代码地址如下：
http://www.demodashi.com/demo/12736.html

登录流程时序登录流程时序

具体的登录说明查看 小程序官方API

项目的结构图：

springboot项目搭建

使用idea作为开发工具，由gradle构建项目，搭建springboot项目，对这块儿不熟悉的可以自行去学习，此处不多赘述。下面是核心的配置文件。application.yml中配置springboot默认的参数，application.properties配置自定义的参数，可以统一配置在一个文件中，依据个人习惯。

buidle.gradle配置

buildscript {
	ext {
		springBootVersion = \'1.5.10.RELEASE\'
	}
	repositories {
        mavenLocal()
		maven { url \'http://maven.aliyun.com/nexus/content/groups/public\' }
		mavenCentral()
	}
	dependencies {
		classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
	}
}

apply plugin: \'java\'
apply plugin: \'org.springframework.boot\'

group = \'xin.yangmj\'
version = \'1.0.1\'
sourceCompatibility = 1.8

repositories {
    mavenLocal()
	maven { url \'http://maven.aliyun.com/nexus/content/groups/public\' }
	mavenCentral()
}

dependencies {
	compile(\'org.springframework.boot:spring-boot-starter-cache\')
	compile(\'org.springframework.boot:spring-boot-starter-data-redis\')
	compile(\'org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.1\')
	compile(\'org.springframework.boot:spring-boot-starter-security\')
	compile(\'org.springframework.boot:spring-boot-starter-web\')
    compile(\'mysql:mysql-connector-java\')
    compile(\'org.springframework.security:spring-security-test\')
    testCompile(\'org.springframework.boot:spring-boot-starter-test\')
    compile group: \'org.apache.commons\', name: \'commons-lang3\', version: \'3.7\'
}

application.yml

logging:
  level:
    root: DEBUG

spring:
    datasource:
        url: jdbc:mysql://localhost/remindme?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8
        username: root
        password: root
        driver-class-name: com.mysql.jdbc.Driver

    redis:
        host: localhost
        password:
        port: 6379

mybatis:
    mapperLocations: classpath:mapper/*.xml
    configuration:
        mapUnderscoreToCamelCase: true
        default-enum-type-handler: org.apache.ibatis.type.EnumOrdinalTypeHandler

application.properties

# JWT相关配置
jwt.header=Authorization
# 过期时间
jwt.expiration=864000
# 注意有一个空格
jwt.tokenHead=Bearer 

# wechat Auth
auth.wechat.sessionHost=https://api.weixin.qq.com/sns/jscode2session
auth.wechat.appId=***
auth.wechat.secret=***
auth.wechat.grantType=authorization_code

权限相关的配置

WebSecurityConfig.java

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationEntryPoint unauthorizedHandler;

    @Bean
    public ThirdSessionAuthFilter authenticationTokenFilterBean() throws Exception {
        return new ThirdSessionAuthFilter();
    }

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // 由于使用的是JWT，我们这里不需要csrf
                .csrf().disable()
                .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
                // 基于token，所以不需要session
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                .authorizeRequests()
                // 允许对test的无授权访问
                .antMatchers(HttpMethod.GET, "/test").permitAll()
                // 对于获取token的rest api要允许匿名访问
                .antMatchers("/auth").permitAll();

        // 添加本地地三方session filter
        httpSecurity
                .addFilterBefore(authenticationTokenFilterBean(), UsernamePasswordAuthenticationFilter.class);

        // 禁用缓存
        httpSecurity.headers().cacheControl();
    }

}

ThirdSessionAuthFilter.java

@Component
public class ThirdSessionAuthFilter extends OncePerRequestFilter {

    @Value("${jwt.header}")
    private String tokenHeader;

    @Value("${jwt.tokenHead}")
    private String tokenHead;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Autowired
    private ConsumerMapper consumerMapper;

    @Override
    protected void doFilterInternal(HttpServletRequest request,
                                    HttpServletResponse response,
                                    FilterChain chain) throws ServletException, IOException {
        //获取请求头部分的Authorization
        String authHeader = request.getHeader(this.tokenHeader);
        //如果请求路径为微信通知后台支付结果则不需要token（之后会在具体的controller中，对双方签名进行验证防钓鱼）
        String url = request.getRequestURI().substring(request.getContextPath().length());

        if (url.equals("/auth") || url.equals("/test")) {
            chain.doFilter(request, response);
            return;
        }

        if (null == authHeader || !authHeader.startsWith("Bearer")) {
            throw new RuntimeException("非法访问用户");
        }
        // The part after "Bearer "
        final String thirdSessionId = authHeader.substring(tokenHead.length());
        String wxSessionObj = stringRedisTemplate.opsForValue().get(thirdSessionId);
        if (StringUtils.isEmpty(wxSessionObj)) {
            throw new RuntimeException("用户身份已过期");
        }

