java - Problems with Autowired and Spring Injection -

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lately i've been having problems spring mvc application i'm trying develop. main problem don't know why @autowired annotation not working , that's because have wrong. i'm going post here code can me issue! lot guys:

web.xml

<?xml version="1.0" encoding="utf-8"?> <web-app 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"     version="2.4">      <display-name>helloworld application</display-name>     <description>         simple web application source code organization         based on recommendations of application developer's guide.     </description>      <servlet>         <servlet-name>webdispatcher</servlet-name>         <servlet-class>org.springframework.web.servlet.dispatcherservlet</servlet-class>         <load-on-startup>1</load-on-startup>     </servlet>     <servlet-mapping>         <servlet-name>webdispatcher</servlet-name>         <url-pattern>*.do</url-pattern>     </servlet-mapping>     <filter>         <filter-name>springsecurityfilterchain</filter-name>         <filter-class>org.springframework.web.filter.delegatingfilterproxy</filter-class>     </filter>     <filter-mapping>         <filter-name>springsecurityfilterchain</filter-name>         <url-pattern>/*</url-pattern>     </filter-mapping>     <listener>         <listener-class>org.springframework.web.context.contextloaderlistener</listener-class>     </listener>     <context-param>         <param-name>contextconfiglocation</param-name>         <param-value>             /web-inf/applicationcontext.xml         </param-value>     </context-param>      <welcome-file-list>         <welcome-file>index.jsp</welcome-file>     </welcome-file-list> </web-app>

applicationcontext.xml

<?xml version="1.0" encoding="utf-8"?> <beans xmlns="http://www.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:p="http://www.springframework.org/schema/p"     xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"     xsi:schemalocation="         http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-4.0.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-4.0.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">      <context:annotation-config />     <context:spring-configured />     <context:component-scan base-package="com.agrichem.server" />      <bean id="messagesource"         class="org.springframework.context.support.reloadableresourcebundlemessagesource">         <property name="basename" value="classpath:messages" />         <property name="defaultencoding" value="utf-8" />     </bean>     <bean id="propertyconfigurer"         class="org.springframework.beans.factory.config.propertyplaceholderconfigurer"         p:location="web-inf/jdbc.properties" />      <bean id="datasource" class="org.apache.commons.dbcp.basicdatasource"         destroy-method="close" p:driverclassname="${jdbc.driverclassname}"         p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" />      <bean id="sessionfactory"         class="org.springframework.orm.hibernate4.localsessionfactorybean">         <property name="datasource" ref="datasource" />         <property name="configlocation">             <value>classpath:hibernate.cfg.xml</value>         </property>         <property name="hibernateproperties">             <props>                 <prop key="hibernate.dialect">${jdbc.dialect}</prop>                 <prop key="hibernate.show_sql">true</prop>             </props>         </property>     </bean>      <tx:annotation-driven />     <bean id="transactionmanager"         class="org.springframework.orm.hibernate4.hibernatetransactionmanager">         <property name="sessionfactory" ref="sessionfactory" />     </bean>      <bean id="securitydao"         class="com.agrichem.server.model.repositories.impl.securitydaoimpl">     </bean> </beans>

webdispatcher-servlet.xml

<?xml version="1.0" encoding="utf-8"?> <beans xmlns="http://www.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:p="http://www.springframework.org/schema/p"     xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"     xsi:schemalocation="         http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-4.0.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-4.0.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">      <context:annotation-config />     <context:spring-configured />     <context:component-scan base-package="com.agrichem.server" />      <bean id="viewresolver" class="org.springframework.web.servlet.view.urlbasedviewresolver">         <property name="viewclass" value="org.springframework.web.servlet.view.jstlview"/>         <property name="prefix" value="/views/"/>         <property name="suffix" value=".jsp"/>     </bean>  <!--    <import resource="spring-security-web.xml"/> -->  </beans>

securitydao.java

public interface securitydao {      public boolean validateuser(user user);      public user authenticateuser(user user);      public user getuser (user user);  }

