折腾了我两天的springboot数据源datasource循环依赖问题，都被搞疯掉了

在做项目重构的时候增加了两个功能

　　1、多数据源。

　　2、token的验证从以前的数据库验证，移到了redis端。

1、多数据源使用 druid-spring-boot-starter 套件

　　其核心代码如下

　　

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@Configuration public class DynamicDataSourceConfig {       @Bean     @ConfigurationProperties("spring.datasource.druid.first")     public DataSource firstDataSource(){         return DruidDataSourceBuilder.create().build();     }       @Bean     @ConfigurationProperties("spring.datasource.druid.second")     public DataSource secondDataSource(){         return DruidDataSourceBuilder.create().build();     }       @Bean     @Primary     public DynamicDataSource dataSource(DataSource firstDataSource, DataSource secondDataSource) {         Map<String, DataSource> targetDataSources = new HashMap<>();         //targetDataSources.put(DataSourceContext.FIRST, firstDataSource);         targetDataSources.put(DataSourceContext.SECOND, secondDataSource);         return new DynamicDataSource(firstDataSource, targetDataSources);     } }

　　2、token验证规则使用spring-shiro，核心代码如下

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@Component public class OAuth2Realm extends AuthorizingRealm { //    @Autowired //    private ShiroService shiroService;     @Autowired     private RedisTokenManager redisTokenManager;     @Override     public boolean supports(AuthenticationToken token) {         return token instanceof OAuth2Token;     }       /**      * 授权(验证权限时调用)      */     @Override     protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) { //        SysUserEntity user = (SysUserEntity)principals.getPrimaryPrincipal(); //        Long userId = user.getUserId(); // //        //用户权限列表 //        Set<String> permsSet = shiroService.getUserPermissions(userId); // //        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo(); //        info.setStringPermissions(permsSet); //        return info;         return null;     }       /**      * 认证(登录时调用)      */     @Override     protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {         String accessToken = (String) token.getPrincipal(); //        UsernamePasswordToken up = (UsernamePasswordToken) token;         //根据accessToken，查询用户信息         TokenModel tokenEntity = redisTokenManager.getToken(accessToken);         //token失效         if(tokenEntity == null ){             throw new IncorrectCredentialsException("token失效，请重新登录");         }         SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(tokenEntity.getUserId(), accessToken, getName());         return info; //        if(tokenEntity.getType()==null|| //          Integer.valueOf(tokenEntity.getType()).equals(Constant.LoginUserType.CUSTOM.getValue())){ //          //查询用户信息 //            SysUserEntity user = shiroService.queryUser(tokenEntity.getUserId()); //            //账号锁定 //            if(user.getStatus() == 0){ //                throw new LockedAccountException("账号已被锁定,请联系管理员"); //            } //            SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user, accessToken, getName()); //            return info; //        }else{ //          //查询用户信息 //            SysUserEntity user = shiroService.queryUser(tokenEntity.getUserId()); //            //账号锁定 //            if(user.getStatus() == 0){ //                throw new LockedAccountException("账号已被锁定,请联系管理员"); //            } //            SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user, accessToken, getName()); //            return info; //        }           }   }

 然后启动项目，就出现datasource循环依赖的问题。

The dependencies of some of the beans in the application context form a cycle:

evaluationCarService (field private io.yeliang.business.dao.EvaluationCarDao io.yeliang.business.service.impl.EvaluationCarServiceImpl.evaluationCarDao)
↓
evaluationCarDao defined in file [D:workspace mxc-parent mxc-order-service argetclassesioyeliangusinessdaoEvaluationCarDao.class]
↓
sqlSessionFactory defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]
┌─────┐
| dataSource defined in class path resource [io/yeliang/dynamicdatasource/DynamicDataSourceConfig.class]
↑ ↓
| firstDataSource defined in class path resource [io/yeliang/dynamicdatasource/DynamicDataSourceConfig.class]
↑ ↓
| dataSourceInitializer
└─────┘

过程就不过了，痛苦。

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结论是把

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@Component public class OAuth2Realm extends AuthorizingRealm { //    @Autowired //    private ShiroService shiroService;<br>中这两行的注解打开就行。或随便找个service注册都行。<br>目的是让datasource提前注册到spring容器。<br><br>这个肯定不是好办法，先这样吧。受不了了。记录一下。

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1	有更好的办法，欢迎留言。谢谢