Java 生成二维码的工具资料整理

import com.swetake.util.Qrcode;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

/**
 * Created with IntelliJ IDEA.
 * Date: 10/9/13
 * Time: 11:31 AM
 */
public class QRCodeTest {


 private static int DEFAULT_WIDTH;
 private static int UNIT_WIDTH = 10;

 public static void main(String args[]) throws Exception{
 createImg();

 }

 public static void createImg(){
 Qrcode qrcode=new Qrcode();
 //错误修正容量 
 //L水平 7%的字码可被修正
 //M水平 15%的字码可被修正
 //Q水平 25%的字码可被修正
 //H水平 30%的字码可被修正
 //QR码有容错能力，QR码图形如果有破损，仍然可以被机器读取内容，最高可以到7%~30%面积破损仍可被读取。
 //相对而言，容错率愈高，QR码图形面积愈大。所以一般折衷使用15%容错能力。
 qrcode.setQrcodeErrorCorrect('M');/* L','M','Q','H' */
 qrcode.setQrcodeEncodeMode('B');/* "N","A" or other */
 qrcode.setQrcodeVersion(3);/* 0-20 */

 String testString = "5677777ghjjjjj";

 byte[] buff = null;
 try {
 buff = testString.getBytes("utf-8");
 } catch (UnsupportedEncodingException e) {
 e.printStackTrace();
 }
 boolean[][] bRect = qrcode.calQrcode(buff);
 DEFAULT_WIDTH = bRect.length * UNIT_WIDTH;

 BufferedImage bi = new BufferedImage(DEFAULT_WIDTH, DEFAULT_WIDTH, BufferedImage.TYPE_INT_RGB);
// int unitWidth = DEFAULT_WIDTH / bRect.length;

// createGraphics
 Graphics2D g = bi.createGraphics();

// set background
 g.setBackground(Color.WHITE);
 g.clearRect(0, 0, DEFAULT_WIDTH, DEFAULT_WIDTH);
 g.setColor(Color.BLACK);

 if (buff.length>0 && buff.length <123){

 for (int i=0;i<bRect.length;i++){

 for (int j=0;j<bRect.length;j++){
 if (bRect[j][i]) {
 g.fillRect(j*UNIT_WIDTH, i*UNIT_WIDTH, UNIT_WIDTH-1, UNIT_WIDTH-1);
 }
 }

 }
 }

 g.dispose();
 bi.flush();

 String FilePath="QRCode.png";
 File f = new File(FilePath);

 try {
 ImageIO.write(bi, "png", f);
 } catch (IOException e) {
 e.printStackTrace();
 }
 System.out.println("Create QRCode finished!");
 }
}

import java.io.File;
import java.util.Hashtable;

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.QRCodeWriter;



public class QRCodeEvents {
 
 public static void main(String []args)throws Exception{
 String text = "你好";
 int width = 100;
 int height = 100;
 String format = "png";
 Hashtable hints= new Hashtable();
 hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
 BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height,hints);
 File outputFile = new File("new.png");
 MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);
 
 }
}