securitydaoimpl.java

@repository("securitydao") public class securitydaoimpl extends hibernatedao implements securitydao {      public securitydaoimpl() {         super();     }      @override     public boolean validateuser(user user) {         query query = opensession()                 .createquery(                         "from user u u.login = :login , u.password = :password");          query.setparameter("login", user.getlogin());         query.setparameter("password", user.getpassword());          return (query.list().size() > 0) ? true : false;     }      @override     public user authenticateuser(user user) {         query query = opensession()                 .createquery(                         "from user u u.login = :login , u.password = :password");          query.setparameter("login", user.getlogin());         query.setparameter("password", user.getpassword());          return (user) query.uniqueresult();     }      @override     public user getuser(user user) {         query query = opensession().createquery(                 "from user u u.login = :login");          query.setparameter("login", user.getlogin());          return (user) query.uniqueresult();     }  }

websecurityconfig.java

@configuration @enablewebmvcsecurity public class websecurityconfig extends websecurityconfigureradapter {      @autowired     public void configureglobal(authenticationmanagerbuilder auth)             throws exception {          auth.userdetailsservice(new customuserdetailsservice());     }      @override     protected void configure(httpsecurity http) throws exception {         http.csrf().disable();         http.authorizerequests().antmatchers("/home/logout.do").permitall()                 .anyrequest().authenticated().and().formlogin()                 .loginpage("/home/login.do").permitall()                 .failureurl("/home/accessdenied.do").permitall();      } }

customuserdetailsservice.java

@configurable @transactional public class customuserdetailsservice implements userdetailsservice {      @autowired     @qualifier("securitydao")     private securitydao securitydao;      @override     public userdetails loaduserbyusername(string arg0)             throws usernamenotfoundexception {          com.agrichem.server.model.security.user user = securitydao                 .getuser(new com.agrichem.server.model.security.user(arg0, ""));          user userdetails = new user(user.getlogin(), user.getpassword(),                 getgrantedauthorities(user.getroles()));          return userdetails;      }      public static list<grantedauthority> getgrantedauthorities(set<role> roles) {         list<grantedauthority> authorities = new arraylist<grantedauthority>();          (role role : roles) {             authorities.add(new simplegrantedauthority(role.getname()));         }         return authorities;     }      public securitydao getsecuritydao() {         return securitydao;     }      public void setsecuritydao(securitydao securitydao) {         this.securitydao = securitydao;     }  }

in point when try login application , i'm gonna check dao access database i'm getting 'securitydao' property null. in customuserdetailsservice in following line : com.agrichem.server.model.security.user user = securitydao.getuser(new com.agrichem.server.model.security.user(arg0, "")); , obvisously i'm getting nullpointerexception.

org.springframework.security.authentication.internalauthenticationserviceexception     @ org.springframework.security.authentication.dao.daoauthenticationprovider.retrieveuser(daoauthenticationprovider.java:110)     @ org.springframework.security.authentication.dao.abstractuserdetailsauthenticationprovider.authenticate(abstractuserdetailsauthenticationprovider.java:132)     @ org.springframework.security.authentication.providermanager.authenticate(providermanager.java:156)     @ org.springframework.security.authentication.providermanager.authenticate(providermanager.java:177)     @ org.springframework.security.web.authentication.usernamepasswordauthenticationfilter.attemptauthentication(usernamepasswordauthenticationfilter.java:94)     @ org.springframework.security.web.authentication.abstractauthenticationprocessingfilter.dofilter(abstractauthenticationprocessingfilter.java:211)     @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342)     @ org.springframework.security.web.authentication.logout.logoutfilter.dofilter(logoutfilter.java:110)     @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342)     @ org.springframework.security.web.header.headerwriterfilter.dofilterinternal(headerwriterfilter.java:57)     @ org.springframework.web.filter.onceperrequestfilter.dofilter(onceperrequestfilter.java:107)     @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342)     @ org.springframework.security.web.context.securitycontextpersistencefilter.dofilter(securitycontextpersistencefilter.java:87)     @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342)     @ org.springframework.security.web.context.request.async.webasyncmanagerintegrationfilter.dofilterinternal(webasyncmanagerintegrationfilter.java:50)     @ org.springframework.web.filter.onceperrequestfilter.dofilter(onceperrequestfilter.java:107)     @ org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342)     @ org.springframework.security.web.filterchainproxy.dofilterinternal(filterchainproxy.java:192)     @ org.springframework.security.web.filterchainproxy.dofilter(filterchainproxy.java:160)     @ org.springframework.web.filter.delegatingfilterproxy.invokedelegate(delegatingfilterproxy.java:344)     @ org.springframework.web.filter.delegatingfilterproxy.dofilter(delegatingfilterproxy.java:261)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:243)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:222)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:123)     @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:502)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:171)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:100)     @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:953)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:118)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:408)     @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1041)     @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:603)     @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:312)     @ java.util.concurrent.threadpoolexecutor.runworker(unknown source)     @ java.util.concurrent.threadpoolexecutor$worker.run(unknown source)     @ java.lang.thread.run(unknown source) caused by: java.lang.nullpointerexception     @ com.agrichem.server.services.security.customuserdetailsservice.loaduserbyusername(customuserdetailsservice.java:35)     @ org.springframework.security.authentication.dao.daoauthenticationprovider.retrieveuser(daoauthenticationprovider.java:102)     ... 36 more

