java - 在应用程序上下文中使用Spring注释的 Controller bean重复项

当我在应用上下文中定义波纹管控制器时，尝试使用它时出现重复错误。
如何在不获取重复错误消息的情况下将构造函数参数传递给控制器​​？
我的应用程序上下文:

 <context:component-scan base-package="org.brickred.socialauth.spring.controller" />

 <bean id="socialAuthWebController" class="org.brickred.socialauth.spring.controller.SocialAuthWebController">
    <constructor-arg value="http://www.mysite.com/" />
    <constructor-arg value="/authSuccess.html" />
    <constructor-arg value="/failed.html" />
 </bean>

 <tx:annotation-driven transaction-manager="txManager"/>

带注释的控制器:

    @Controller
    @RequestMapping("/socialauth")
    public class SocialAuthWebController {

    private String baseCallbackUrl;
    private String successPageURL;
    private String accessDeniedPageURL;
    @Autowired
    private SocialAuthTemplate socialAuthTemplate;
    @Autowired
    private SocialAuthManager socialAuthManager;
    private final Log LOG = LogFactory.getLog(getClass());

    /**
     * Constructs a SocialAuthWebController.
     *
     * @param applicationUrl
     *            the base URL for this application (with context e.g
     *            http://opensource.brickred.com/socialauthdemo, used to
     *            construct the callback URL passed to the providers
     * @param successPageURL
     *            the URL of success page or controller, where you want to
     *            access sign in user details like profile, contacts etc.
     * @param accessDeniedPageURL
     *            the URL of page where you want to redirect when user denied
     *            the permission.
     */
    @Inject
    public SocialAuthWebController(final String applicationUrl,
                    final String successPageURL, final String accessDeniedPageURL) {
            this.baseCallbackUrl = applicationUrl;
            this.successPageURL = successPageURL;
            this.accessDeniedPageURL = accessDeniedPageURL;
    }
    ...

其余的源代码位于
http://code.google.com/p/socialauth/source/browse/trunk/socialauth-spring/src/org/brickred/socialauth/spring/controller/SocialAuthWebController.java
我收到以下错误:org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'socialAuthWebController' defined in URL [jar:file://Tomcat%207.0/webapps/ROOT/WEB-INF/lib/socialauth-spring-2.0-beta2.jar!/org/brickred/socialauth/spring/controller/SocialAuthWebController.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [java.lang.String]: : No matching bean of type [java.lang.String] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [java.lang.String] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}

最佳答案

正如其他帖子所指出的那样，由于在XML和批注中定义了相同的Controller，您将收到错误消息。删除控制器的XML配置并执行以下操作:

由于成功和失败URL并不是真正的配置值，而是在您的应用中定义的，因此将1)作为硬编码值直接移到处理程序方法中，或者将2)作为多个方法或控制器所共有的URL，将它们作为常量移动到所有其他Controller扩展的BaseController中。然后，您完全避免了这两个参数的DI问题。

剩下baseCallbackUrl。如果这是一个依赖于应用程序URL的值，则可以将该值用作系统变量，然后使用@Value直接注入它，如下所示:

@Value("#{systemProperties.baseCallbackUrl}")
private String baseCallbackUrl;