java @Service
时间: 2024-01-24 17:35:20 浏览: 68
Service.java
@Service注解用于标记一个类是一个service类,并将其自动注入到Spring容器中。加上该注解后,不需要再在applicationContext.xml文件中定义bean。\[1\]
在使用@Service注解时,可以指定一个别名,方便在其他类中注入该service类。如果不指定别名,别名默认为当前类名的首字母小写。\[3\]
例如,在下面的代码中,@Service注解标记了一个名为UserServiceImpl的类,并将其注入到Spring容器中。在调用该service类时,只需要将该类注入到接口中即可。\[1\]
```java
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserMapper userMapper;
public User login(String username, String pwd){
return userMapper.selectByNameAndPwd(username,pwd);
}
}
```
另外,@Service注解还可以与其他注解一起使用,例如@Component、@Repository、@Controller。这些注解在自动扫描指定路径下的包时,会自动注册到Spring容器中,无需在applicationContext.xml中定义bean。\[2\]
#### 引用[.reference_title]
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- *3* [spring注解@Service注解的使用详解](https://blog.csdn.net/weixin_29467909/article/details/114168511)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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