如何在aem 6.3中使用sling模型获取页面属性？

package com.example.models;

import javax.inject.Inject;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.models.annotations.DefaultInjectionStrategy;
import org.apache.sling.models.annotations.Model;

@Model(adaptables = Resource.class, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class MyModel {
    @Inject
    private String pageTitle;

    public String getPageTitle() {
        return pageTitle;
    }
}

package com.example.servlets;

import javax.servlet.Servlet;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.servlets.HttpConstants;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.models.factory.ModelFactory;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

@Component(service = Servlet.class, property = { "sling.servlet.methods=" + HttpConstants.METHOD_GET,
        "sling.servlet.paths=" + "/bin/my-servlet" })
public class MyServlet extends SlingSafeMethodsServlet {
    @Reference
    private ModelFactory modelFactory;

    @Override
    protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) {
        Resource resource = request.getResource();
        MyModel myModel = modelFactory.createModel(resource, MyModel.class);
        String pageTitle = myModel.getPageTitle();
        // 使用获取到的页面属性进行后续操作
    }
}