未在ViewController中的对象上调用方法（= ViewScoped ManagedBean）

Question

Simple enough question... inside a commandLink's action attribute, can I call a method on an object provided by a viewController? I can't get the following setup to work, and I don't know what the problem is - I don't get errors, there's just nothing happening.

TestObject

public class TestObject {
    public void testMethod() {
        System.out.println("This is a test method");
    }
}

ViewController

@ManagedBean
@ViewScoped
public class ViewController {

    private TestObject testObject = new TestObject();

    public TestObject getTestObject() {
        return testObject;
    }

    public void testMethod() {
        testObject.testMethod();
    }
}

JSF

<!-- This does not work -->
<h:commandLink action="#{viewController.testObject.testMethod}" value="On internal Object"/>
<!-- This works -->
<h:commandLink action="#{viewController.testMethod}" value="On ViewController"/>

---

EDIT: Sorry, forgot to mention it: I tried to call testMethod() and also viewController.getTestObject().testMethod() to no avail.

Answer 1

I think the problem is, that the action parameter expects a method, not a object property. Try to call:

<h:commandLink action="#{viewController.testObject.testMethod()}" value="On internal Object"/>

Then the property testObject from the viewController gets received and testMethod() get invoked.

Answer 2

尝试这个：

<h:commandLink action="#{viewController.testObject.testMethod()}" value="On internal Object"/>