我正在尝试使用 Spring 自动装配一些 bean(用于依赖注入)作为 web 应用程序。一个控制器 bean 包含另一个 bean,而另一个 bean 又保存另一组 bean 的哈希图。目前该地图只有一个条目。当我在 tomcat 中运行并调用该服务时,我收到一条错误消息,指出第二个 bean(保存在控制器中)不是唯一的
No unique bean of type [com.hp.it.km.search.web.suggestion.SuggestionService] is defined: expected single matching bean but found 2: [suggestionService, SuggestionService]
我看不到我在哪里定义了两次 bean,但是我对 Spring 和自动装配很陌生,所以我可能会错过一些基本的东西。下面列出了 xml 和 2 个类的源代码...
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.hp.it.km.search.web.suggestion" />
<mvc:annotation-driven />
<context:annotation-config />
<bean id="SuggestionController" class="com.hp.it.km.search.web.suggestion.SuggestionController">
<property name="service">
<ref bean="SuggestionService" />
</property>
</bean>
<bean id="SuggestionService" class="com.hp.it.km.search.web.suggestion.SuggestionService">
<property name="indexSearchers">
<map>
<entry key="KMSearcher"> <ref bean="KMSearcherBean"></ref></entry>
</map>
</property>
</bean>
<bean id="KMSearcherBean" class="com.hp.it.km.search.web.suggestion.SuggestionIndexSearcher">
<constructor-arg index="0" value="KMSearcher" />
<constructor-arg index="1" value="C://dev//workspace//search-restful-webapp//src//main//resources//indexes//keyword" />
</bean>
与自动装配控制器和服务 bean 相关的类在这里......
@Controller
public class SuggestionController {
private SuggestionService service;
@Autowired
public void setService(SuggestionService service) {
this.service = service;
}
public SuggestionService getService() {
return service;
}
and...
@Component
public class SuggestionService {
private Map<String, IndexSearcher> indexSearchers = new HashMap<String, IndexSearcher>();
@Autowired
public void setIndexSearchers(Map<String, IndexSearcher> indexSearchers) {
this.indexSearchers = indexSearchers;
}
public SuggestionService() {
super(); }
请帮忙!