Java微信公众号--3--网页授权的一些问题

ゞ浴缸里的玫瑰 2022-06-03 00:30 223阅读 0赞

前面在写微信公众号开发的时候，我一直有提到一个问题，那就是域名的问题，然后在补充下一个问题是，如果你看了 爱慕课上面讲的网页授权还是发现成功不了，那就可能是HTTPS请求的方式有问题了

目前以测试号为例

这个域名相对于来说就没有那么多的要求，就会简单很多  
![这里写图片描述][SouthEast]

而关于这个域名，就不要出现二级域名的情况，避免跨域请求的出现；  
![这里写图片描述][SouthEast 1]

如果你的域名不对的话可能会出现的问题：[微信公众号—-多次请求，状态码（40001）][-_40001]

近段时间通过慕课的伙伴还发现一个这种问题，就是当你和慕课上面的代码一模一样的话，可能这个问题也会存在，就是[微信公众号—-多次请求，状态码（40001）][-_40001]  
debug了下发现问题出现在HTTPS请求这边，可以用这篇文章中HTTPS请求进行代替慕课网中的请求：[Java—发送HTTPS请求][Java_HTTPS]

下面我贴一下我的代码：  
接口配置信息的URL：花生壳  
网页授权回调页面域名：NATAPP  
[jar包][jar]

代码结构：  
![这里写图片描述][SouthEast 2]

util：  
util里面的代码：[Java—发送HTTPS请求][Java_HTTPS]这里面的是一样的

pojo：  
Info.java

package pojo;
    
    import java.util.List;
    
    /** * 通过网页授权获取用户信息 * Created by admin on 2017/11/15. */
    public class Info { 
        // 用户标识
        private String openid;
        // 用户昵称
        private String nickname;
        // 性别（1是男性，2是女性，0是未知）
        private int sex;
        // 国家
        private String country;
        // 省份
        private String province;
        // 城市
        private String city;
        // 用户头像链接
        private String headimgurl;
        // 用户特权信息
        private List<String> privilege;
    
        public String getOpenid() {
            return openid;
        }
    
        public void setOpenid(String openid) {
            this.openid = openid;
        }
    
        public String getNickname() {
            return nickname;
        }
    
        public void setNickname(String nickname) {
            this.nickname = nickname;
        }
    
        public int getSex() {
            return sex;
        }
    
        public void setSex(int sex) {
            this.sex = sex;
        }
    
        public String getCountry() {
            return country;
        }
    
        public void setCountry(String country) {
            this.country = country;
        }
    
        public String getProvince() {
            return province;
        }
    
        public void setProvince(String province) {
            this.province = province;
        }
    
        public String getCity() {
            return city;
        }
    
        public void setCity(String city) {
            this.city = city;
        }
    
        public String getHeadimgurl() {
            return headimgurl;
        }
    
        public void setHeadimgurl(String headimgurl) {
            this.headimgurl = headimgurl;
        }
    
        public List<String> getPrivilege() {
            return privilege;
        }
    
        public void setPrivilege(List<String> privilege) {
            this.privilege = privilege;
        }
    
        @Override
        public String toString() {
            return "Info{" +
                    "openid='" + openid + '\'' +
                    ", nickname='" + nickname + '\'' +
                    ", sex=" + sex +
                    ", country='" + country + '\'' +
                    ", province='" + province + '\'' +
                    ", city='" + city + '\'' +
                    ", headimgurl='" + headimgurl + '\'' +
                    ", privilege=" + privilege +
                    '}';
        }
    }

Token.java

package pojo;
    
    /** * 网页授权信息 * Created by admin on 2017/11/15. */
    public class Token { 
        // 网页授权接口调用凭证
        private String access_token;
        // 凭证有效时长
        private int expires_in;
        // 用于刷新凭证
        private String refresh_token;
        // 用户标识
        private String openid;
        // 用户授权作用域
        private String scope;
    
        public String getAccess_token() {
            return access_token;
        }
    
        public void setAccess_token(String access_token) {
            this.access_token = access_token;
        }
    
        public int getExpires_in() {
            return expires_in;
        }
    
        public void setExpires_in(int expires_in) {
            this.expires_in = expires_in;
        }
    
        public String getRefresh_token() {
            return refresh_token;
        }
    
        public void setRefresh_token(String refresh_token) {
            this.refresh_token = refresh_token;
        }
    
        public String getOpenid() {
            return openid;
        }
    
        public void setOpenid(String openid) {
            this.openid = openid;
        }
    
        public String getScope() {
            return scope;
        }
    
        public void setScope(String scope) {
            this.scope = scope;
        }
    
        @Override
        public String toString() {
            return "Token{" +
                    "access_token='" + access_token + '\'' +
                    ", expires_in=" + expires_in +
                    ", refresh_token='" + refresh_token + '\'' +
                    ", openid='" + openid + '\'' +
                    ", scope='" + scope + '\'' +
                    '}';
        }
    }

servlet:  
BaseServlet.java

package servlet;
    
    import com.google.gson.Gson;
    
    import javax.servlet.http.HttpServlet;
    
