(二维码处理--1)java根据网络头像和关键信息生成(微信类似二维码)--包含获取网络图片或文件流进行处理，
maven依赖
com.google.zxing
core
3.4.0
这里做了一下头像图片的判断，然后处理图片合成。
工具类
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.IOException;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;
import javax.imageio.ImageIO;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
/**
* 提供二维码生成和解析工具类
* @author Administrator
*
*/
public class QRCodeUtil {
private static final String CHARSET = "utf-8";
private static final String FORMAT_NAME = "JPG";
private static final int QRCODE_SIZE = 300; // 二维码尺寸，宽度和高度均是300
private static final int WIDTH = 80; //LOGO宽度
private static final int HEIGHT = 80; //LOGO高度
/**
* 生成二维码的方法
* @param content 目标url
* @param imgPath logo图片地址
* @param needCompress 是否压缩logo
* @return 二维码图片
* @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);//指定二维码的纠错等级为高级
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);//指定字符编码为“utf-8”
hints.put(EncodeHintType.MARGIN, 1); //设置图片的边距
//参数1：内容，目标url,参数2：固定写法，参数3：二维码的宽度，参数4：二维码的高度，参数5：二维码属性设置
BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
int width = bitMatrix.getWidth();//二维码的宽度
int height = bitMatrix.getHeight();//二维码的高度
BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);//生成的二维码image
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)) {//logo图片地址为null或空时
return image; //只返回二维码图片，无中间的logo
}
// 插入logo图片 参数1：二维码图片，参数2：logo图片地址，参数3：压缩图片
QRCodeUtil.insertImage(image, imgPath, needCompress);
return image;
}
/**
* 插入logo图片
* @param source 二维码图片
* @param imgPath LOGO图片地址
* @param needCompress 是否压缩
* @throws Exception
*/
private static void insertImage(BufferedImage source, String imgPath,boolean needCompress) throws Exception {
File file = new File(imgPath);//logo图片地址放入文件
Image src;
if (!file.exists()) {
//通过网络路径获取
InputStream inputStream=getImageStream(imgPath);
src = ImageIO.read(inputStream);
}else {
//本地路径获取
src = ImageIO.read(new File(imgPath));
}
int width = src.getWidth(null);
int height = src.getHeight(null);
if (needCompress) { // 压缩LOGO
if (width > WIDTH) { //如果上传logo宽 >60
width = WIDTH;
}
if (height > HEIGHT) { //如果上传logo高>60
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); // 绘制缩小后的图
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();
}
/**
* 生成二维码(内嵌LOGO)
* @param content 内容
* @param imgPath logo地址
* @param destPath 存放目录
* @param needCompress 是否压缩logo
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress); //生成二维码
mkdirs(destPath);
String file = new Random().nextInt(99999) + ".jpg";
ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
}
/**
* 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
* @param destPath 存放目录
*/
public static void mkdirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* 生成二维码(内嵌LOGO),没有压缩
*
* @param content 内容
* @param imgPath LOGO地址
* @param destPath 存储地址
* @throws Exception
*/
public static void encode(String content, String imgPath, String destPath)throws Exception {
QRCodeUtil.encode(content, imgPath, destPath, false);
}
/**
* 生成二维码，无内嵌logo
*
* @param content 内容
* @param destPath 存储地址
* @param needCompress 是否压缩LOGO
* @throws Exception
*/
public static void encode(String content, String destPath,boolean needCompress) throws Exception {
QRCodeUtil.encode(content, null, destPath, needCompress);
}
/**
* 生成二维码
*
* @param content 内容
* @param destPath 存储地址
* @throws Exception
*/
public static void encode(String content, String destPath) throws Exception {
QRCodeUtil.encode(content, null, destPath, false);
}
/**
* 生成二维码(内嵌LOGO)
*
* @param content 内容
* @param imgPath LOGO地址
* @param output 输出流
* @param needCompress 是否压缩LOGO
* @throws Exception
*/
public static void encode(String content, String imgPath,OutputStream output, boolean needCompress) throws Exception {
BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress);
ImageIO.write(image, FORMAT_NAME, output);
}
/**
* 生成二维码
*
* @param content 内容
* @param output 输出流
* @throws Exception
*/
public static void encode(String content, OutputStream output)throws Exception {
QRCodeUtil.encode(content, null, output, false);
}
/**
* 获取网络图片流
*
* @param url
* @return
*/
public static InputStream getImageStream(String url) {
try {
HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
connection.setReadTimeout(5000);
connection.setConnectTimeout(5000);
connection.setRequestMethod("GET");
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStream inputStream = connection.getInputStream();
return inputStream;
}
} catch (IOException e) {
System.out.println("获取网络图片出现异常，图片路径为：" + url);
e.printStackTrace();
}
return null;
}
public static void main(String[] args) throws Exception{
BufferedImage ti=createImage("xh6lSOzYdIMVanArR9AY0","https://b-ssl.duitang.com/uploads/item/201706/27/20170627012435_mJLiX.thumb.700_0.jpeg",true);
//输出文件
File file = new File("E:\\123.jpg");
ImageIO.write(ti, "jpg", file);
}
}
效果：
