使用第三方SDK进行网页授权

柔光的暖阳◎ 2022-03-07 08:28 319阅读 0赞

## **springboot项目** ##

**1.引入pom依赖**

dependency>
        <groupId>com.github.binarywang</groupId>
        <artifactId>weixin-java-mp</artifactId>
        <version>2.7.0</version>
    </dependency>

**2.创建配置类，引入参数**

package com.imooc.sell.config;
    
    import lombok.Data;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.stereotype.Component;
    
    /**微信支付与网页授权的配置对象类
     * @Author:
     * @Date: 2019/3/15 17:50
     * @Version 1.0
     */
    @Data
    @Component
    @ConfigurationProperties(prefix = "wechat")
    public class WechatAccountConfig {
    /*公众号appid*/
        private String mpAppId;
    /*公众号secret*/
        private String mpAppSecret;
       
       
    
    }

在application.properties里面配置mpAppid和mpAppsercert ,这两个参数在测试号的最上面有

#测试号的相关的appid和appsecret
    
    wechat.mpAppId =xxxxxx
    wechat.mpAppSecret =xxxxxxxx

**3.创建配置类返回一个WxMpService,为神魔要这个对象可以参考sdk**

package com.imooc.sell.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;
    
    /**
     * @Author: 
     * @Date: 2019/3/15 17:41
     * @Version 1.0
     */
    @Component//注解为配置类
    public class WechatMPConfig {
        @Autowired
        WechatAccountConfig wechatAccountConfig;
        @Bean
        public WxMpService wxMpService()
        {
            WxMpService wxMpService = new WxMpServiceImpl();
            wxMpService.setWxMpConfigStorage(wxMpConfigStorage());
            return wxMpService;
        }
        @Bean
        public WxMpConfigStorage wxMpConfigStorage()
        {
            WxMpInMemoryConfigStorage wxMpConfigStorage = new WxMpInMemoryConfigStorage();
            //在这里我们要设置appid 和 appsecret 需要在配置文件里面设置两个变量，这样全局都可以用
            //然后设置一个WechatAccountConfig类，来注入这两个参数，这样在使用的时候就可以直接调用这两个类
             wxMpConfigStorage.setAppId(wechatAccountConfig.getMpAppId());
             wxMpConfigStorage.setSecret(wechatAccountConfig.getMpAppSecret());
             return  wxMpConfigStorage;
        }
    }

**4.创建WechatController**

package com.imooc.sell.controller;
    
    import com.imooc.sell.enums.ResultEnum;
    import com.imooc.sell.exception.ResultException;
    import lombok.extern.slf4j.Slf4j;
    import me.chanjar.weixin.common.api.WxConsts;
    import me.chanjar.weixin.common.bean.WxAccessToken;
    import me.chanjar.weixin.common.exception.WxErrorException;
    import me.chanjar.weixin.mp.api.WxMpService;
    import me.chanjar.weixin.mp.api.impl.WxMpServiceImpl;
    import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
    import net.bytebuddy.asm.Advice;
    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 org.springframework.web.bind.annotation.RestController;
    
    import java.net.URLEncoder;
    
    /**
     * @Author: 
     * @Date: 2019/3/15 17:38
     * @Version 1.0
     */
    @Controller
    @RequestMapping("/wechat")
    @Slf4j
    public class WechatController {
        @Autowired
      private WxMpService wxMpService;
    
        @GetMapping("/authorize")
        public String  authorize(@RequestParam("returnUrl") String returnUrl)
        {
    
            //1.配置
            //2.调用方法
            String url = 外网地址+"/sell/wechat/userinfo";
            //返回之后从定向的url,调用方法
            String  redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url, WxConsts.OAUTH2_SCOPE_BASE, URLEncoder.encode(returnUrl));
            log.info("【微信网页授权】返回redirectUrl = {}",redirectUrl  );
    
            return "redirect:"+redirectUrl;
    
        }
        @GetMapping("/userinfo")
        public String  userInfo(@RequestParam("code") String code,
                             @RequestParam("state") String returnUrl){
            WxMpOAuth2AccessToken wxMpOAuth2AccessToken  = new WxMpOAuth2AccessToken();
            try {
                wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
            } catch (WxErrorException e) {
                log.error("【微信网页授权】获取accessToken失败");
             
            }
            String openId = wxMpOAuth2AccessToken.getOpenId();
            log.info("【微信网页授权】openid={}",openId);
    
             return "redirect:"+returnUrl+"?openid="+ openId;
    
        }
    }

**这样我们就可以通过访问http://域名/项目名/wechat/authorize?return\_url=XXXXXXX在微信里面获取到授权了**

## **注意域名必须是可以在外网访问的** ##