solution:

found it! problem in websecurityconfig doing following:

@autowired     public void configureglobal(authenticationmanagerbuilder auth)             throws exception {          auth.userdetailsservice(**new customuserdetailsservice()**);     }

and new instance of custemuserdetailsservice out of spring control.

to solve added in customuserdetailsservice constructor:

private securitydao securitydao;      public customuserdetailsservice(securitydao securitydao) {         super();         this.securitydao = securitydao;     }

and modified websecurityconfig in way:

@autowired     private securitydao securitydao;      @autowired     public void configureglobal(authenticationmanagerbuilder auth)             throws exception {         auth.userdetailsservice(new customuserdetailsservice(securitydao));     }

thanks anyway help!

eventhough have solved issue, solution ugly in terms of spring dependency injection , inversion of control theories.

basically should never use new keyword instantiate objects if using spring. because objects must instantiated , injected spring container.

applicationcontext.xml

<?xml version="1.0" encoding="utf-8"?> <beans xmlns="http://www.springframework.org/schema/beans"     xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:p="http://www.springframework.org/schema/p"     xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"     xsi:schemalocation="         http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-4.0.xsd         http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context-4.0.xsd         http://www.springframework.org/schema/tx         http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">      <context:annotation-config />     <context:spring-configured />     <context:component-scan base-package="com.agrichem.server" />      <bean id="messagesource"         class="org.springframework.context.support.reloadableresourcebundlemessagesource">         <property name="basename" value="classpath:messages" />         <property name="defaultencoding" value="utf-8" />     </bean>     <bean id="propertyconfigurer"         class="org.springframework.beans.factory.config.propertyplaceholderconfigurer"         p:location="web-inf/jdbc.properties" />      <bean id="datasource" class="org.apache.commons.dbcp.basicdatasource"         destroy-method="close" p:driverclassname="${jdbc.driverclassname}"         p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" />      <bean id="sessionfactory"         class="org.springframework.orm.hibernate4.localsessionfactorybean">         <property name="datasource" ref="datasource" />         <property name="configlocation">             <value>classpath:hibernate.cfg.xml</value>         </property>         <property name="hibernateproperties">             <props>                 <prop key="hibernate.dialect">${jdbc.dialect}</prop>                 <prop key="hibernate.show_sql">true</prop>             </props>         </property>     </bean>      <tx:annotation-driven />     <bean id="transactionmanager"         class="org.springframework.orm.hibernate4.hibernatetransactionmanager">         <property name="sessionfactory" ref="sessionfactory" />     </bean>      <bean id="securitydao"         class="com.agrichem.server.model.repositories.impl.securitydaoimpl">     </bean>      <bean id="customerservice"         class="com.agrichem.server.path.to.service.customuserdetailsservice">     </bean> </beans>

websecurityconfig.java

@configuration @enablewebmvcsecurity public class websecurityconfig extends websecurityconfigureradapter {      @autowired     private userdetailsservice customuserdetailsservice      @autowired     public void configureglobal(authenticationmanagerbuilder auth)             throws exception {          auth.userdetailsservice(customuserdetailsservice);     }      @override     protected void configure(httpsecurity http) throws exception {         http.csrf().disable();         http.authorizerequests().antmatchers("/home/logout.do").permitall()                 .anyrequest().authenticated().and().formlogin()                 .loginpage("/home/login.do").permitall()                 .failureurl("/home/accessdenied.do").permitall();      } }

and should have default constructor customuserdetailsservice doesn't take in arguments. @autowired properties should inject spring container.

furthermore intermixing spring java configuration , spring xml configuration fine, better if decide on 1 particular method define beans.


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