Service类
@Controller
public class AdminRoleService {
@Autowired
AdminRoleMapper adminRoleMapper;
public AdminRole selectByPrimaryKey(Integer roleId) {
AdminRole adminRole = adminRoleMapper.selectByPrimaryKey(10001);
return adminRole;
}
}
测试调用类
@Resource
AdminRoleService adminRoleService;
@Test
void contextLoads() {
AdminRole adminRole = adminRoleService.selectByPrimaryKey(10001);
log.info(adminRole.getTitle());
}
注意:调用有@Autowired的类,不能用new,否则Autowiredl类会出现null,应该用@Resource或@Autowired注入进来
@Resource与@Autowired注解区别
@Autowired 默认byName方式
@Resource 默认byName方式,如果找不到名字,会调用byType方式自动装配
@Autowired 通过 @Qualifier(value = “Address2”) 指定名称
@Resource 通过 @Resource(name = “Address2”) 指定名称
@Resource 比较强大,性能比较差