Question

My applicationContext.xml:

<bean id="studentService" class="com.coe.StudentService">
    <property name="studentProfile" ref="studentProfile" />
</bean>

<bean id="studentProfile" class="com.coe.student.StudentProfile">

</bean>

My web.xml:

<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>

My classes:

StudentService{
private StudentProfile studentProfile;
//has appropriate getters/setters

}

StudentProfile{
private String name;
//has getter/setter

}

i have a jsp that calls studentService.studentProfile.name, and the error says that studentProfile is null

My assumption is that when the server starts up, Spring instantiates all objects as requested, so when the StudentService is called, would not Spring also set StudentProfile?

Answer 1

Not really an answer to your question, but a possible solution to your problem, if you’re willing to work with annotations instead:

Web.xml

<!-- Spring -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>spring.xml</param-value>
</context-param>

Spring.xml

<context:component-scan base-package="com.coe" />

Java code

@Service
StudentService{
@Autowired
private StudentProfile studentProfile; }

@Repository//???
StudentProfile{
private String name;}

That said I have a little trouble understanding why StudentProfile would be a bean (assuming every student has a profile) and StudentService would have reference to a single StudentProfile, but that might just be your terminology.. (Or my lack of understanding thereof)