关于微信二维码支付的一点点总结.如上一个博客所说,开始开发前需要前往官网进行一系列的接入,从而得到相关的appid,密钥.
本次的开发中,使用谷歌zxing实现将支付链接字符串转为二维码.附上相关依赖:
<!-- 谷歌生成二维码 -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.3.0</version>
</dependency>
1.PayUtils工具类
和之前微信H5支付类似,只是将其中的支付类型trade_type修改为NATIVE,代码如下:
public class PayUtils {
/**
* 公众号AppId
*/
public static final String APP_ID = "xxx";
/**
* 公众号AppSecret
*/
public static final String APP_SECRET = "xxx";
/**
* 微信支付商户号
*/
public static final String MCH_ID = "xxx";
/**
* 微信支付API秘钥
*/
public static final String KEY = "xxx";
/**
* 回调域名
*/
public static final String REDIRECT_DOMAIN = "http://xxx.com";
private static final WxMpService wxMpService = new WxMpServiceImpl();
private static final WxPayService wxPayService = new WxPayServiceImpl();
static {
WxMpInMemoryConfigStorage config = new WxMpInMemoryConfigStorage();
config.setAppId(APP_ID);
config.setSecret(APP_SECRET);
wxMpService.setWxMpConfigStorage(config);
WxPayConfig payConfig = new WxPayConfig();
payConfig.setAppId(APP_ID);
payConfig.setMchId(MCH_ID);
payConfig.setMchKey(KEY);
payConfig.setSignType(WxPayConstants.SignType.MD5);
//二维码支付
payConfig.setTradeType("NATIVE");
payConfig.setNotifyUrl(REDIRECT_DOMAIN + "/pay/success");
wxPayService.setConfig(payConfig);
}
public static WxMpService wxMpService() {
return wxMpService;
}
public static WxPayService wxPayService() {
return wxPayService;
}
}
需要注意的是,在接下来的controller设计中,tradeType值为NATIVE时,微信统一下单接口的prodectId是必填的.
2.后台controller
/**
* 首页
*/
@RequestMapping(value = "/index")
public String index(Model model) {
String qrcodePayUrl = PayUtils.REDIRECT_DOMAIN+"/pay/qrcodePay";
model.addAttribute("qrcodePay",qrcodePayUrl);
String downloadQRCode = PayUtils.REDIRECT_DOMAIN+"/pay/downloadQRCode";
model.addAttribute("downloadQRCode",downloadQRCode);
return "index";
}
/**
* 点击链接跳转显示支付二维码
* @param request
* @param response
* @param model
*/
@RequestMapping(value = "/qrcodePay")
public void qrcodePay(HttpServletRequest request,HttpServletResponse response,Model model){
try {
//统一订单必填参数
WxPayUnifiedOrderRequest orderRequest = new WxPayUnifiedOrderRequest();
orderRequest.setBody("微信二维码支付测试");
orderRequest.setOutTradeNo(UUID.randomUUID().toString().replace("-", ""));
orderRequest.setTotalFee(1);
//用户ip
orderRequest.setSpbillCreateIp(getRealIp(request));
//商品ID 二维码支付时必填
orderRequest.setProductId(UUID.randomUUID().toString().replace("-", ""));
//签名创建
Map<String,String> packageParams = new HashMap<>();
packageParams.put("appid", PayUtils.APP_ID);
packageParams.put("mch_id", PayUtils.MCH_ID);
packageParams.put("nonce_str", UUID.randomUUID().toString().replace("-", ""));
packageParams.put("signType",orderRequest.getSignType());
String sign = SignUtils.createSign(packageParams,"MD5", PayUtils.KEY,false);
orderRequest.setSign(sign);
WxPayNativeOrderResult orderResult = PayUtils.wxPayService().createOrder(orderRequest);
String codeUrl = orderResult.getCodeUrl();
QRcodeImageUtil.encode(codeUrl,300,300,getIconUrl(),null,false,response);
} catch (WxPayException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 直接在页面上显示支付二维码
* @param request
* @return
*/
@RequestMapping("/downloadQRCode")
public ResponseEntity<byte[]> downloadQRCode(HttpServletRequest request){
try{
//统一订单必填参数
WxPayUnifiedOrderRequest orderRequest = new WxPayUnifiedOrderRequest();
orderRequest.setBody("微信二维码支付测试");
orderRequest.setOutTradeNo(UUID.randomUUID().toString().replace("-", ""));
orderRequest.setTotalFee(1);
//用户ip
orderRequest.setSpbillCreateIp(getRealIp(request));
//商品ID 二维码支付时必填
orderRequest.setProductId(UUID.randomUUID().toString().replace("-", ""));
//签名创建
Map<String,String> packageParams = new HashMap<>();
packageParams.put("appid", PayUtils.APP_ID);
packageParams.put("mch_id", PayUtils.MCH_ID);
packageParams.put("nonce_str", UUID.randomUUID().toString().replace("-", ""));
packageParams.put("signType",orderRequest.getSignType());