        // 设置当前登录用户
        try (AppContext appContext = new AppContext(wxSessionObj.substring(wxSessionObj.indexOf("#") + 1))) {
            chain.doFilter(request, response);
        }
    }

}

AppContext.java

public class AppContext implements AutoCloseable {

    private static final ThreadLocal<String> CURRENT_CONSUMER_WECHAT_OPENID = new ThreadLocal<>();

    public AppContext(String wechatOpenid) {
        CURRENT_CONSUMER_WECHAT_OPENID.set(wechatOpenid);
    }

    @Override
    public void close() {
        CURRENT_CONSUMER_WECHAT_OPENID.remove();
    }

    public static String getCurrentUserWechatOpenId() {
        return CURRENT_CONSUMER_WECHAT_OPENID.get();
    }

}

JwtAuthenticationEntryPoint.java

@Component
public class JwtAuthenticationEntryPoint implements AuthenticationEntryPoint, Serializable {

    private static final long serialVersionUID = -8970718410437077606L;

    @Override
    public void commence(HttpServletRequest request,
                         HttpServletResponse response,
                         AuthenticationException authException) throws IOException {
        response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Unauthorized");
    }

}

WechatAuthProperties.java

@Component
public class WechatAuthProperties {

    @Value("${auth.wechat.sessionHost}")
    private String sessionHost;

    @Value("${auth.wechat.appId}")
    private String appId;

    @Value("${auth.wechat.secret}")
    private String secret;

    @Value("${auth.wechat.grantType}")
    private String grantType;
	
	//省略getter setter

}

相关实体类对象

public class AccountDto {
    private Long id;
    private String username;
    private Long phone;
    private Gender gender;
    private String vcode;
    private String password;
    private String promotionCode;
    private String InvitationCode;
    private String clientAssertion;
    private String code;
    
    //省略 getter setter
}

Consumer.java

public class Consumer {

    private Long id;
    private String username;
    private String wechatOpenid;
    private Long phone;
    private String nickname;
    private String avatarUrl;
    private Gender gender;
    private String email;
    private Long lastLoginTime;
    private Boolean deleted;
    private Long createdBy;
    private Long createdAt;
    private Long updatedBy;
    private Long updatedAt;
	// 省略 gettter setter
}

Gender.java

public enum Gender {
    UNKNOW(0, "未知"),
    MAN(1, "先生"),
    WOMAN(2, "女士");

    private Byte value;
    private String name;

    Gender(int value, String name) {
        this.value = (byte)value;
        this.name = name;
    }

    public Byte getValue() {
        return this.value;
    }

    public String getName() {
        return this.name;
    }
}

• API接口类

@RestController
public class AuthEndpoint {

    @Value("${jwt.header}")
    private String tokenHeader;

    @Value("${jwt.tokenHead}")
    private String tokenHead;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Autowired
    private WechatService wechatService;

    @GetMapping("/test")
    public String test() {
        return "test_success";
    }

    @GetMapping("/testAuth")
    public String testAuth() {
        return "testAuth_success";
    }

    @PostMapping("/auth")
    public ResponseEntity<WechatAuthenticationResponse> createAuthenticationToken(@RequestBody AccountDto accountDto)
            throws AuthenticationException {
        WechatAuthenticationResponse jwtResponse = wechatService.wechatLogin(accountDto.getCode());
        return ResponseEntity.ok(jwtResponse);
    }

    @PostMapping("/updateConsumerInfo")
    public void updateConsumerInfo(@RequestBody Consumer consumer) {
        wechatService.updateConsumerInfo(consumer);
    }

}

注册核心流程

@Service
public class WechatService {

    private static final Logger LOGGER = LoggerFactory.getLogger(WechatService.class);

    @Autowired
    private ConsumerMapper consumerMapper;

    /**
     * 服务器第三方session有效时间，单位秒, 默认1天
     */
    private static final Long EXPIRES = 86400L;

    private RestTemplate wxAuthRestTemplate = new RestTemplate();

    @Autowired
    private WechatAuthProperties wechatAuthProperties;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    public WechatAuthenticationResponse wechatLogin(String code) {
        WechatAuthCodeResponse response = getWxSession(code);

        String wxOpenId = response.getOpenid();
        String wxSessionKey = response.getSessionKey();
        Consumer consumer = new Consumer();
        consumer.setWechatOpenid(wxOpenId);
        loginOrRegisterConsumer(consumer);

