我爱java系列---【springboot整合微信扫码登陆】

1.pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>wxlogin-web</artifactId>
    <description>二维码登录功能demo</description>
    <packaging>war</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <!-- 日志 -->
        <slf4j.version>1.7.25</slf4j.version>
        <log4j2.version>2.7</log4j2.version>
        <!-- 异步日志 -->
        <disruptor.version>3.2.0</disruptor.version>
        <!--fastjson工具类 -->
        <fastjson.version>1.2.45</fastjson.version>
    </properties>
    <dependencies>
        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.68</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>
        <!-- Log4j2 异步支持 -->
        <dependency>
            <groupId>com.lmax</groupId>
            <artifactId>disruptor</artifactId>
            <version>${disruptor.version}</version>
        </dependency>
        <!-- Apache Commons Logging 1.x接口的日志输出转向log4j2输出 -->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-jcl</artifactId>
        </dependency>
        <!-- 集成测试 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>
</project>

2.前端代码login.html

<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8"/>
    <title>登录</title>
</head>
<body>
<!--登录框-->
<div >
    <form class="login-form">
        <!--二维码登录-->
        <div id="weixin"></div>
    </form>
</div>

<!--微信官方提供的生成二维码的js-->
<script src="http://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js"></script> 
</body> 
<script> 
var obj = new WxLogin({ 
　　　　　　　　　　self_redirect:true, 
　　　　　　　　　　id:"weixin", 
　　　　　　　　　　appid: "wx7287a60bb700fd21", #微信开放平台中申请的appid
　　　　　　　　　　scope: "snsapi_login", #固定参数，可以参照微信开放平台中的文档
　　　　　　　　　　redirect_uri: "http://www.txjava.cn/login" #注意：后台在host文件中添加：“127.0.0.1   www.txjava.cn”，后台springboot项目的端口号为80
　　　　　　　　　　}); 
</script> 
</html>

3.LoginController.java

@Controller
@RequestMapping("/login")
@Slf4j
public class LoginController {
    @Autowired
    private RestTemplate restTemplate;

    @GetMapping
    public void login(HttpServletRequest request, HttpServletResponse response) {
        //获取到code值
        String code = request.getParameter("code");
        //判断
        if (code == null) {
            throw new RuntimeException("用户禁止授权");
        }
        //获取到了code值，回调没有问题
        //定义地址
        String token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=wx7287a60bb700fd21&secret=1ef8755f92bebae8ad7bab432ba29cbf&code="
                + code + "&grant_type=authorization_code";
        //发送请求
        String json = restTemplate.getForObject(token_url, String.class);
        WxToken token = parseObject(json, WxToken.class);
        //获取到接口调用凭证
        //获取个人信息
        String user_url = "https://api.weixin.qq.com/sns/userinfo?access_token="+token.getAccess_token()+"&openid="+token.getOpenid();
        String jsonStr1 = restTemplate.getForObject(user_url, String.class);
        JSONObject jsonStr = (JSONObject) JSON.parse(jsonStr1);
　　　　　//用户名
        String nickname = (String) jsonStr.get("nickname");
　　　　 //用户头像地址
        String headimgurl = (String) jsonStr.get("headimgurl");
        request.setAttribute("nickname",nickname);
        request.setAttribute("headimgurl",headimgurl);
        log.info("微信返回的用户对象:jsonStr1:{}",jsonStr);
        try {
            request.getRequestDispatcher("/main.html").forward(request, response);
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException("微信扫描登陆异常");
        }
    }
}

4.WxToken.java

public class WxToken implements Serializable {

    private String access_token;
    private String expires_in;
    private String refresh_token;
    private String openid;
    private String scope;
    private String unionid;

    public String getAccess_token() {
        return access_token;
    }

    public void setAccess_token(String access_token) {
        this.access_token = access_token;
    }

    public String getExpires_in() {
        return expires_in;
    }

    public void setExpires_in(String 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;
    }

    public String getUnionid() {
        return unionid;
    }

    public void setUnionid(String unionid) {
        this.unionid = unionid;
    }
}

5.application.properties

spring.application.name=wxlogin
server.port=80
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原文地址：https://www.cnblogs.com/hujunwei/p/12918647.html