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POSpring DI Unsatisfied dependency expressed
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  1. POSpring DI Unsatisfied dependency expressed
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    copied!<p>applicationContext.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"&gt; &lt;bean id="user" class="com.pomkine.pottyauth.domain.User"/&gt; &lt;bean id="userdao" class="com.pomkine.pottyauth.persistance.GaeUserDao"/&gt; &lt;bean id="userservice" class="com.pomkine.pottyauth.service.UserServiceImpl"&gt; &lt;constructor-arg ref="userdao"/&gt; &lt;/bean&gt; &lt;/beans&gt; </code></pre> <p>Controller:</p> <pre><code>@Controller public class RosterController { private UserService userService; @Inject public RosterController(UserService userService){ this.userService=userService; } @RequestMapping(value = {"/userRoster"}, method = RequestMethod.GET) public String showRosterPage(Map&lt;String,Object&gt; model){ model.put("users",userService.getAllUsers()); return "userRoster"; } } </code></pre> <p>So I want UserService to be injected into my controller. But I'm getting the following exception: </p> <pre><code>org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rosterController' defined in file [S:\Coding\Idea_workspace\pottyAuth\target\pottyAuth-1.0\WEB-INF\classes\com\pomkine\pottyauth\mvc\RosterController.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.pomkine.pottyauth.service.UserService]: : No matching bean of type [com.pomkine.pottyauth.service.UserService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. </code></pre> <p>Here is my UserServiceImpl class:</p> <pre><code>public class UserServiceImpl implements UserService { private UserDao dao; public UserServiceImpl(UserDao dao){ this.dao=dao; } @Override public User getUser(User user) { return dao.getUser(user); } @Override public void addUser(User user) { dao.addUser(user); } @Override public List getAllUsers() { return dao.getAllUsers(); } } </code></pre> <p>So I'm expecting Spring container to create UserServiceImlp bean and inject it into RosterController. But it seems that it cannot find UserServiceImpl bean.</p> <p>What could be wrong?</p>
 

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