Spring MVC 中的@Transactional 显示问题

Question

我是 spring mvc 的新手，我刚开始一个基于 java 配置的项目在构建我的项目时，我从 Tomcat 日志中收到此消息：

SEVERE: Context initialization failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'countryController': Unsatisfied dependency expressed through field 'countryService'; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'countryService' is expected to be of type 'com.djamel.service.CountryService' but was actually of type 'com.sun.proxy.$Proxy37'

这是我的 CountryService class :

@Service
public class CountryService implements Services<Country>{

    @Autowired
    CountryDao countryDao;

    @Autowired
    CityDao cityDao;

    ...

    @Transactional
    public Long add(Country country) {

       Long key = countryDao.add(country);

       if(!country.getCities().isEmpty()){
          for (City city : country.getCities()) {
              cityDao.add(key, city);
          }         
       }

       return (long) 1;
    }

    ...

}

这是我的配置 Class :

@Configuration
@EnableWebMvc
@EnableTransactionManagement
@ComponentScan(basePackages = "com.djamel")
public class AppConfig {

    @Bean
    public DataSource dataSource() {
        ...
    }

    @Bean
    public JdbcTemplate jdbcTemplate(DataSource dataSource) {
        ...
    }   
}

请问，我该如何解决这个问题？

Answer 1

您没有 post 您的控制器代码或服务接口。但是，从堆栈跟踪看来 Spring 正在尝试使用接口代理来满足依赖关系。在控制器中向您的服务添加限定符应该可以修复它。类似于：

public class CountryController{
..
@Autowired @Qualifier("CountryService")
private Services<Country> countryService;
..
..
}

Spring MVC 中的@Transactional 显示问题

@Transactional in Spring MVC showing problem

spring

spring-mvc

spring-transactions