        Long expires = response.getExpiresIn();
        String thirdSession = create3rdSession(wxOpenId, wxSessionKey, expires);
        return new WechatAuthenticationResponse(thirdSession);
    }

    public WechatAuthCodeResponse getWxSession(String code) {
        LOGGER.info(code);
        String urlString = "?appid={appid}&secret={srcret}&js_code={code}&grant_type={grantType}";
        String response = wxAuthRestTemplate.getForObject(
                wechatAuthProperties.getSessionHost() + urlString, String.class,
                wechatAuthProperties.getAppId(),
                wechatAuthProperties.getSecret(),
                code,
                wechatAuthProperties.getGrantType());
        ObjectMapper objectMapper = new ObjectMapper();
        ObjectReader reader = objectMapper.readerFor(WechatAuthCodeResponse.class);
        WechatAuthCodeResponse res;
        try {
            res = reader.readValue(response);
        } catch (IOException e) {
            res = null;
            LOGGER.error("反序列化失败", e);
        }
        LOGGER.info(response);
        if (null == res) {
            throw new RuntimeException("调用微信接口失败");
        }
        if (res.getErrcode() != null) {
            throw new RuntimeException(res.getErrmsg());
        }
        res.setExpiresIn(res.getExpiresIn() != null ? res.getExpiresIn() : EXPIRES);
        return res;
    }

    public String create3rdSession(String wxOpenId, String wxSessionKey, Long expires) {
        String thirdSessionKey = RandomStringUtils.randomAlphanumeric(64);
        StringBuffer sb = new StringBuffer();
        sb.append(wxSessionKey).append("#").append(wxOpenId);

        stringRedisTemplate.opsForValue().set(thirdSessionKey, sb.toString(), expires, TimeUnit.SECONDS);
        return thirdSessionKey;
    }

    private void loginOrRegisterConsumer(Consumer consumer) {
        Consumer consumer1 = consumerMapper.findConsumerByWechatOpenid(consumer.getWechatOpenid());
        if (null == consumer1) {
            consumerMapper.insertConsumer(consumer);
        }
    }

    public void updateConsumerInfo(Consumer consumer) {
        Consumer consumerExist = consumerMapper.findConsumerByWechatOpenid(AppContext.getCurrentUserWechatOpenId());
        consumerExist.setUpdatedBy(1L);
        consumerExist.setUpdatedAt(System.currentTimeMillis());
        consumerExist.setGender(consumer.getGender());
        consumerExist.setAvatarUrl(consumer.getAvatarUrl());
        consumerExist.setWechatOpenid(consumer.getWechatOpenid());
        consumerExist.setEmail(consumer.getEmail());
        consumerExist.setNickname(consumer.getNickname());
        consumerExist.setPhone(consumer.getPhone());
        consumerExist.setUsername(consumer.getUsername());
        consumerMapper.updateConsumer(consumerExist);
    }

}

微信小程序代码片段

wx.login() 获取code，然后携带code发送请求到自己服务端，获取登录信息。然后 wx.getUserInfo() 获取用户的基本信息，例如：昵称、头像等，上传本地服务器保存用户基本信息。

    // 登录
    wx.login({
      success: function(res) {
        if (res.code) {
          wx.request({
            url: "http://localhost:8080/auth",
            data: {
              code: res.code
            },
            method: "POST",
            header: {
              \'content-type\': \'application/json\',
            },
            success: function (res) {
              console.log(res.data.access_token);
              var token = res.data.access_token;
              
              wx.getUserInfo({
                success: res => {              
                  // 保存用户信息到服务端
                  wx.request({
                    url: "http://localhost:8080/updateConsumerInfo",
                    data: res.userInfo,
                    method: "POST",
                    header: {
                      \'Authorization\': \'Bearer \' + token,
                      \'content-type\': \'application/json\',
                    },
                    success: function (res) {
                      console.log("success");
                    },
                    fail: function (error) {
                      console.log(error);
                    }
                  })
                }
              })

            },
            fail: function (error) {
              console.log(error);
            }
          })
        } else {
          console.log("error code " + res.errMsg);
        }
      }
    })

效果展示

• 刷新微信小程序缓存，编译使发送请求
  

• 发送登录请求，完成后获取到 access_token
  

• 发送获取用户信息请求
  

• 小程序请求本地服务器登录接口
  

• 本地服务器请求微信服务器登录接口
  

• 小程序请求本地服务器更新用户信息接口
  

• redis保存会话信息
  

• mysql数据库存储用户信息
  微信小程序登录JAVA后台

代码地址如下：
http://www.demodashi.com/demo/12736.html

注：本文著作权归作者，由demo大师代发，拒绝转载，转载需要作者授权