Spring最常用的7大类注解，史上最强整理！

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来自：blog.csdn.net/Lubanjava/article/details/100579554

随着技术的更新迭代，Java5.0开始支持注解。而作为java中的领军框架spring，自从更新了2.5版本之后也开始慢慢舍弃xml配置，更多使用注解来控制spring框架。

而spring的的注解那么多，可能做java很多年，都用不上。这里按照类型总结了这7种最常用的注解。

一. 核心注解

@Component
publicclassUser{
@Autowired
privateAddress address;
}

@Component
publicclassUser{
privateAddress address;

@AutoWired
public setAddress(Address address) {
// custom code
this.address=address;
}
}

@Component
publicclassUser{
privateAddress address;

publicUser(Address address) {
this.address=address;
}
}

"user"class="xx.User"/>

@Component
publicclassUser{
@Autowired
@Qualifier("address1")
privateAddress address;
...
}

@Configuartion
publicclassSpringCoreConfig{
@Bean
publicAdminUser adminUser() {
AdminUser adminUser = newAdminUser();
return adminUser;
}
}

二. Spring MVC和REST注解

@Controller
@RequestMapping("/users")
publicclassUserController{
@RequestMapping(method = RequestMethod.GET)
publicString getUserList() {
return"users";
}
}

• @GetMapping

• @PostMapping

• @PutMapping

• @PatchMapping

• @DeleteMapping

@ReuestMapping("/cookieValue")
publicvoid getCookieValue(@CookieValue("JSESSIONID") String cookie){

}

@CrossOrigin(maxAge = 3600)
@RestController
@RequestMapping("/users")
publicclassAccountController{
@CrossOrigin(origins = "http://xx.com")
@RequestMapping("/login")
publicResult userLogin() {
// ...
}
}

// GET /pets/42;q=11;r=22
@RequestMapping(value = "/pets/{petId}")
publicvoid findPet(@PathVariableString petId, @MatrixVariableint q) {
// petId == 42
// q == 11
}

enable-matrix-variables="true"/>

@Configuration
publicclassWebConfigextendsWebMvcConfigurerAdapter{

@Override
publicvoid configurePathMatch(PathMatchConfigurer configurer) {
UrlPathHelper urlPathHelper = newUrlPathHelper();
        urlPathHelper.setRemoveSemicolonContent(false);
        configurer.setUrlPathHelper(urlPathHelper);
}
}

@RequestMapping("/users/{uid}")

@RequestMapping("/users/{uid}")
publicString execute(@PathVariable("uid") String uid){
}
@RequestAttribute

@ModelAttribute("user")

publicPUser getUser() {}

// controller和上面的代码在同一controller中
@Controller
@SeesionAttributes(value = "user", types = {
User.class
})

publicclassUserController{}

三. Spring Boot注解

• @Configuration

• @EnableAutoConfiguration

• @ComponentScan

四. Stereotype注解

五. 数据访问注解

六. 任务执行、调度注解

@Scheduled(fixedDelay=1000)
publicvoid schedule() {

}

@Scheduled(fixedRate=1000)
publicvoid schedulg() {

}

七. 测试注解

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringCoreConfig.class)
publicclassUserServiceTest{

}

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