    /** * Created by admin on 2017/12/7. */
    public class BaseServlet extends HttpServlet { 
        private String APPID = "wx2e****a800****";
        private String APPSECET = "4****34****e****0c2****4f5****";
    
        Gson gson = new Gson();
    
        public String getAPPID() {
            return APPID;
        }
    
        public String getAPPSECET() {
            return APPSECET;
        }
    }

LoginServlet.java

package servlet;
    
    import java.io.IOException;
    import java.net.URLEncoder;
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    @WebServlet("/wxLogin")
    public class LoginServlet extends BaseServlet{ 
    
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {
                    String backUrl = "http://dqvzxy.natappfree.cc/WeixinAuth/callBack";
                    String url="https://open.weixin.qq.com/connect/oauth2/authorize?appid="+getAPPID()
                            + "&redirect_uri="+URLEncoder.encode(backUrl)
                            + "&response_type=code"
                            + "&scope=snsapi_userinfo"
                            + "&state=STATE#wechat_redirect";
                    resp.sendRedirect(url);
        }
    }

CallBackServlet.java

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */
    package servlet;
    
    import java.io.IOException;
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import pojo.Info;
    import pojo.Token;
    import util.HttpsREQUEST;
    
    
    @WebServlet("/callBack")
    public class CallBackServlet extends BaseServlet { 
    
        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            String code = req.getParameter("code");
            System.out.println("....." + code);
    
    // 页面授权第二步，通过code换取 access_token openid
            String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + getAPPID()
                    + "&secret=" + getAPPSECET()
                    + "&code=" + code
                    + "&grant_type=authorization_code";
            String s = null;
            try {
    // 发送HTTPS请求, GET请求这个文档有写，然后注意是GET或者POST都是大写 没有参数所以最后一个为null，
                s = HttpsREQUEST.HttpsRequest(url, "GET", null);
            } catch (Exception e) {
                e.printStackTrace();
            }
    // Gson的使用 ： Json字符串转化为到java实体的
            Token token = gson.fromJson(s, Token.class);
    // 实体类的封装获取
            String access_token = token.getAccess_token();
            String openid = token.getOpenid();
    
    // 页面授权第四步，通过 access_token openid 换取 用户信息 下面就和上面的一样了
            String infoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + access_token
                    + "&openid=" + openid
                    + "&lang=zh_CN ";
            String info = null;
            try {
                info = HttpsREQUEST.HttpsRequest(infoUrl, "GET", null);
            } catch (Exception e) {
                e.printStackTrace();
            }
            Info infos = gson.fromJson(info, Info.class);
    
            //1、使用用户信息直接登录，无需注册和绑定
            req.setAttribute("info", infos);
            req.getRequestDispatcher("/newjsp.jsp").forward(req, resp);
        }
    
    }

index.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <meta name="viewport" content="width=device--width,initial-scale=1.0">
            <title>JSP Page</title>
        </head>
        <body style="font-size: 40px;text-align: center">
            <a href="/WeixinAuth/wxLogin">微信登录</a>
        </body>
    </html>

newjsp.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
    <!DOCTYPE html>
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
            <title>JSP Page</title>
        </head>
        <body>
            登录成功！
            <div>用户昵称${info.nickname}</div>
            <div>用户头像<img style="vertical-align: top;" width="100px" height="100px" alt="" src="${info.headimgurl}"></div>
        </body>
    </html>

网页授权大概就到这里了，后续有机会的话应该会帖微信支付的代码

[Java微信公众号–1–基本配置接入开发者模式][Java_1]

[Java微信公众号–2–微信菜单和消息管理][Java_2]

[Java—发送HTTPS请求][Java_HTTPS]

[SouthEast]: /images/20220603/e0f524b7cccb4cd3ac683f74cdefd61e.png
[SouthEast 1]: /images/20220603/7bc811afcb9d40329c5953b76fe5b651.png
[-_40001]: http://blog.csdn.net/qq_38637558/article/details/78549928
[Java_HTTPS]: http://blog.csdn.net/qq_38637558/article/details/78668349
[jar]: https://pan.baidu.com/s/1hrDRw24
[SouthEast 2]: /images/20220603/35f0b4d5027d4e64ab0b2e63756fbbac.png
[Java_1]: http://blog.csdn.net/qq_38637558/article/details/78631667
[Java_2]: http://blog.csdn.net/qq_38637558/article/details/78668252