微信公众号网页授权记录

记录一下最近做的一个微信网页授权的例子

大概思路是，生成一个二维码，用户扫描二维码点击确认，进行网页授权。

首先申请一个测试公众号

https://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login

扫描二维码，就可以申请一个测试公众号，然后我们需要接口配置信息的地方修改成我们自己的服务器信息，如果没有服务器的话，就使用ngrok做一个内网穿透

然后在配置成内网穿透后的地址

在网页授权的地方修改一下二级域名

配置工作做好之后，我们只需要根据微信开发文档，来一步步获取我们需要的信息就可以了

直接贴上所有代码

import com.shanpu.wxsignin.constant.WxConstants;
import com.shanpu.wxsignin.utils.QRCodeUtil;
import com.shanpu.wxsignin.utils.Sha1Utils;
import net.sf.json.JSONObject;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.*;
import java.util.stream.Collector;
import java.util.stream.Collectors;/*** @Classname WxSign* @Description TODO* @Date 2019/11/29 13:36* @Created by lijinghua*/
@RequestMapping(value="/wx")
@RestController
public class WxSign {private static final String TOKEN = "test";@GetMapping("/init")public String wxSign(String redirectUri, String openId, HttpServletResponse response, HttpServletRequest request ){String echostr = request.getParameter("echostr");System.out.println(echostr);return echostr;}/*** @Description 生成有回调地址的二维码* @param* @return java.lang.String* @Date 2019/12/2 14:09* @user*/@GetMapping("/getQRCode")public String getQRCode()throws Exception{String redirect_uri = WxConstants.REDIRECT_URI;String appid = WxConstants.APPID;String url = WxConstants.GET_CODE_URL.replace("APPID", appid).replace("REDIRECTURI", URLEncoder.encode(redirect_uri,"UTF-8"));String imgUrl = "D:/qrCode/dog";String returnUrl = "";try{returnUrl = QRCodeUtil.encode(url,imgUrl,true);}catch(Exception e){e.printStackTrace();}return returnUrl;}@GetMapping("/login")public String login(HttpServletResponse response, HttpServletRequest request )throws Exception{System.out.println("/login");String code = request.getParameter("code");Map<String, String> tokenAndOpenId = getAccessTokenAndOpenId(code);getUserInfo(tokenAndOpenId);return "";}private void getUserInfo(Map<String, String> tokenAndOpenId) throws Exception {String userUrl = WxConstants.USERINFO_URL.replace("ACCESS_TOKEN", tokenAndOpenId.get("accessToken")).replace("OPENID", tokenAndOpenId.get("openid"));JSONObject json = httpClient("GET", userUrl);System.out.println(json);}/*** @Description 通过code得到access_token* @param code* @return java.lang.String* @Date 2019/12/2 16:01* @user*/public Map<String,String> getAccessTokenAndOpenId(String code)throws Exception{//获取codeSystem.out.println(code);String appid = WxConstants.APPID;String appsecrt = WxConstants.APPSECRT;//通过code获取access_tokenString accessTokenUrl = WxConstants.ACCESS_TOKEN_URL.replace("CODE",code).replace("APPID",appid).replace("SECRET",appsecrt);// 发起GET请求获取access_tokenStringBuffer sb = new StringBuffer(accessTokenUrl);// 发送请求JSONObject json = httpClient("GET", sb.toString());Map<String,String> resultMap = new HashMap<>(2);String accessToken = json.getString("access_token");String openid = json.getString("openid");resultMap.put("accessToken",accessToken);resultMap.put("openid",openid);return resultMap;}public static void main(String[] args) {String redirect_uri = WxConstants.REDIRECT_URI;String appid = WxConstants.APPID;String url = WxConstants.GET_CODE_URL.replace("APPID", appid).replace("REDIRECTURI", redirect_uri);String imgUrl = "D:/qrCode/dog";try{String returnUrl = QRCodeUtil.encode(url,imgUrl,true);System.out.println(returnUrl);}catch(Exception e){e.printStackTrace();}}/*** @Description 发起http请求* @param requestMethod, requestUrl* @return net.sf.json.JSONObject* @Date 2019/12/2 16:29* @user*/public JSONObject httpClient(String requestMethod,String requestUrl)throws Exception{URL url = new URL(requestUrl);HttpURLConnection connection = (HttpURLConnection) url.openConnection();connection.setRequestMethod(requestMethod);BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));JSONObject json = new JSONObject();// 返回结果while ((in.read()) != -1) {String jsonMessage = "{"+in.readLine();json=JSONObject.fromObject(jsonMessage);if (null != json) {json.toString();}}in.close();System.out.println(json);return json;}
}

public class WxConstants {/*** //appId*/public static final String APPID = "";/*** appsecret*/public static final String APPSECRT = "";/*** //本地微信回调地址*/public static final String REDIRECT_URI = "http://93419d0b.ngrok.io/wx/login";/*** //获取code*/public static final String GET_CODE_URL = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect_uri=REDIRECTURI&response_type=code&scope=snsapi_userinfo&state=123456789#wechat_redirect";/*** //获取access_token的URL*/public static final String ACCESS_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";/*** //获取微信用户信息*/public static final String USERINFO_URL = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";/*** //不通过code获取access_token的URL*/public static final String NO_CODE_ACCESS_TOKEN_URL ="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";}

