QRGeneratorと呼ばれる「静的クラス」があります。その目的はBitMatrixオブジェクトを生成し、そこからBufferedImageオブジェクトを生成することです。これはそれのためのコードです:BitMatrixオブジェクトでHashMapをシリアル化するにはどうすればよいですか? (QRコード/ zxing)
package ericsonwrp.republica.vintage.caixa;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.util.EnumMap;
import java.util.Map;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class QRGenerator {
private static BufferedImage image = null;
private static int size = 250;
private static BitMatrix byteMatrix = null;
public static BitMatrix generateBitMatrix(String codeText) {
try {
Map<EncodeHintType, Object> hintMap = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");
hintMap.put(EncodeHintType.MARGIN, 1);
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
QRCodeWriter qrCodeWriter = new QRCodeWriter();
byteMatrix = qrCodeWriter.encode(codeText, BarcodeFormat.QR_CODE, size,
size, hintMap);
} catch (WriterException e) {
e.printStackTrace();
}
return byteMatrix;
}
public static BufferedImage generateImage(BitMatrix byteMatrix) {
int width = byteMatrix.getWidth();
image = new BufferedImage(width, width,
BufferedImage.TYPE_INT_RGB);
image.createGraphics();
Graphics2D graphics = (Graphics2D) image.getGraphics();
graphics.setColor(Color.WHITE);
graphics.fillRect(0, 0, width, width);
graphics.setColor(Color.BLACK);
for (int i = 0; i < width; i++) {
for (int j = 0; j < width; j++) {
if (byteMatrix.get(i, j)) {
graphics.fillRect(i, j, 1, 1);
}
}
}
return image;
}
}
私がその目的である私のアプリケーションの「コンテンツ」を保存するために独自のファイルを定義するための、およびシリアル化する方法を提供すること「RepublicaVintageFile」と呼ばれる別のクラスを、(持っており、読んでください、これは質問には関係ありません)この "内容"。これはそれのためのコードです:
package ericsonwrp.republica.vintage.caixa;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.util.HashMap;
public class RepublicaVintageFile {
private HashMap<String, Object> content;
public RepublicaVintageFile() {
setContent(new HashMap<String, Object>());
}
public void serializeContent(String path) throws IOException {
FileOutputStream fout = new FileOutputStream(path, true);
ObjectOutput out = null;
try {
out = new ObjectOutputStream(fout);
out.writeObject(getContent());
} finally {
try {
if (out != null) {
out.close();
}
} catch (IOException ex) {
// ignore close exception
}
try {
fout.close();
} catch (IOException ex) {
// ignore close exception
}
}
}
public HashMap<String, Object> getContent() {
return content;
}
public void setContent(HashMap<String, Object> content) {
this.content = content;
}
}
私のアプリケーションの「コンテンツ」とは、異なるファイル(private HashMap<String, BitMatrix> qrItems;
)にHashMapの内側のラベルの下に保存されているBitMatrixオブジェクトが含まれます。最終的なBufferedImageをシリアル化するとjava.io.NotSerializableException
になるので、私はBitMatrixオブジェクトをシリアル化しようとしました。しかし、私の失望のために、それも不可能です。これは、スタックトレースです:
java.io.NotSerializableException: com.google.zxing.common.BitMatrix
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.HashMap.internalWriteEntries(Unknown Source)
at java.util.HashMap.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.HashMap.internalWriteEntries(Unknown Source)
at java.util.HashMap.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at ericsonwrp.republica.vintage.caixa.RepublicaVintageFile.serializeContent(RepublicaVintageFile.java:26)
at ericsonwrp.republica.vintage.caixa.MainFrame.openSaveAsDialog(MainFrame.java:204)
at ericsonwrp.republica.vintage.caixa.MainFrame.access$1(MainFrame.java:177)
at ericsonwrp.republica.vintage.caixa.MainFrame$4.actionPerformed(MainFrame.java:112)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
、私は私の質問に来る:どのように私はBitMatrixオブジェクトでHashMapをシリアライズすることができますか?フォルダに100個(またはそれ以上)の別々の.pngファイルを保存する必要はなく、常にコンテンツを取得するためにイメージを読み取る必要があるため、重要です。
画像は私がそれについて読むことを思い出す限り、(Javaの華麗な「シリアライザ」で)シリアル化されていません – gpasch