博客

1. 查看

微信开发文档

2. 申请

测试号

，可以获取到appId和appsecret（下面application.yml参数配置用到）

3. 在测试号页面，关注自己的测试公众号。

4.  网页授权获取用户信息点击修改，填上自己的域名，可以使用

内网穿透

工具将本地映射成域名

5. 在项目中引入微信开发包和

   <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-mp</artifactId>
            <version>2.9.0</version>
   </dependency>

具体maven依赖如下：

 <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-mp</artifactId>
            <version>2.9.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

6. 创建三个类

代码分别是：

package com.example.wechatlogin.config;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Data
@Component
@ConfigurationProperties(prefix = "wechat")
public class WeChatAccountConfig {

    private String mpAppId;

    private String mpAppSecret;


}

package com.example.wechatlogin.config;

import me.chanjar.weixin.mp.api.WxMpConfigStorage;
import me.chanjar.weixin.mp.api.WxMpInMemoryConfigStorage;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.api.impl.WxMpServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

@Component
public class WeChatMpConfig {

    @Autowired
    private WeChatAccountConfig wechatAccountConfig;

    @Bean
    public WxMpService wxMpService(){
        WxMpService wxMpService = new WxMpServiceImpl();
        wxMpService.setWxMpConfigStorage(wxMpConfigStorage());
        return wxMpService;
    }

    public WxMpConfigStorage wxMpConfigStorage(){
        WxMpInMemoryConfigStorage wxMpConfigStorage = new WxMpInMemoryConfigStorage();
        wxMpConfigStorage.setAppId(wechatAccountConfig.getMpAppId());
        wxMpConfigStorage.setSecret(wechatAccountConfig.getMpAppSecret());
        return wxMpConfigStorage;
    }

}

package com.example.wechatlogin.controller;


import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.exception.WxErrorException;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

@Controller
@RequestMapping("/wechat")
@Slf4j
public class WechatController {

    @Autowired
    private WxMpService wxMpService;

    @GetMapping("/authorize")
    public String authorize(@RequestParam("returnUrl") String returnUrl) throws UnsupportedEncodingException {
        String url = "http://canxu.natapp1.cc/wechat/userInfo";
        String redirectURL = wxMpService.oauth2buildAuthorizationUrl(url, WxConsts.OAuth2Scope.SNSAPI_USERINFO, URLEncoder.encode(returnUrl, "utf-8"));
        log.info("【微信网页授权】获取code,redirectURL={}", redirectURL);
        return "redirect:" + redirectURL;
    }

    @GetMapping("/userInfo")
    public String userInfo( @RequestParam("code") String code,
                            @RequestParam("state") String returnUrl) throws Exception {
        log.info("【微信网页授权】code={}", code);
        log.info("【微信网页授权】state={}", returnUrl);
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken;
        try {
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        } catch (WxErrorException e) {
            log.info("【微信网页授权】{}", e);
            throw new Exception(e.getError().getErrorMsg());
        }
        String openId = wxMpOAuth2AccessToken.getOpenId();
        log.info("【微信网页授权】openId={}", openId);
        return "redirect:" + returnUrl + "?openid=" + openId;
    }

    @GetMapping("/get")
    public String get( String code, String returnUrl) {
        log.info("【微信网页授权】code={}", code);
        log.info("【微信网页授权】state={}", returnUrl);
        System.out.println("haha");
        return "hello";
    }
}

7. 在application.yml中添加参数配置

wechat:
  mpAppId: wxb5dab0749b717091
  mpAppSecret: 591162d2dd78727e2b2b818d1e621e1d

8.最后在微信（注意把链接放到微信上）

访问xxx.natapp1.cc/wechat/authorize?returnUrl=’回调的地址’ ，

如xxx.natapp1.cc/wechat/authorize?returnUrl=

https://www.baidu.com