String sign = SignUtils.createSign(packageParams,"MD5", PayUtils.KEY,false);
orderRequest.setSign(sign);
WxPayNativeOrderResult orderResult = PayUtils.wxPayService().createOrder(orderRequest);
String codeUrl = orderResult.getCodeUrl();
return QRcodeImageUtil.getResponseEntity(codeUrl,300,300,"png",getIconUrl());
}catch (Exception e){
e.printStackTrace();
}
return null;
}
//获取真实ip地址 通过阿帕奇代理的也能获取到真实ip
private static String getRealIp(HttpServletRequest request){
String ip = request.getHeader("x-forwarded-for");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
ip = request.getRemoteAddr();
}
return ip;
}
/**
* 获取二维码中心图标再项目中的地址
* @return
*/
private static String getIconUrl(){
ClassLoader classLoader = PayUtils.class.getClassLoader();
URL resource = classLoader.getResource("");
String icon = resource.getPath();
//target/classes/下的图片无法使用,所以将其截取掉,并自主拼接好src下的图片位置
icon = icon.substring(0,icon.length()-15);
icon = icon +"/src/main/resources/public/image/bg.jpg";
return icon;
}
这里的getIconUrl()是获取项目中图片的方法,之前通过获取classes下的图片,发现不能嵌套到二维码中,具体原因还不清楚,若有大神知道,望指点.
3.zxing工具类
关于zxing的使用方法,我也是从别的博主那找来的方法,对其中的方法进行了一点点修改,还没有进行总结归纳,不过忘记那位博主的地址了=_=...直接附代码吧.
package com.novice.project.wxpay.utils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public class QRcodeImageUtil {
/**
* 图片格式定义
* @value Array
*/
private static String[] IMAGE_TYPE = {"BMP", "bmp", "jpg", "JPG", "wbmp", "jpeg", "png", "PNG", "JPEG", "WBMP", "GIF", "gif","ICON","icon"};
/**
* 二维码宽度
*/
public static final int WIDTH = 260;
/**
* 二维码高度
*/
public static final int HEIGHT = 260;
/**
* 图标宽度
*/
private static final int IMAGE_WIDTH = 68;
/**
* 图标高度
*/
private static final int IMAGE_HEIGHT = 68;
/**
* 底图大小【正方形】
*/
private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;
/**
* 底图边框
*/
private static final int FRAME_WIDTH = 5;
/**
* 二维码写码器
*/
private static MultiFormatWriter mutiWriter = new MultiFormatWriter();
/**
* 二维码生成-方法入口
* @param content 内容
* @param width 宽度
* @param height 高度
* @param iconImagePath 图标原路径
* @param qrcodeImagePath 二维码存放路径
* @param hasFiller
* 比例不对时是否需要补白：true为补白; false为不补白
* @return
* 成功：返回输出图片绝对路径；失败：返回null
*/
public static String encode(String content, int width, int height,
String iconImagePath, String qrcodeImagePath, boolean hasFiller, HttpServletResponse response) {
try {
/**
* 图标格式校验
*/
File icon = new File(iconImagePath);
if(!icon.exists()){
System.err.println("系统找不到图标所在文件 ！");
return null;
}
String iconFileName = icon.getName();
// 得到上传文件的扩展名
String fileExtName = iconFileName.substring(iconFileName.lastIndexOf(".") + 1);
if(!checkIMGType(fileExtName)){
System.err.println("图标格式有误 ！");
return null;
}
if(width<260||height<260){
width = QRcodeImageUtil.WIDTH;
height = QRcodeImageUtil.HEIGHT;
}
if(qrcodeImagePath!=null){
ImageIO.write(genBarcode(content, width, height, iconImagePath,hasFiller),
"png", new File(qrcodeImagePath));
System.err.println("二维码已生成 "+qrcodeImagePath);
}else{
ImageIO.write(genBarcode(content, width, height, iconImagePath, hasFiller),
"png", response.getOutputStream());
}
return qrcodeImagePath;
} catch (IOException e) {
System.err.println("图片读取异常 ： "+e.getMessage());
} catch (WriterException e) {
System.err.println("图片输出异常 ："+e.getMessage());
}
return null;
}
/**
* 图片处理方法
* @param content
* @param width
* @param height
* @param iconImagePath
* @param hasFiller
* 比例不对时是否需要补白：true为补白; false为不补白;
* @return
* @throws WriterException
* @throws IOException
*/
private static BufferedImage genBarcode(String content, int width,
int height, String iconImagePath,boolean hasFiller) throws WriterException,
IOException {
// 读取源图像
BufferedImage scaleImage = scale(iconImagePath, IMAGE_WIDTH,
IMAGE_HEIGHT, hasFiller);
int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];
for (int i = 0; i < scaleImage.getWidth(); i++) {
for (int j = 0; j < scaleImage.getHeight(); j++) {
srcPixels[i][j] = scaleImage.getRGB(i, j);
}
}
Map<EncodeHintType, Object> hint = new HashMap<EncodeHintType, Object>();
