Spring使用java config在会话范围内定义一个bean

问题描述

我想在会话范围内使用bean，但收到错误消息:

I would like to use a bean in session scope, but I receive an error:

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\testRestService\WEB-INF\classes\test\server\config\AppConfig.class];
nested exception is java.lang.annotation.AnnotationFormatError: Invalid default: public abstract org.springframework.beans.factory.annotation.Autowire org.springframework.config.java.annotation.Bean.autowire()

人豆:

public class Person {
//This is a Pojo
//...
}

AppConfig:

The AppConfig:

@Configuration
@EnableWebMvc
@ComponentScan("test.server")
public class AppConfig extends WebMvcConfigurerAdapter {

    @Bean(scope = DefaultScopes.SESSION)
    @ScopedProxy
    public Person getPerson() {
        return new Person();
    }
}

服务的人

@Component
public class PersonService implements IPersonService {

    @Autowired
    protected Person person;

    @Override
    public void setPerson(Person person) {
        this.person = person;
    }

    @Override
    public Person getPerson() {
        return this.person;
    }
}

PersonController:

The PersonController:

@RestController()
@RequestMapping("/person")
public class PersonController {

    @Autowired
    private IPersonService personService;

    @InitBinder
    protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) {
        binder.registerCustomEditor(Person.class, new GenericEditor<Person>(Person.class));
    }

    @RequestMapping(value = "/setPerson", method = RequestMethod.GET)
    public String setPerson(@RequestParam(value = "person") Person person) {
         this.personService.setPerson(person);
         return "Person: " + person + " saved.";
    }

    @RequestMapping(value = "/getPerson", method = RequestMethod.GET)
    public Person getPerson() {
         return this.personService.getPerson();
    }
}

我尝试在Person bean上使用@Scope("session")，在这种情况下，我没有在appconfig中使用@ScopedProxy批注，而是使用@org.springframework.context.annotation.Bean("person")而不是org.springframework.config.java.annotation.Bean(scope = DefaultScopes.SESSION).在这种情况下，我没有收到任何错误，但是在我测试时，Person bean不在会话范围内.

I tried to use @Scope("session") on the Person bean, in this case I did not use the @ScopedProxy annotation in appconfig and used the @org.springframework.context.annotation.Bean("person") instead of org.springframework.config.java.annotation.Bean(scope = DefaultScopes.SESSION). In this case I didn't receive an error, but the Person bean wasn't in the session scope when I tested it.

感谢您的帮助.

推荐答案

JDK动态代理支持会话级Bean.您的代码中需要进行以下修改:

Session level beans are supported through JDK dynamic proxies. The following modifications are required in your code:

• 从AppConfig类中删除getPerson()方法
• 不要自动将您的bean连接到PersonService中，只需使用其默认构造函数实例化它即可.
• 使用以下注释批注PersonService:
  • @Scope(值=会话"，proxyMode = ScopedProxyMode.INTERFACES)
  • remove the getPerson() method from the AppConfig class
  • do not autowire your bean in PersonService, just instantiate it with it's default constructor
  • annotate the PersonService with the following:
    • @Scope(value = "session", proxyMode = ScopedProxyMode.INTERFACES)

    这篇关于Spring使用java config在会话范围内定义一个bean的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！