CTO 說(shuō)了，用錯(cuò)@Autowired 和@Resource 的人可以領(lǐng)盒飯了
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介 紹
@Autowire
private?JdbcTemplate?jdbcTemplate;
“Field injection is not recommended Inspection info: Spring Team recommends: "Always use constructor based dependency injection in your beans. Always use assertions for mandatory dependencies".
注入方式
public?class?UserServiceImpl?implents?UserService{
????private?UserDao?userDao;
????@Autowire
????public?UserServiceImpl(UserDao?userDao){
????????this.userDao?=?userDao;
????}
}
public?class?UserServiceImpl?implents?UserService{
?????private?UserDao?userDao;
?????@Autowire
?????public?serUserDao(UserDao?userDao){
?????????this.userDao?=?userDao;
?????}
?}
public?class?UserServiceImpl?implents?UserService{
?????@Autowire
?????private?UserDao?userDao;
?}
基于字段的依賴注入缺點(diǎn)
| 對(duì)于有final修飾的變量不好使
public?class?VerifyServiceImpl?implents?VerifyService{
??private?AccountService?accountService;
??private?UserService?userService;
??private?IDService?idService;
??private?RoleService?roleService;
??private?PermissionService?permissionService;
??private?EnterpriseService?enterpriseService;
??private?EmployeeService?employService;
??private?TaskService?taskService;
??private?RedisService?redisService;
??private?MQService?mqService;
??public?SystemLogDto(AccountService?accountService,?
??????????????????????UserService?userService,?
??????????????????????IDService?idService,?
??????????????????????RoleService?roleService,?
??????????????????????PermissionService?permissionService,?
??????????????????????EnterpriseService?enterpriseService,?
??????????????????????EmployeeService?employService,?
??????????????????????TaskService?taskService,?
??????????????????????RedisService?redisService,?
??????????????????????MQService?mqService)?{
??????this.accountService?=?accountService;
??????this.userService?=?userService;
??????this.idService?=?idService;
??????this.roleService?=?roleService;
??????this.permissionService?=?permissionService;
??????this.enterpriseService?=?enterpriseService;
??????this.employService?=?employService;
??????this.taskService?=?taskService;
??????this.redisService?=?redisService;
??????this.mqService?=?mqService;
??}
}
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