hint.put(EncodeHintType.CHARACTER_SET, "utf-8");
hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 生成二维码
BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,
width, height, hint);
// 二维矩阵转为一维像素数组
int halfW = matrix.getWidth() / 2;
int halfH = matrix.getHeight() / 2;
int[] pixels = new int[width * height];
for (int y = 0; y < matrix.getHeight(); y++) {
for (int x = 0; x < matrix.getWidth(); x++) {
// 读取图片
if (x > halfW - IMAGE_HALF_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH
&& y < halfH + IMAGE_HALF_WIDTH) {
pixels[y * width + x] = srcPixels[x - halfW
+ IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];
}
// 在图片四周形成边框
else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
- IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)) {
pixels[y * width + x] = 0xfffffff;
} else {
// 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色；
pixels[y * width + x] = matrix.get(x, y) ? 0xff000000
: 0xfffffff;
}
}
}
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
image.getRaster().setDataElements(0, 0, width, height, pixels);
return image;
}
/**
* 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标
*
* @param iconImagePath
* 小图标源文件地址
* @param height
* 目标高度
* @param width
* 目标宽度
* @param hasFiller
* 比例不对时是否需要补白：true为补白; false为不补白;
* @throws IOException
*/
private static BufferedImage scale(String iconImagePath, int height,
int width, boolean hasFiller) throws IOException {
double ratio = 0.0; // 缩放比例
File file = new File(iconImagePath);
BufferedImage srcImage = ImageIO.read(file);
Image destImage = srcImage.getScaledInstance(width, height,
BufferedImage.SCALE_SMOOTH);
// 计算比例
if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {
if (srcImage.getHeight() > srcImage.getWidth()) {
ratio = (new Integer(height)).doubleValue()
/ srcImage.getHeight();
} else {
ratio = (new Integer(width)).doubleValue()
/ srcImage.getWidth();
}
AffineTransformOp op = new AffineTransformOp(
AffineTransform.getScaleInstance(ratio, ratio), null);
destImage = op.filter(srcImage, null);
}
if (hasFiller) {// 补白
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D graphic = image.createGraphics();
graphic.setColor(Color.white);
graphic.fillRect(0, 0, width, height);
if (width == destImage.getWidth(null))
graphic.drawImage(destImage, 0,
(height - destImage.getHeight(null)) / 2,
destImage.getWidth(null), destImage.getHeight(null),
Color.white, null);
else
graphic.drawImage(destImage,
(width - destImage.getWidth(null)) / 2, 0,
destImage.getWidth(null), destImage.getHeight(null),
Color.white, null);
graphic.dispose();
destImage = image;
System.err.println("INFO 图标补白已完成 ");
}
return (BufferedImage) destImage;
}
/**
* 图片格式校验
* @param fileExtName
* @return
*/
private static boolean checkIMGType(String fileExtName){
boolean flag = false;
for (String type : IMAGE_TYPE) {
//-- 图片格式正确
if(type.toLowerCase().equals(fileExtName.toLowerCase())){
flag = true;
break;
}
}
//------------图片格式校验结束
return flag;
}
/**
* 生成并下载二维码
* @param content
* @param width
* @param height
* @param format
* @param imgPath
* @return
*/
public static ResponseEntity<byte[]> getResponseEntity(String content,int width,int height,String format,String imgPath){
try {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageIO.write(genBarcode(content,width,height,imgPath,false),format,outputStream);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
return new ResponseEntity<byte[]>(outputStream.toByteArray(),headers, HttpStatus.CREATED);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
4.前台显示
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<meta name="x5-orientation" content="portrait">
<title>微信二维码支付测试</title>
</head>
<body>
<div id="container">
<a th:href="${qrcodePay}" style="font-size:40px;">
二维码支付
</a><br>
<img th:src="${downloadQRCode}">
</div>
</body>
</html>
前台使用thymeleaf进行前后数据绑定,你也可以使用自己的方式.这里仅仅是一个参考.微信的公众号/H5/二维码支付demo也会提供.