/*** @Classname WxUser* @Description TODO* @Date 2019/12/2 16:15* @Created by lijinghua*/
public class WxUser {private String openid;private String nickname;private String sex;private String province;private String city;private String country;private String headimgurl;private String unionid;
}

package com.shanpu.wxsignin.utils;import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Random;/*** @Classname QRCodeUtil* @Description TODO* @Date 2019/11/29 15:41* @Created by lijinghua*/
public class QRCodeUtil {private static final String CHARSET = "utf-8";private static final String FORMAT_NAME = "JPG";// 二维码尺寸private static final int QRCODE_SIZE = 300;// LOGO宽度private static final int WIDTH = 60;// LOGO高度private static final int HEIGHT = 60;/*** 生成二维码* @param content   源内容* @param imgPath    生成二维码保存的路径* @param needCompress    是否要压缩* @return     返回二维码图片* @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);hints.put(EncodeHintType.CHARACTER_SET, CHARSET);hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE,hints);int width = bitMatrix.getWidth();int height = bitMatrix.getHeight();BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);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)) {return image;}// 插入图片QRCodeUtil.insertImage(image, imgPath, needCompress);return image;}/*** 在生成的二维码中插入图片* @param source* @param imgPath* @param needCompress* @throws Exception*/private static void insertImage(BufferedImage source, String imgPath, boolean needCompress) throws Exception {File file = new File(imgPath);if (!file.exists()) {System.err.println("" + imgPath + "   该文件不存在！");return;}Image src = ImageIO.read(new File(imgPath));int width = src.getWidth(null);int height = src.getHeight(null);if (needCompress) { // 压缩LOGOif (width > WIDTH) {width = WIDTH;}if (height > HEIGHT) {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LOGOGraphics2D 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();}/*** 生成带logo二维码，并保存到磁盘* @param content* @param imgPath    logo图片* @param destPath* @param needCompress* @throws Exception*/public static String encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {BufferedImage image = QRCodeUtil.createImage(content, imgPath, needCompress);mkdirs(destPath);/*** 生成随机文件名*/String file = new Random().nextInt(99999999) + ".jpg";ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));return imgPath+file;}public static void mkdirs(String destPath) {File file = new File(destPath);// 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)if (!file.exists() && !file.isDirectory()) {file.mkdirs();}}public static void encode(String content, String imgPath, String destPath) throws Exception {QRCodeUtil.encode(content, imgPath, destPath, false);}public static String encode(String content, String destPath, boolean needCompress) throws Exception {return QRCodeUtil.encode(content, null, destPath, needCompress);}public static void encode(String content, String destPath) throws Exception {QRCodeUtil.encode(content, null, destPath, false);}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);}public static void encode(String content, OutputStream output) throws Exception {QRCodeUtil.encode(content, null, output, false);}/*** 从二维码中，解析数据* @param file 二维码图片文件* @return    返回从二维码中解析到的数据值* @throws Exception*/public static String decode(File file) throws Exception {BufferedImage image;image = ImageIO.read(file);if (image == null) {return null;}BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));Result result;Hashtable hints = new Hashtable();hints.put(DecodeHintType.CHARACTER_SET, CHARSET);result = new MultiFormatReader().decode(bitmap, hints);String resultStr = result.getText();return resultStr;}public static String decode(String path) throws Exception {return QRCodeUtil.decode(new File(path));}}

package com.shanpu.wxsignin.utils;import com.google.zxing.LuminanceSource;import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;/*** @Classname BufferedImageLuminanceSource* @Description TODO* @Date 2019/11/29 15:43* @Created by lijinghua*/
public class BufferedImageLuminanceSource extends LuminanceSource{private final BufferedImage image;private final int left;private final int top;public BufferedImageLuminanceSource(BufferedImage image) {this(image, 0, 0, image.getWidth(), image.getHeight());}public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {super(width, height);int sourceWidth = image.getWidth();int sourceHeight = image.getHeight();if (left + width > sourceWidth || top + height > sourceHeight) {throw new IllegalArgumentException("Crop rectangle does not fit within image data.");}for (int y = top; y < top + height; y++) {for (int x = left; x < left + width; x++) {if ((image.getRGB(x, y) & 0xFF000000) == 0) {image.setRGB(x, y, 0xFFFFFFFF); // = white}}}this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);this.image.getGraphics().drawImage(image, 0, 0, null);this.left = left;this.top = top;}@Overridepublic byte[] getRow(int y, byte[] row) {if (y < 0 || y >= getHeight()) {throw new IllegalArgumentException("Requested row is outside the image: " + y);}int width = getWidth();if (row == null || row.length < width) {row = new byte[width];}image.getRaster().getDataElements(left, top + y, width, 1, row);return row;}@Overridepublic byte[] getMatrix() {int width = getWidth();int height = getHeight();int area = width * height;byte[] matrix = new byte[area];image.getRaster().getDataElements(left, top, width, height, matrix);return matrix;}@Overridepublic boolean isCropSupported() {return true;}public LuminanceSource crop(int left, int top, int width, int height) {return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);}@Overridepublic boolean isRotateSupported() {return true;}@Overridepublic LuminanceSource rotateCounterClockwise() {int sourceWidth = image.getWidth();int sourceHeight = image.getHeight();AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);Graphics2D g = rotatedImage.createGraphics();g.drawImage(image, transform, null);g.dispose();int width = getWidth();return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);}}

生产二维码使用的jar包

<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.3.0</version></dependency><dependency><groupId>net.sf.json-lib</groupId><artifactId>json-lib</artifactId><version>2.4</version><classifier>jdk15</classifier></dependency>

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