Spring的注解@Qualifier注解
@Qualifier注解了，qualifier的意思是合格者，通过这个标示，表明了哪个实现类才是我们所需要的，我们修改调用代码，添加@Qualifier注解，需要注意的是@Qualifier的参数名称必须为我们之前定义@Service注解的名称之一！ 例子：
@Service("a")
public class EmployeeServiceImpl implements EmployeeService {
public EmployeeDto getEmployeeById(Long id) {
return new EmployeeDto();
}
}
@Service("b")
public class EmployeeServiceImpl1 implements EmployeeService {
public EmployeeDto getEmployeeById(Long id) {
return new EmployeeDto();
}
}
@Controller
@RequestMapping("/emplayee.do")
public class EmployeeInfoControl {
@Autowired
@Qualifier("b")
EmployeeService employeeService;
@RequestMapping(params = "method=showEmplayeeInfo")
public void showEmplayeeInfo(HttpServletRequest request, HttpServletResponse response, EmployeeDto dto) {
#略
}
}
