Question

I want to create Factory Class. for example is FooFactory. before Foo instanced, FooFacoty must be injected ServletContext to the constructor. I have snippet as follows:

public class FooFactory() {
    public static Foo getFoo() {
        ctx = //getservlet context
        Foo foo = new Foo(ctx);

            return foo;
    }
}

Answer 1

EDIT: You can use ServletContextFactoryBean. You can then pass a reference to this into your factory (e.g. as a method argument.). Like this

   <bean id="servletContext" class="org.springframework.web.context.support.ServletContextFactoryBean"/>

   <bean id="foo" class="FooFactory" factory-method="getFoo">
      <constructor-arg index="0" ref="servletContext"/>
   </bean>

You then change FooFactory.getFoo to

   public static Foo getFoo(ServletContext ctx) {
        Foo foo = new Foo(ctx);
        return foo;
   }

There is no direct way that I know of, but you can do it indirectly by implementing ServletContextAware or ApplicationContextAware.

This article describes the details.