Java筆記之開發二維碼

原創

子沐丶一念

2020-02-21 20:22

1.環境：eclipse+jdk1.7+tomcat6.0

2.jar：使用谷歌的baCodejar(可以自己下載)

3.開發詳細代碼如下：

實現的代碼：

/**
*
*/
package com.wisco.ty.comm;

import java.io.File;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import org.m6.base.BaseBO;
import org.m6.exception.AppException;
import org.springframework.stereotype.Component;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.wisco.framework.utils.AppUtils;

/**
* 二維碼生成
* @file TyjcComm05BO.java
* @author 姓名</a>
* @date 2014-11-19下午1:55:47
* @version 1.0
*/
@Component("tyjcComm05BO")
public class TyjcComm05BO extends BaseBO {
public final static String CLASS_VERSION = "$Id: TyjcComm05.java,v 1.0 2014-10-20,下午02:03:14 $";

/**生成二維碼
* @param infoMap
* @return
*/
public File getTdCode(Map<String, Object> infoMap){

  String str = getInfoMapToString(infoMap);
  String timestamp = "" + System.currentTimeMillis();

  String path = AppUtils.getErpPropertyValueByKey("ERP_HOME","")+"/public/barCode";
  //String path = "public/barCode";
  createDir(path);
  String fileName = timestamp + ".png";
  path += "/" + fileName;
  File outputFile = new File(path.toString());

  Map<EncodeHintType, Object> hints = new TreeMap<EncodeHintType, Object>();
  // 指定糾錯等級
  hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
  // 指定編碼格式
  hints.put(EncodeHintType.CHARACTER_SET, "GBK");
  // 設置邊框 0 條碼周圍不留空白邊框
  hints.put(EncodeHintType.MARGIN, 0);
  try {
   BitMatrix bitMatrix = new MultiFormatWriter().encode(str,
     BarcodeFormat.QR_CODE, 100, 100, hints);//QR_CODE   DATA_MATRIX
   MatrixToImageWriter.writeToFile(bitMatrix, "png", outputFile);
  } catch (Exception e) {
   throw new AppException("生成二維碼失敗！");
  }
  return outputFile;
}

/**解析infoMap，將map的key與value連接，格式如 key1：value1 | key2：value2。
* @param infoMap
* @return
*/
public String getInfoMapToString(Map<String, Object> infoMap){
  String str = "";
  Set<String> keySet = infoMap.keySet();
  for(Iterator<String> it=keySet.iterator();it.hasNext();){
   String key = it.next();
   str += key + ":";
   String value = (String)infoMap.get(key);
   str += value + "|";
  }
  str = str.substring(0,str.length()-1);
  return str;
}

/**
* 創建二維碼的輸出目錄
* */
private void createDir(String path) {
  File dir = new File(path);
  if (!dir.exists()) {
   if (!dir.mkdirs()) {
    throw new AppException("tyjcComm05BO.createDir(" + path
      + "),創建目錄失敗...");
   }
  }
}

}