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PONullpointerexception in injecting Spring 3 service to JSF 2 ManagedBean
 

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  1. PONullpointerexception in injecting Spring 3 service to JSF 2 ManagedBean
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    <p>Actually I have seen a lot of similar questions here. Unfortunately I could not solve the problem by following the advices. Here are my codes. Could anyone find me where the problem could be? Thanks much.</p> <p>pom.xml</p> <pre><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;co.amity.sales&lt;/groupId&gt; &lt;artifactId&gt;amitysales&lt;/artifactId&gt; &lt;packaging&gt;war&lt;/packaging&gt; &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt; &lt;name&gt;amitysales Maven Webapp&lt;/name&gt; &lt;url&gt;http://maven.apache.org&lt;/url&gt; &lt;repositories&gt; &lt;repository&gt; &lt;id&gt;prime-repo&lt;/id&gt; &lt;name&gt;PrimeFaces Maven Repository&lt;/name&gt; &lt;url&gt;http://repository.primefaces.org&lt;/url&gt; &lt;layout&gt;default&lt;/layout&gt; &lt;/repository&gt; &lt;/repositories&gt; &lt;properties&gt; &lt;maven.test.failure.ignore&gt;true&lt;/maven.test.failure.ignore&gt; &lt;spring.framework.version&gt;3.2.0.RELEASE&lt;/spring.framework.version&gt; &lt;/properties&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;junit&lt;/groupId&gt; &lt;artifactId&gt;junit&lt;/artifactId&gt; &lt;version&gt;3.8.1&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;!-- Spring --&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-aop&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-aspects&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-context&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-context-support&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-core&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-expression&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-orm&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-test&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-tx&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-web&lt;/artifactId&gt; &lt;version&gt;${spring.framework.version}&lt;/version&gt; &lt;/dependency&gt; &lt;!-- Hibernate --&gt; &lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-entitymanager&lt;/artifactId&gt; &lt;version&gt;3.6.8.Final&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;javax.validation&lt;/groupId&gt; &lt;artifactId&gt;validation-api&lt;/artifactId&gt; &lt;version&gt;1.0.0.GA&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-validator&lt;/artifactId&gt; &lt;version&gt;4.3.1.Final&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;mysql&lt;/groupId&gt; &lt;artifactId&gt;mysql-connector-java&lt;/artifactId&gt; &lt;version&gt;5.1.23&lt;/version&gt; &lt;/dependency&gt; &lt;!-- JSF --&gt; &lt;dependency&gt; &lt;groupId&gt;com.sun.faces&lt;/groupId&gt; &lt;artifactId&gt;jsf-api&lt;/artifactId&gt; &lt;version&gt;2.1.6&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;com.sun.faces&lt;/groupId&gt; &lt;artifactId&gt;jsf-impl&lt;/artifactId&gt; &lt;version&gt;2.1.6&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;javax.servlet&lt;/groupId&gt; &lt;artifactId&gt;jstl&lt;/artifactId&gt; &lt;version&gt;1.2&lt;/version&gt; &lt;/dependency&gt; &lt;!-- Primefaces --&gt; &lt;dependency&gt; &lt;groupId&gt;org.primefaces&lt;/groupId&gt; &lt;artifactId&gt;primefaces&lt;/artifactId&gt; &lt;version&gt;3.5&lt;/version&gt; &lt;/dependency&gt; &lt;!-- c3p0 dependency --&gt; &lt;dependency&gt; &lt;groupId&gt;c3p0&lt;/groupId&gt; &lt;artifactId&gt;c3p0&lt;/artifactId&gt; &lt;version&gt;0.9.1.2&lt;/version&gt; &lt;/dependency&gt; &lt;!-- &lt;dependency&gt; &lt;groupId&gt;javax.inject&lt;/groupId&gt; &lt;artifactId&gt;javax.inject&lt;/artifactId&gt; &lt;version&gt;1&lt;/version&gt; &lt;/dependency&gt; --&gt; &lt;/dependencies&gt; &lt;build&gt; &lt;finalName&gt;amitysales&lt;/finalName&gt; &lt;/build&gt; &lt;/project&gt; </code></pre> <p>web.xml</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"&gt; &lt;context-param&gt; &lt;param-name&gt;contextConfigLocation&lt;/param-name&gt; &lt;param-value&gt;classpath:app-context.xml&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;listener&gt; &lt;listener-class&gt;org.springframework.web.context.request.RequestContextListener&lt;/listener-class&gt; &lt;/listener&gt; &lt;servlet&gt; &lt;servlet-name&gt;Faces Servlet&lt;/servlet-name&gt; &lt;servlet-class&gt;javax.faces.webapp.FacesServlet&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;Faces Servlet&lt;/servlet-name&gt; &lt;url-pattern&gt;*.jsf&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;Faces Servlet&lt;/servlet-name&gt; &lt;url-pattern&gt;/faces/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;/web-app&gt; </code></pre> <p>faces-config.xml</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;faces-config xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_1.xsd" version="2.1"&gt; &lt;application&gt; &lt;el-resolver&gt; org.springframework.web.jsf.el.SpringBeanFacesELResolver &lt;/el-resolver&gt; &lt;/application&gt; &lt;!