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POspring @inject not working in Controller
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  1. POspring @inject not working in Controller
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    copied!<p>I am using context:component-scan, still the dependencies are not getting injected. </p> <p>Here is my setup. ConnectionHelper property is not getting injected in the LoginController class. </p> <p>WEB-INF/web.xml</p> <pre><code>&lt;context-param&gt; &lt;param-name&gt;log4jConfigLocation&lt;/param-name&gt; &lt;param-value&gt;/WEB-INF/classes/log4j.properties&lt;/param-value&gt; &lt;/context-param&gt; &lt;listener&gt; &lt;listener-class&gt; org.springframework.web.context.ContextLoaderListener &lt;/listener-class&gt; &lt;/listener&gt; &lt;servlet&gt; &lt;servlet-name&gt;vd&lt;/servlet-name&gt; &lt;servlet-class&gt; org.springframework.web.servlet.DispatcherServlet &lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;vd&lt;/servlet-name&gt; &lt;url-pattern&gt;/&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; </code></pre> <p>WEB-INF/applicationContext.xml</p> <pre><code>&lt;beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-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/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"&gt; &lt;context:component-scan base-package="com.example" /&gt; &lt;/beans&gt; </code></pre> <p>WEB-INF/vd-servlet.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-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/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"&gt; &lt;!-- Configures Handler Interceptors --&gt; &lt;mvc:interceptors&gt; &lt;bean class="com.example.interceptors.SslInterceptor" /&gt; &lt;mvc:interceptor&gt; &lt;mvc:mapping path="/login" /&gt; &lt;bean class="com.example.interceptors.SslInterceptor" /&gt; &lt;/mvc:interceptor&gt; &lt;/mvc:interceptors&gt; &lt;mvc:resources mapping="/resources/**" location="/resources/" /&gt; &lt;mvc:resources mapping="/WEB-INF/views/**" location="/WEB-INF/views/" /&gt; &lt;bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"&gt; &lt;property name="prefix" value="/WEB-INF/views/" /&gt; &lt;property name="suffix" value=".html" /&gt; &lt;/bean&gt; &lt;/beans&gt; </code></pre> <p>com.example.controllers.LoginController.java</p> <pre><code>@Controller public class LoginController { @Inject private ConnectionHelper connectionHelper; //this is null after loading } </code></pre> <p>com.example.connection.ConnectionHelper.java</p> <pre><code>@Component public class ConnectionHelper { } </code></pre> <p>Please tell me what's wrong here...after hours of troubleshooting i can't determine the problem.</p> <p><strong>Update</strong></p> <p>I changed my configuration and moved everything to vd-servlet.xml.</p> <p>Quite miraculously I have found that <code>@Autowired</code> works (Injects Dependencies) with this configuration but <code>@Inject</code> does not.</p> <p>And <code>&lt;mvc:annotation-driven /&gt;</code> is still required even if you use <code>&lt;context:component-scan /&gt;</code>, otherwise @RequestMapping is not detected.</p> <p>vd-servlet.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-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/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"&gt; &lt;mvc:annotation-driven /&gt; &lt;context:component-scan base-package="com.example" /&gt; &lt;mvc:interceptors&gt; &lt;bean class="com.example.interceptors.SslInterceptor" /&gt; &lt;mvc:interceptor&gt; &lt;mvc:mapping path="/login" /&gt; &lt;bean class="com.example.interceptors.SslInterceptor" /&gt; &lt;/mvc:interceptor&gt; &lt;/mvc:interceptors&gt; &lt;mvc:resources mapping="/resources/**" location="/resources/" /&gt; &lt;mvc:resources mapping="/WEB-INF/views/**" location="/WEB-INF/views/" /&gt; &lt;bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"&gt; &lt;property name="prefix" value="/WEB-INF/views/" /&gt; &lt;property name="suffix" value=".html" /&gt; &lt;/bean&gt; &lt;/beans&gt; </code></pre>
 

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