath, String destPath) throws Exception { QRCodeUtil.encode(uuid,content, imgPath, destPath, false); } public static void encode(String uuid,String content, String destPath, boolean needCompress) throws Exception { QRCodeUtil.encode(uuid,content, null, destPath, needCompress); } public static void encode(String uuid,String content, String destPath) throws Exception { QRCodeUtil.encode(uuid,content, null, destPath, false); } public static void encode(String uuid,String content, String imgPath, OutputStream output, boolean needCompress) throws Exception { BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress); ImageIO.write(image, FORMAT_NAME, output); } public static void encode(String uuid,String content, OutputStream output) throws Exception { QRCodeUtil.encode(uuid,content, null, output, false); } /** * 從二維碼中，解析資料 * @param file 二維碼圖片檔案 * @return 返回從二維碼中解析到的資料值 * @throws Exception */ public static String decode(File file) throws Exception { BufferedImage image; image = ImageIO.read(file); if (image == null) { return null; } BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image); BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); Result result; Hashtable hints = new Hashtable(); hints.put(DecodeHintType.CHARACTER_SET, CHARSET); result = new MultiFormatReader().decode(bitmap, hints); String resultStr = result.getText(); return resultStr; } public static String decode(String path) throws Exception { return QRCodeUtil.decode(new File(path)); } }
壓縮工具類：
package com.jinsuicloud.api.util; import java.io.BufferedInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.zip.CRC32; import java.util.zip.CheckedOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class ZipCompressor { static final int BUFFER = 8192; private File zipFile; public ZipCompressor(String pathName) { zipFile = new File(pathName); } public void compress(String... pathName) { ZipOutputStream out = null; try { FileOutputStream fileOutputStream = new FileOutputStream(zipFile); CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream, new CRC32()); out = new ZipOutputStream(cos); String basedir = ""; for (int i=0;i<pathName.length;i++){ if(pathName[i]!=null && pathName[i]!=""){ compress(new File(pathName[i]), out, basedir); } } out.close(); } catch (Exception e) { throw new RuntimeException(e); } } public void compress(String srcPathName) { File file = new File(srcPathName); if (!file.exists()) throw new RuntimeException(srcPathName + "不存在！"); try { FileOutputStream fileOutputStream = new FileOutputStream(zipFile); CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream, new CRC32()); ZipOutputStream out = new ZipOutputStream(cos); String basedir = ""; compress(file, out, basedir); out.close(); } catch (Exception e) { throw new RuntimeException(e); } } private void compress(File file, ZipOutputStream out, String basedir) { /* 判斷是目錄還是檔案 */ if (file.isDirectory()) { System.out.println("壓縮：" + basedir + file.getName()); this.compressDirectory(file, out, basedir); } else { System.out.println("壓縮：" + basedir + file.getName()); this.compressFile(file, out, basedir); } } /** 壓縮一個目錄 */ private void compressDirectory(File dir, ZipOutputStream out, String basedir) { if (!dir.exists()) return; File[] files = dir.listFiles(); for (int i = 0; i < files.length; i++) { /* 遞迴 */ compress(files[i], out, basedir + dir.getName() + "/"); } } /** 壓縮一個檔案 */ private void compressFile(File file, ZipOutputStream out, String basedir) { if (!file.exists()) { return; } try { BufferedInputStream bis = new BufferedInputStream( new FileInputStream(file)); ZipEntry entry = new ZipEntry(basedir + file.getName()); out.putNextEntry(entry); int count; byte data[] = new byte[BUFFER]; while ((count = bis.read(data, 0, BUFFER)) != -1) { out.write(data, 0, count); } bis.close(); } catch (Exception e) { throw new RuntimeException(e); } } public static void main(String[] args) { ZipCompressor zc = new ZipCompressor("C:/Users/wj/Desktop/aaa.zip"); zc.compress("C:/Users/wj/Desktop/water.js","C:/Users/wj/Desktop/index.jsp"); } }
@Override
public String[] getQRC(String suuid) {
List<String> map = measurePointDao.getmeasurePointUuid(suuid);
String[] file = new String[map.size()];
try {
if(map.size()!=0){
String url = this.getClass().getClassLoader().getResource("/").toURI().getPath()+"img/01.png";
for(int i=0;i<map.size();i++){
if(map.get(i)!=null &&map.get(i)!=""){
file[i] = QRCodeUtil.encode(map.get(i),map.get(i),url,"",true);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return file;
}控制層程式碼：
@RequestMapping(value = "/getQRC")
public ResponseEntity<byte[]> getQRC(HttpServletRequest request, String uuid) throws IOException {
String[] file1 = QRCodeService.getQRC(uuid);
HttpHeaders headers = new HttpHeaders();
String fileName = new String((uuid + "_" + TimeToolsUtil.getUserDate() + ".zip").getBytes("UTF-8"),
"iso-8859-1");// 為了解決中文名稱亂碼問題
ZipCompressor zc = new ZipCompressor(fileName);
zc.compress(file1);
for(String str:file1){
File dir=new File(str);
dir.delete();
}
File file = new File(fileName);
headers.setContentDispositionFormData("attachment", fileName); // 下載後顯示的名字
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
byte[] t =FileUtils.readFileToByteArray(file);
file.delete();
return new ResponseEntity<byte[]>(t, headers, HttpStatus.CREATED); // 向瀏覽器傳送資料
}/**
* 根據使用者傳入的時間表示格式，返回當前時間的格式 如果是yyyyMMdd，注意字母y不能大寫。
*
* @param sformat
* yyyyMMddhhmmss
* @return
*/
public static String getUserDate() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddhhmmss");
String dateString = formatter.format(currentTime);
return dateString;
} 