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若依系统(分离版后端)自带的账号验证是基于 

UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(username, password);

验证，然后在系统中controller或service类中 SecurityUtils 工具类中直接可获取用户或用户ID等

SecurityUtils.getLoginUser().getUser();

现在想实现，微信小程序通过code等登录后返回和之前一样的token后原逻辑中的SecurityUtils一样可以获取到，则需要自定义扩展登录类。废话不多说，上代码：

类似于UsernamePasswordAuthenticationToken类，自定义AuthCodeAuthenticationToken.java

在这个位置：

AuthCodeAuthenticationToken.java：

package com.ruoyi.framework;import org.springframework.security.authentication.AbstractAuthenticationToken;
import org.springframework.security.core.GrantedAuthority;import java.util.Collection;public class AuthCodeAuthenticationToken extends AbstractAuthenticationToken {private final Object principal;public AuthCodeAuthenticationToken(Object principal) {super(null);this.principal= principal;}public AuthCodeAuthenticationToken(Object principal, Collection<? extends GrantedAuthority> authorities) {super(authorities);this.principal= principal;super.setAuthenticated(true);}@Overridepublic Object getCredentials() {return null;}@Overridepublic Object getPrincipal() {return this.principal;}@Overridepublic void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException {if (isAuthenticated) {throw new IllegalArgumentException("Cannot set this token to trusted - use constructor which takes a GrantedAuthority list instead");}super.setAuthenticated(false);}
}

AuthCodeAuthenticationProvider.java

package com.ruoyi.framework;import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;public class AuthCodeAuthenticationProvider implements AuthenticationProvider {private UserDetailsService userDetailsService;public AuthCodeAuthenticationProvider(UserDetailsService userDetailsService) {setUserDetailsService(userDetailsService);}@Overridepublic Authentication authenticate(Authentication authentication) throws AuthenticationException {AuthCodeAuthenticationToken authCodeAuthenticationToken = (AuthCodeAuthenticationToken) authentication;String telephone = (String) authentication.getPrincipal();UserDetails userDetails = userDetailsService.loadUserByUsername(telephone);AuthCodeAuthenticationToken authenticationResult = new AuthCodeAuthenticationToken(userDetails, userDetails.getAuthorities());authenticationResult.setDetails(authentication.getDetails());return authenticationResult;}@Overridepublic boolean supports(Class<?> authentication) {return AuthCodeAuthenticationToken.class.isAssignableFrom(authentication);}public UserDetailsService getUserDetailsService() {return userDetailsService;}public void setUserDetailsService(UserDetailsService userDetailsService) {this.userDetailsService = userDetailsService;}
}

在这里还要重写UserDetailsServiceByAuthCodeImpl.java原逻辑是调用的UserDetailsServiceImpl.java中的loadUserByUsername方法。

package com.ruoyi.framework.web.service;import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.enums.UserStatus;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.service.ISysUserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;@Slf4j
@Service("userDetailsByAuthCode")
public class UserDetailsServiceByAuthCodeImpl implements UserDetailsService {@Autowiredprivate ISysUserService userService;@Autowiredprivate SysPermissionService permissionService;@Overridepublic UserDetails loadUserByUsername(String username) throws UsernameNotFoundException{SysUser user = userService.selectUserByUserName(username);if (StringUtils.isNull(user)){log.info("登录用户：{} 不存在.", username);throw new ServiceException(MessageUtils.message("user.not.exists"));}else if (UserStatus.DELETED.getCode().equals(user.getDelFlag())){log.info("登录用户：{} 已被删除.", username);throw new ServiceException(MessageUtils.message("user.password.delete"));}else if (UserStatus.DISABLE.getCode().equals(user.getStatus())){log.info("登录用户：{} 已被停用.", username);throw new ServiceException(MessageUtils.message("user.blocked"));}return createLoginUser(user);}public UserDetails createLoginUser(SysUser user){return new LoginUser(user.getUserId(), user.getDeptId(), user, permissionService.getMenuPermission(user));}
}

在SecurityConfig.java中配置自定义的登录逻辑(顶部注入，下面增加配置)

配置中api开头的接口，该放开(登录获取token的接口)的放开：

温馨提示：一定要区分原来的UserDetailsService 使用注解@Qualifier("userDetailsByAuthCode")区分，原来的也要加上，不然启动时候注入重复，原来的serviceImpl实现类也要加上，如下：

SysLoginService.java中

public String wxLogin(String userName){// 用户验证Authentication authentication = null;try{AuthCodeAuthenticationToken authCodeAuthenticationToken = new AuthCodeAuthenticationToken(userName);AuthenticationContextHolder.setContext(authCodeAuthenticationToken);// 该方法会去调用UserDetailsServiceImpl.loadUserByUsernameauthentication = authenticationManager.authenticate(authCodeAuthenticationToken);}catch (Exception e){if (e instanceof BadCredentialsException){AsyncManager.me().execute(AsyncFactory.recordLogininfor(userName, Constants.LOGIN_FAIL, MessageUtils.message("user.password.not.match")));throw new UserPasswordNotMatchException();}else{AsyncManager.me().execute(AsyncFactory.recordLogininfor(userName, Constants.LOGIN_FAIL, e.getMessage()));throw new ServiceException(e.getMessage());}}finally{AuthenticationContextHolder.clearContext();}AsyncManager.me().execute(AsyncFactory.recordLogininfor(userName, Constants.LOGIN_SUCCESS, MessageUtils.message("user.login.success")));LoginUser loginUser = (LoginUser) authentication.getPrincipal();recordLoginInfo(loginUser.getUserId());// 生成tokenreturn tokenService.createToken(loginUser);}

接口调用中可以如下调用了：