-- configuration of navigation rules --&gt; &lt;navigation-rule&gt; &lt;from-view-id&gt;/index.xhtml&lt;/from-view-id&gt; &lt;navigation-case&gt; &lt;from-outcome&gt;success&lt;/from-outcome&gt; &lt;to-view-id&gt;/success.xhtml&lt;/to-view-id&gt; &lt;/navigation-case&gt; &lt;/navigation-rule&gt; &lt;/faces-config&gt; </code></pre> <p>app-contex.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:context="http://www.springframework.org/schema/context" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"&gt; &lt;description&gt;Example configuration to get you started.&lt;/description&gt; &lt;!-- &lt;jdbc:embedded-database id="dataSource" type="H2"&gt; &lt;jdbc:script location="classpath:schema.sql" /&gt; &lt;jdbc:script location="classpath:test-data.sql" /&gt; &lt;/jdbc:embedded-database&gt; --&gt; &lt;bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"&gt; &lt;property name="entityManagerFactory" ref="emf" /&gt; &lt;/bean&gt; &lt;tx:annotation-driven transaction-manager="transactionManager" /&gt; &lt;!-- Data Source Declaration --&gt; &lt;bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"&gt; &lt;property name="driverClassName" value="com.mysql.jdbc.Driver" /&gt; &lt;property name="url" value="jdbc:mysql://localhost:3306/sales" /&gt; &lt;property name="username" value="root" /&gt; &lt;property name="password" value="root" /&gt; &lt;/bean&gt; &lt;bean id="emf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"&gt; &lt;property name="dataSource" ref="dataSource" /&gt; &lt;property name="jpaVendorAdapter"&gt; &lt;bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" /&gt; &lt;/property&gt; &lt;property name="packagesToScan" value="co.hyperclean.sales.entity" /&gt; &lt;property name="jpaProperties"&gt; &lt;props&gt; &lt;prop key="hibernate.dialect"&gt;org.hibernate.dialect.MySQLDialect&lt;/prop&gt; &lt;prop key="hibernate.max_fetch_depth"&gt;3&lt;/prop&gt; &lt;prop key="hibernate.jdbc.fetch_size"&gt;50&lt;/prop&gt; &lt;prop key="hibernate.jdbc.batch_size"&gt;10&lt;/prop&gt; &lt;prop key="hibernate.show_sql"&gt;true&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;/bean&gt; &lt;context:annotation-config /&gt; &lt;context:component-scan base-package="co.hyperclean.sales" /&gt; &lt;/beans&gt; </code></pre> <p>UserServiceImpl.java</p> <pre><code>package co.hyperclean.sales.service.impl; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.TypedQuery; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.stereotype.Repository; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import co.hyperclean.sales.entity.Users; import co.hyperclean.sales.service.UserService; @Service("jpaUserService") @Repository @Transactional public class UserServiceImpl implements UserService { private Log log = LogFactory.getLog(UserServiceImpl.class); @PersistenceContext private EntityManager em; @Transactional(readOnly=true) public List&lt;Users&gt; findAll() { List&lt;Users&gt; contacts = em.createNamedQuery("Users.findAll", Users.class).getResultList(); return contacts; } @Transactional(readOnly=true) public Users findById(int id) { TypedQuery&lt;Users&gt; query = em.createNamedQuery("Users.findById", Users.class); query.setParameter("id", id); return query.getSingleResult(); } } </code></pre> <p>UserManagedBean.java</p> <pre><code>package co.hyperclean.sales.jsf.bean; import java.util.ArrayList; import java.util.List; import javax.faces.bean.ManagedBean; import javax.faces.bean.RequestScoped; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.dao.DataAccessException; import co.hyperclean.sales.entity.Users; import co.hyperclean.sales.service.UserService; @ManagedBean(name="usersManagedBean") @RequestScoped public class UsersManagedBean { // Spring User Service is injected... //@ManagedProperty(value = "#{jpaUserService}") @Autowired UserService userService; List&lt;Users&gt; userList = new ArrayList&lt;Users&gt;(); private Users user = new Users(); public String searchUser() { try { userList.add(userService.findById(user.getId())); return "success"; } catch (DataAccessException dae) { dae.printStackTrace(); } return "error"; } public UserService getUserService() { return userService; } public void setUserService(UserService userService) { this.userService = userService; } public List&lt;Users&gt; getUserList() { return userList; } public void setUserList(List&lt;Users&gt; userList) { this.userList = userList; } public Users getUser() { return user; } public void setUser(Users user) { this.user = user; } } </code></pre>
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    1. COThe problem is you trying to inject with @autowired. Use @managedproperty to inject into jsf.This is not an option.you should use `@managedproperty` only.examplehttp://www.mkyong.com/jsf2/injecting-managed-beans-in-jsf-2-0/
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    2. COActually, I also tried with @ManagedProperty too. You can see it is commented out in the snippet. Thanks for the answer and link, I will check it out.
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    3. COsetUserService(UserService userService) is called but userService is null.
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